I retrieved these codes : PO31, PO52, PO53, PO91, IO39, IO52, AO48 they had History behind them but Iwant to know what these mean and are they expensive to fix. Any help will be greatly appreciated.

Thanks
Capriceman76


==============

moderator edit
Title

 

The car, year and model is probably obvious to you but not to us.

however, these are probably the codes:

https://www.cadillacforum.com/m_11904/tm.htm

 

The codes dont match but, Its a1993 Cadillac Eldorado with the 4.9 liter V8. And my other question is are these easy repairs meaning: Relays, Sensors Etc. Or amore drastic repair is due?

Thanks Capriceman76

 

PCM Codes (Engine/Transmission)
ECM Codes

prior to 1993, the "P###" (Powertrain) is replaced by an "E####" (Engine)
P000 (E000) ............................................. Cruise Servo Apply Problem
P012 (E012) .................................................. No Distributor Signal
P013 (E013) .......................................... Right Oxygen Sensor Not Ready
P014 (E014) ............................................ Shorted Coolant Temp Sensor
P015 (E015) ........................................ Open Coolant Temp Sensor Signal
P016 (E016) ......................................... Voltage Out of Range [ALL SOL]
P017 (E017) ........................................... Left Oxygen Sensor not ready
P019 (E019) .............................................. Shorted Fuel Pump Circuit
P020 (E020) ................................................. Open Fuel Pump Circuit
P021 (E021) ............................................... Shorted TPS Signal [VCC]
P022 (E022) .................................................. Open TPS Signal [VCC]
P023 (E023) ..................... Electronic Spark Timing (EST) Signal problem [EGR]
P024 (E024) ..................................... Vehicle Speed Sensor signal to TCC
P025 (E025) .................. (Ignition Control Module) 24x Reference Low Indicator
P026 (E026) ......................................... Shorted Throttle Signal Switch
P027 (E027) ............................................ Open throttle signal switch
P028 (E028) ......... Open 3rd or 4th Gear Shift Or Shorted 2-3 Shift Solenoid [VCC]
P029 (E029) .............. Transaxle Shift 'B' solenoid problem (1st, 3rd, 4th gear)
P030 (E030) .................................................. . ISC RPM out of range
P031 (E031) .................................................. ... Shorted MAP Sensor
P032 (E032) ................................................. Open MAP Sensor Signal
P033 (E033) ............................................ Wheel speed sensors problem
P034 (E034) ......................................... MAP Sensor Signal Out of Range
P035 (E035) .......................... PCM reference low signal voltage Out of Range
P036 (E036) ................................. EGR Valve Pintle Position Out of Range
P037 (E037) .............................................. Shorted MAT Sensor Signal
P038 (E038) ................................................. Open MAT Sensor Signal
P039 (E039) ..... Torque Coverter Clutch/Viscous Converter Clutch Engagement Problem
P040 (E040) .................................... Power steering Pressure switch open
P041 (E041) ................... No Cam Reference Signal from Ignition Control Module
P042 (E042) ......................................... Left Oxygen Sensor Signal Lean
P043 (E043) ......................................... Left Oxygen Sensor Signal Rich
P044 (E044) ........................................ Right Oxygen Sensor Signal Lean
P045 (E045) ........................................ Right Oxygen Sensor Signal Rich
P046 (E046) .................................. Right to Left Bank Fueling Difference
P047 (E047) ................................................. IPC - PCM Data Problem
P048 (E048) ......................... Exhaust Gas Recirculation (EGR) system Problem
P049 (E049) .............................. Air Injection Reaction (AIR) System Fault
P050 (E050) ........................................... Second Gear Circuit Pressure
P051 (E051) .................................................. ........ MEM-CAL Error
P052 (E052) .................................................. ..... PCM Memory Reset
P053 (E053) ........................................... Distributor Signal Interrupt
P055 (E055) ............................... Closed Throttle Angle Out of Range [TPS]
P056 (E056) ........................................ Transmission Input Speed Sensor
P057 (E057) .......... Shorted 4th Gear Switch Circuit Or Shorted 3-4 Shift Solenoid
P058 (E058) ................................................ PASSKey Control Problem
P059 (E059) ........................................ Transmission Input speed sensor
P060 (E060) .......................................... Cruise-Transaxle Not in Drive
P061 (E061) ......................................... Cruise - Vent Solenoid Problem
P062 (E062) ....................................... Cruise - Vacuum Solenoid Problem
P063 (E063) ....................................... Set Vs. Vehicle Speed Difference
P064 (E064) ................................. Cruise - Vehicle Acceleration Too High
P065 (E065) .................................................. . Cruise - SPS Failure
P066 (E066) .............................................. Cruise - RPM Out of Range
P067 (E067) ........................................ Cruise Switch shorted at Enable
P068 (E068) ............................ Cruise Command Problem (servo out of range)
P069 (E069) ........................ Traction Control Active During Cruise Operation
P070 (E070) ................................................ Intermittent TPS Signal
P071 (E071) ................................................ Intermittent MAP Signal
P072 (E072) ..................... MAP sensor signal change without TPS signal change
P073 (E073) ..................................... Intermittent Coolant Sensor Signal
P074 (E074) ................................................ Intermittent MAT Signal
P075 (E075) ................................................ Intermittent VSS Signal
P076 (E076) ......................................... Transmission Pressuse Solenoid
P080 (E080) .................................................. ..... Fuel System Rich
P081 (E081) ................................ CAM to 4X reference correlation problem
P083 (E083) .................................. Crankshaft to Ignition Module Failure
P085 (E085) ........................................... Idle Throttle Angle Too High
P086 (E086) ................... Undefined Gear Ratio (Transmission Pressure Control)
P088 (E088) .... Torque converter clutch did not disengage when commanded OFF by PCM
P089 (E089) ................. Long Shift and Maximum Adapt (Trans. Pressure Control)
P090 (E090) ......... VCC/TCC Brake Switch/Park/neutral switch Input Circuit Problem
P091 (E091) .................. PRNDL Switch Problem (transaxle range switch problem)
P092 (E092) ...................................... Heated Windshield Request Problem
P092 (E092) ............................... Traction Control System PWM Link Failure
P093 (E093) ............... Traction control system signals were not received by PCM
P094 (E094) ............ Transaxle Shift "A" Solenoid Problem (Vehicle Speed Sensor)
P095 (E095) .................................................. Engine Stall Detected
P096 (E096) ............................................ Torque Converter Overstress
P097 (E097) .............................................. High RPM P/N to D/R Shift
P098 (E098) .................................... High RPM P/N to D/R Shift Under ISC
P099 (E099) ............................ Cruise Control Servo Applied, Not in Cruise
P102 (E102) .............................. Shorted brake Booster Vacuum (BBV) Sensor
P103 (E100) ....................................... Open Brake Booster Vacuum Sensor
P105 (E105) ........................................... Brake Booster Vacuum Too Low
P106 (E106) ........... Sudden vehicle deceleration w/o brake switch being activated
P107 (E107) .............................................. PCM/BCM Data Link Problem
P108 (E108) .................................................. ........... PROM error
P109 (E109) ....... Keep Alive Memory (KAM) Reset/PCM has lost primary battery power
P110 (E110) ................................... Generator L-terminal Circuit Problem
P112 (E112) .................................................. . PCM PROM EPROM error
P117 (E117) .................... Open/Short Solenoids/Solenoid Wiring (Transmission)
P119 (E119) .......................................... Open or Shorted Fuel Injector
P120 (E120) ................................ A/C low side temperature sensor problem
P121 (E121) ............................... A/C high side temperature sensor problem
P122 (E122) .................. A/C coolant temperature sensor signal voltage problem
P123 (E123) ................................... A/C refrigerant pressure was too low
P124 (E124) ............ A/C compressor circuit was shorted (ON) w/o request by HVAC
P125 (E125) ............. A/C high pressure switch/A/C high side temperature problem
P126 (E126) ....................... A/C high pressure switch disabled A/C compressor
P128 (E128) .................. A/C was disabled because of high refrigerant pressure
P131 (E131) .................................. No signal from the knock sensor (PCM)
P132 (E132) ......................................... Knock Sensor Circuitry Failure
P133 (E133) ........................................ Loss of ABS communications/data
P134 (E134) ............................ Loss of IPC (instrument panel cluster) data
P135 (E135) .................................................. .... Loss of HVAC data
P136 (E136) ................... Loss of DERM (diagnostic energy reserve module) data
P137 (E137) ............................. Loss of TCS (traction control system) Data

Instrument Panel Cluster (IPC) Codes
Code Description
I022 .............................................. Panel Dimming Switch Pot Circuit
I027 .................................................. ...... PRND321 switch failure
I032 .................................................. ........ Loss of ABS/TCS Data
I033 ................................ Loss of Supplemental Inflatable Restraint Data
I034 ........................................ Loss of Powertrain Control Module Data
I037 ...................................... Loss of Air Conditioning Programmer Data
I039 .......................................... Loss of Road Sensing Suspension Data
I041 .................................................. ..... Battery Voltage Too Low
I042 .................................................. .... Battery Voltage Too High
I052 .................................................. ..... Keep Alive Memory Error
I056 ......................................... Instrument Panel Cluster EEPROM Error

Air Conditioning Programer (ACP) Codes
Code Description
A010 ............................................ Outside Temperature Sensor Circuit
A011 .......................................... High Side Temperature Sensor Circuit
A012 ........................................... Low Side Temperature Sensor Circuit
A013 ............................................. In-Car Temperature Sensor Circuit
A015 .................................................. ..... Sun Load Sensor Circuit
A037 ......................................... Loss of Instrument Panel Cluster Data
A040 .......................................... Air Mix Valve (Door) Circuit Problem
A046 .................................................. ...... Low Refrigerant Charge
A047 .................................................. ...... Low Refrigerant Charge
A048 .................................................. .... Low Refrigerant Pressure
A049 ........................................... HVAC - Coolant Temperature Too High
A050 ........................................... HVAC - Coolant Temperature Too High
A052 .................................................. ..... Keep alive memory error

BCM Codes

B110 ....................................... Outside Air Temperature Circuit Problem
B111 ..................................... A/C High Side Temperature Circuit Problem
B112 ......................... A/C Low Side Temperature Circuit Problem [A/C Clutch]
B113 ............................................ In-Car Temperature Circuit Problem
B115 ........................................... Sunload Temperature Circuit Problem
B119 ................................. Twilight Sentinel Photosensor Circuit Problem
B120 ................................... Twilight Sentinel Delay Pot Circuit Problem
B122 ........................................ Panel Lamp Dimming Pot Circuit Problem
B124 .................................................. Speed Sensor Circuit Problem
B127 .......................... PRNDL321 Sensor Circuit Problem [Park Brake Release]
B132 .................................................. . Oil Pressure Sensor Failure
B332 .......................................... ABS/TCS Serial Communication Failure
B333 ................................ Loss of Supplemental Inflatable Restraint Data
B334 .................................. Loss of Electronic Control Module (ECM) Data
B335 ................ Loss of Climate Control Driver Information Center (CCDIC) Data
B336 .................................... Loss of Instrument Panel Cluster (IPC)Data
B337 ................... Loss of Programmer Data [A/C Clutch, Parking Brake Release]
B339 ..................................... Ride Control Serial Communication Failure
B409 .................................................. ..... Charging System Failure
B410 .................................................. ..... Charging System Problem
B411 .................................................. ....... Battery Volts Too Low
B412 .................................................. ...... Battery Volts Too High
B420 .................................................. . BCM Output Driver 1 Failure
B421 .................................................. . BCM Output Driver 2 Failure
B440 .................................................. ........ Air Mix Door Problem
B441 .................................................. ........ Cooling Fans Problem
B446 ......................................... Low A/C Refrigerant Condition Warning
B447 ....................... Very Low A/C Refrigerant Condition Warning [A/C Clutch]
B448 ...................... Very Low A/C Refrigerant Pressure Condition [A/C Clutch]
B449 ............................................ A/C High Side Temperature Too High
B450 ..................................... Coolant Temperature Too High [A/C Clutch]
B480 ......................... Loss of ABS/TCS Communication [Antilock Brake System]
B481 ............................................. Antilock Brake System (ABS) Fault
B483 ...................................... ABS/TCS Disabled [Antilock Brake System]
B552 .................................................. .. BCM Memory Reset Indicator
B556 .................................................. ............ BCM EEPROM Error
L110 ........................................... LSP Communication Failure (Allante)
L411 ................................. Lighting System Low Voltage Warning (Allante)


ABS Codes

T021 .................................................. . RF Wheel Speed Sensor Fault
T022 ......................................... RF Wheel Speed Sensor Frequency Error
T023 ........................................ RF Wheel Speed Sensor Continuity Fault
T025 .................................................. . LF Wheel Speed Sensor Fault
T026 ......................................... LF Wheel Speed Sensor Frequency Error
T027 ........................................ LF Wheel Speed Sensor Continuity Fault
T028 ............................................ Wheel Speed Sensor Frequency Error
T031 .................................................. . RR Wheel Speed Sensor Fault
T032 ......................................... RR Wheel Speed Sensor Frequency Error
T033 ........................................ RR Wheel Speed Sensor Continuity Fault
T035 .................................................. . LR Wheel Speed Sensor Fault
T036 ......................................... LR Wheel Speed Sensor Frequency Error
T037 ........................................ LR Wheel Speed Sensor Continuity Fault
T041 .................................................. . RF ABS Valve Solenoid Fault
T044 .................................................. .... RF TCS Pilot Valve Fault
T045 .................................................. . LF ABS Valve Solenoid Fault
T048 .................................................. .... LF TCS Pilot Valve Fault
T051 .................................................. . RR ABS Valve Solenoid Fault
T055 ........................................... LR Valve Solenoid Valve Fault (TCS)
T055 ................................... Rear Valve Solenoid Valve Fault (Non - TCS)
T061 .................................................. .... Motor Pump Circuit Fault
T063 .................................................. ........... Valve Relay Fault
T067 .................................................. .... Brake Light Switch Fault
T071 .......................... Electronic Brake and TCS (EBTCM/EBCM) Internal Fault
T072 .................................................. ...... Serial Data Link Fault
T073 .......................... PCM - EBTCM/EBCM Pulse Width Modulation Signal Fault
T083 .................................................. ....... Brake Fluid Level LowSIR Codes
R014 .......................................... Dual Pole Arming Sensor Disconnected
R015 ................................... Passenger Initiator Circuit Resistance High
R016 .................................... Passenger Initiator Circuit Resistance Low
R017 .............................................. Passenger Initiator Circuit Open
R018 ....................................... Discriminating Sensor Interconnect Open
R019 ...................................... Passenger Initiator Circuit Voltage High
R021 ...................................... Driver Initiator Circuit Resistance High
R022 ....................................... Driver Initiator Circuit Resistance Low
R023 ......................................... Driver Initiator Circuit Voltage High
R024 ................................................. Initiator Circuit Voltage Low
R025 ........................................... Initiator Circuit Short to Ignition
R026 ................................................. Driver Initiator Circuit Open
R028 ................................................ Current Sink Or Source Failure
R031 .......................................... Driver Loop Energy Reserve Feed Open
RO32 ............................................. Grounded 36VLR to Deployment Loop
RO33 ....................................... Steering Diode Shorted in Arming Sensor
R034 .................................... Dual Pole Arming Sensor Ignition Feed Open
R035 ......................................... Discriminating Sensor Open or Missing
R036 ....................................... Passenger Loop Energy Reserve Feed Open
RO41 ....................................... Energy Reserve Voltage Charging Failure
R042 ............................................... Loop Energy Reserve Voltage Low
R043 .................................................. ...... Driver Source Feed Low
R044 .................................................. ... Passenger Source Feed Low
R051 .................................................. ...... Frontal Crash Detected
R052 .................................................. .............. Data Area Full
R053 ............................................... Driver Side Low High Resistance
R054 ............................................ Passenger Side Low High Resistance
R055 .................................................. ........ DERM Incompatibility
R061 ................................................. SIR Indicator Circuit Failure
R062 ....................................... Redundant SIR Indicator Circuit Failure
R071 ............................... Internal Diagnostic Energy Reserve Module Fault
R075 .................................................. ......... Internal DERM Fault
R081 .................................................. .. Driver Ignition Diode Open
R082 ................................................. Passenger Ignition Diode Open
R083 .................................................. Driver Reserve Diode Shorted
R084 ............................................... Passenger Reserve Diode Shorted

TCS Codes
T021 .................................................. . RF Wheel Speed Sensor Fault
T022 ......................................... RF Wheel Speed Sensor Frequency Error
T023 ........................................ RF Wheel Speed Sensor Continuity Fault
T025 .................................................. . LF Wheel Speed Sensor Fault
T026 ......................................... LF Wheel Speed Sensor Frequency Error
T027 ........................................ LF Wheel Speed Sensor Continuity Fault
T028 ............................................ Wheel Speed Sensor Frequency Error
T031 .................................................. . RR Wheel Speed Sensor Fault
T032 ......................................... RR Wheel Speed Sensor Frequency Error
T033 ........................................ RR Wheel Speed Sensor Continuity Fault
T035 .................................................. . LR Wheel Speed Sensor Fault
T036 ......................................... LR Wheel Speed Sensor Frequency Error
T037 ........................................ LR Wheel Speed Sensor Continuity Fault
T041 .................................................. . RF ABS Valve Solenoid Fault
T044 .................................................. .... RF TCS Pilot Valve Fault
T045 .................................................. . LF ABS Valve Solenoid Fault
T048 .................................................. .... LF TCS Pilot Valve Fault
T051 .................................................. . RR ABS Valve Solenoid Fault
T055 ........................................... LR Valve Solenoid Valve Fault (TCS)
T061 .................................................. .... Motor Pump Circuit Fault
T063 .................................................. ........... Valve Relay Fault
T067 ......................... Brake Light Switch Fault (TCS Equipped Vehicles Only)
T071 .......................... Electronic Brake and TCS (EBTCM/EBCM) Internal Fault
T072 .................................................. ...... Serial Data Link Fault
T073 .......................... PCM - EBTCM/EBCM Pulse Width Modulation Signal Fault
T083 .................................................. ....... Brake Fluid Level Low


RSS Codes
S010 .................................. Left Front Damper Solenoid Valve Short to B+
S011 ......................... Left Front Damper Solenoid Valve Short to Ground/Open
S015 ................................. Right Front Damper Solenoid Valve Short to B+
S016 ........................ Right Front Damper Solenoid Valve Short to Ground/Open
S020 ................................... Left Rear Damper Solenoid Valve Short to B+
S021 .......................... Left Rear Damper Solenoid Valve Short to Ground/Open
S025 .................................. Right Rear Damper Solenoid Valve Short to B+
S026 ......................... Right Rear Damper Solenoid Valve Short to Ground/Open
S027 .............................................. Right Rear Solenoid open circuit
S030 ................................................ Speed Sensitive Steering Fault
S035 ............................... Electronic Level Control Compressor Short to B+
S036 ...................... Electronic Level Control Compressor Short to Ground/Open
S037 ............................ Electronic Level Control Exhaust Valve Short to B+
S038 ................... Electronic Level Control Exhaust Valve Short to Ground/Open
S043 .................................................. .......... Speed Signal Fault
S044 .................................................. ... Lift or Dive Signal Fault
S050 .......................................... Road Sensing Suspension Module Fault
S055 .......................................... Resistor Module Short to Ground/Open
S060 .............................................. Left Front Position Sensor Fault
S061 ............................................. Right Front Position Sensor Fault
S062 ............................................... Left Rear Position Sensor Fault
S063 .............................................. Right Rear Position Sensor Fault
S064 ........................................ Left Front Position Sensor Overcurrent
S065 ....................................... Right Front Position Sensor Overcurrent
S066 ......................................... Left Rear Position Sensor Overcurrent
S067 ........................................ Right Rear Position Sensor Overcurrent
S070 ................................................ Left Front Accelerometer Fault
S071 ............................................... Right Front Accelerometer Fault
S072 ................................................. Left Rear Accelerometer Fault
S073 ................................................ Right Rear Accelerometer Fault
S074 .......................................... Left Front Accelerometer Overcurrent
S075 ......................................... Right Front Accelerometer Overcurrent
S076 ........................................... Left Rear Accelerometer Overcurrent
S077 .......................................... Right Rear Accelerometer Overcurrent


PCM Data display

PD01 (ED01) TPS (Throttle Position Sensor) in degrees
PD02 (ED02) Manifold Absolute Pressure Sensor in Kilo Pascals (kPa)
PD03 (ED03) Barometric Pressure in kPa
PD04 (ED04) Engine Coolant Temperature (ECT) sensor in degrees Celsius
PD05 (ED05) Intake Air Temperature (IAT) sensor in degrees Celsius
PD07 (ED07) EGR Pintle Position
PD08 (ED08) Spark Advance in degrees Before Top Dead Center (BTDC)
PD09 (ED09) Ignition Ground Voltage
PD10 (ED10) Fuel Pump Feedback Voltage (battery voltage)
PD11 (ED11) Engine Speed in revolutions per minute (rpm)
PD12 (ED12) Vehicle Speed in miles per hour (mph)
PD13 (ED13) Pintle Position
PD15 (ED15) Ignition 1 Voltage
PD16 (ED16) PCM Output Fault Status A
PD17 (ED17) PCM Output Fault Status B
PD19 (ED19) Power Steering Sensor (kPa)
PD30 (ED30) Front Bank Injector Pulse Width in milliseconds (ms)
PD31 (ED31) Rear Bank Injector Pulse Width in milliseconds (ms)
PD32 (ED32) Front Oxygen Sensor Voltage
PD33 (ED33) Rear Oxygen Sensor Voltage
PD34 (ED34) Front Oxygen Sensor Cross Counts (per second)
PD35 (ED35) Rear Oxygen Sensor Cross Counts (per second)
PD36 (ED36) Front Short Term Fuel Trim
PD37 (ED37) Rear Short Term Fuel Trim
PD38 (ED38) Front Long Term Fuel Trim
PD39 (ED39) Rear Long Term Fuel Trim
PD40 (ED40) Knock Sensor Spark Retard in degrees
PD41 (ED41) Knock Sensor
PD42 (ED42) Octane Level of Fuel will display 0, 87, 90, or 93
PD69 (ED69) Cruise Lash
PD70 (ED70) Cruise Control Feedback (percent)
PD71 (ED71) Transaxle Pressure Switch (PRNDL Code)
PD72 (ED72) Transaxle Input Speed in rpm (PRNDL P/N Sw)
PD73 (ED73) Torque Converter Slip Speed in rpm
PD74 (ED74) TPC Solenoid Current
PD75 (ED75) Current ER
PD76 (ED76) Transaxle Gear Ratio
PD77 (ED77) Transaxle Oil Temperature in degrees Celsius
PD78 (ED78) Transaxle Shift Adapt in pounds per square inch (psi)
PD80 (ED80) Transaxle Garage Shift Adapt in seconds
PD81 (ED81) Torque Converter Clutch (TCC) Solenoid Duty Cycle in percent
PD82 (ED82) Transaxle Shift Time in seconds
PD83 (ED83) Non-drive Wheel Speed in kph
PD84 (ED84) Brake Booster Vacuum in kPa
PD97 (ED97) PROM Calibration-Transaxle
PD98 (ED98) Ignition Cycles (key cycles on/off)
PD99 (ED99) PROM Calibration-Engine