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OBDII Diagnostic Codes for 96 Northstar ???

Cadillac Deville The flagship luxury car, offering the class with which the Cadillac has been associated, for decades

OBDII Diagnostic Codes for 96 Northstar ???

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  #1  
Old 09-19-2006, 03:57 PM
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Default OBDII Diagnostic Codes for 96 Northstar ???

Where can I find the complete lists of OBCII Codes for my 96 Deville with a Northstar.

I get a P1139 and it does not show up on my generic list?

 
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  #2  
Old 09-19-2006, 07:55 PM
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Default RE: OBDII Diagnostic Codes for 96 Northstar ???

DTC P1139 HO2S Insufficient Switching Bank 1 Sensor 2

The reason you cannot find it is because it is not a generic OBDII code.

P = powertrain
1 = manufacture specific code. 0 = OBDII generic
1 = system area(fuel, ignition, trans ect.)
39 = code description

A P0139 would set for the same problem, but a manufacture code may set before an OBDII code because the manufacture has a more specific set of parameters for trouble shooting a specific problem.

Hope this helps.
 
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  #3  
Old 09-21-2006, 02:33 PM
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Default RE: OBDII Diagnostic Codes for 96 Northstar ???

FLCaddytech,

Thanks, Now I have another question. How do I know which sensor is Bank 1, Sensor 2.

I assume that there are four sensors. Two on each bank.

Regards, Mike

 
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  #4  
Old 09-21-2006, 10:58 PM
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Default RE: OBDII Diagnostic Codes for 96 Northstar ???

Bank 1 refers to the #1 cylinder bank (rear in this case)
Sensor 2 would be the second sensor downstream from the head.

Your car could have 3 or 4 sensors, just follow the rear exhaust manifold.
It will have 1 o2 sensor where the 4 runners join together.
It may have 1 after the "Y" and 1 after the converter (4 sensor system)or just 1 after the converter (3 sensor system).

Hope this helps.
 
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  #5  
Old 09-21-2006, 11:01 PM
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Default RE: OBDII Diagnostic Codes for 96 Northstar ???

Sometimes when i am unsure of an o2 sensor location i unplug one and see what new codes set.
 
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  #6  
Old 10-09-2006, 06:37 PM
Join Date: Oct 2006
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Default RE: OBDII Diagnostic Codes for 96 Northstar ???

Make sure u reset codes agter that, dont buy them from autozone, i did once and had to exchange them later
 
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