Ok, had the headgaskets replaced, changed water pump, and belts, all hoses checked, thermostat replaced, and car runs great except for at times, the temperature gauge will shut over to 3/4 for 2-3 minutes, then go back to the 1/2 way mark. Took back to the mechanic, and burped the system again. Drove for 4 days 100 miles a day with no problems. Yesterday driving fine, and all of a sudden, boom, shoots over to hot, says a/c is shut off, engine hot. Immediately pulled over, let cool for 5 minutes restarted, and then it was fine. Let run for over a half hour sitting with it in gear, no problems?

I ran the codes because the service engine light is on, the abs, and traction control, and here are the results:


B1310-Ambient air Temperature Sensor Failure-Current
C1255- EBTCM Internal malfunction-Current
P1645-Evaporative Emission Purge Solenoid Control Circuit_History


Any help or advice on this would be greatly appreciated. Thanks in advance. I even reset the codes, service engine light would go off, then came back on, and now even if I clear codes, still stays on.

 

Is there anything it particular going on when it happens? Northstars are a little scary in regards when head gaskets are replaced there is always a chance it wont work even when 'time-sert'ed. It might be worth having CO test, to be sure engine is still sound.

 

No car is driving fine, just drove it over 100 miles with no problems for overheating?