CEL and codes

[Topless]

Clear the codes and see if they come back. I had a similar issue with oddball error codes after replacing my battery. When voltage to the DME went to zero it caused a hickup . I cleared them and they did not return.

Since your car was damaged in an accident it may also be a damaged sensor harness or DME harness. You can trace the wires and see if there are any chaff points or loose connectors.

[Overdrive]

I am wondering if maybe the throttle position codes have to do with the car relearning after the battery got disconnected, but it's had a good few hundred miles put on it since then, and about 90 miles since the MAF replacement and clearing of the codes at that time.

If I swap banks with the O2 sensors, should I clear the codes or simply scan and see if the error switches sides? Just want to know if I should set time aside for another near 100 mile drive to bring the codes back up.

[Jager]

You will have to clear the codes after swapping the O2 sensors, then see what happens after a few miles.

[Overdrive]

Ok, time for a bit of an update.

Haven't done any 02 bank swapping, but did use the code reader again to reset the light and see if it comes back. This time I'm reading 8 codes, some being repeats from before, but here they are:


P1117 Oxygen Sensor Heating 1 After Catalytic Converter - Below Lower Limit

P1121 Oxygen Sensor Heating 2 After Catalytic Converter - Below Lower Limit

P1124 Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Rich Threshold

P0140 Oxygen Sensor After Catalytic Converter (cylinders 1 - 3) - Interruption of Signal

P0410 Secondary Air Injection System - Signal Implausible (Cylinders 1-3)

P1126 Oxygen Sensing Adaptation Area 1 (Cylinders 4-6) - Rich Threshold

P1411 Secondary Air Injection System - Signal Implausible (Cylinders 4-6)

P0160 Oxygen Sensor After Catalytic Converter (Cylinders 4-6) - Interruption of Signal

[mikefocke]

the MAF revision wasn't the same as the ECU flash expected.

there is a loose connection from the wiring harness to the ECU.

I'm assuming everything is stock?

[Overdrive]

Yes, Mike, the car's 100% stock (if you exclude my having to replace the top), and the only modification has been an IMS retrofit and RMS replacement. I listed all work done to date a few posts earlier in this thread.

How should I go about tackling the harness issue? Just go find it and make sure it's all snug and plugged or does it require full replacement? Any chance this loose connection might also be causing the flickering/dimming of all of my car's lights (interior & exterior) and cutting out of stereo sound while running? The ignition switch has been replaced with no change in the symptoms.

[Overdrive]

Update: The CEL came back on very quickly yesterday after the reset, within a few hours and maybe about 20 miles or less of driving. Only 6 of the 8 codes came back up, and I believe it was 1126 and 0410 that did not come back.