I finally got a code reader again and pulled the codes from my truck:

P0238- Turbo Boost Sensor A Circuit High Input
Never seen this one before. Don't know what it means.

P0470- Exhaust Back Pressure Sensor Circuit Error
Never seen this before. The tube and sensor were cleaned about a year ago.

P0743- Torque Convertor Clutch System Electrical Failure
Never seen this before. Could this be caused by the manual TC lock up switch I installed? This one has me a little worried.

I also got the P0541(I removed the IAH) and the P1211(caused by the chip)

I used a Superchips tuner to pull the codes. The three I listed I haven't seen with my truck before, though it has been over a year since I have pulled the codes. The one that concerns me most is the TC code.

 

Possible causes:
P0238 Circuit short to power, bad MAP sensor
P0470 Biased sensor, open signal return
P0743 Faulty solenoid, circuit, PCM (most likely due TC lock up switch, if TC is functioning normally; would be stalling with brake applied in D or 2, or there would be no TC lock up)

 

If it's been a year, I think I would clear them, run the truck for a few hundred miles and see if any comes back.

 

I agree with Barry. I overlooked about the 'over a year ago' part.

 

Thanks Roland and Barry.

 

No problem, let us know if any comes back..

 

After a couple hundred miles, these are the only 3 codes that came back. Looks like the EBPS might be bad?


P0470- Exhaust Back Pressure Sensor Circuit Error
Never seen this before. The tube and sensor were cleaned about a year ago.


I also got the P0541(I removed the IAH) and the P1211(caused by the chip)

 

Make sure the plug is on good and tight..