4 Codes - PCM?

[noreasonwhyy]

Hey guys,

Throwing four codes and I'm beginning to think it is a bad ground connection. Do the MAP, TPS and CPS utitlize the PCM for ground on 97 GTs? Or could it be a loose connector?

P0107 MAP sensor high input
P0108 MAP low input
P0121 TPS circuit
P0336 CPS circuit

 

[jteske88]

you map sensor harness bad? or its shot.

 

[BillBoost37]

Pop the loom from the radiator to the map/tps and see if you find a ground splice. If not, then it's getting ground from right by the ICM.

 

[noreasonwhyy]

Thanks for the replies. I've found the ground and was as clean as can be. Should I be looking into a new ICM, ICM harness, or what?

 

[BillBoost37]

No, you should diagnose the issue. At least, that's what I would do.

Check the voltage and grounds to the various sensors. Trace them back if necessary. Check your battery cable connections for corrosion or being loose.