DTC 1122 & 0122 TPS on a 2000 LS1

Have a friend that I was diagnosing an intermittent idle spike from about 900 to 1400.

It's throwing a DTC 0122 & 1122, do y'all think the sensor is just toasted?

bueler, bueler, bueler, anyone, anyone, anyone...

I guess no one has ever had this problem.

They are all TPS codes - low voltage or intermittent low voltage. Perhaps the idle needs to be tuned. The high spark peak is due to a choppy idle and is caused by the Idle Underspeed/Overspeed spark tables. It will peak/trough at +/-9* depending how far out the Idle RPM is from the deisred Idle RPM.

Quote:

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Originally Posted by MNR-0

They are all TPS codes - low voltage or intermittent low voltage. Perhaps the idle needs to be tuned. The high spark peak is due to a choppy idle and is caused by the Idle Underspeed/Overspeed spark tables. It will peak/trough at +/-9* depending how far out the Idle RPM is from the deisred Idle RPM.

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Thanks,

I"ll look into the Idle RMP tables and see what I can figure out. :)