Code 22

[ZeroCool8891]

ok guys i have an SES light on. i pulled the codes and got a code 22. i looked it up and i got this "TPS voltage was under 0.2 volts for 3 seconds when the engine was running". bascily it means from what i was told that the TPS is under the .2 volts that it should be. now i check it out and thats deff the problem, i used a volts meter and the wires are under .2 my question is how do i fix this, i dunno if its a switch or a relay or a fuse or what i got most of the problum slove just need to know how to fix.

Thanks

Oh BTW its my 88 iroc 350 tpi

[sweetbmxrider]

the throttle position sensor had low voltage? maybe its a bad tps?

[ZeroCool8891]

i replaced it with a bradn new because that was the 1st thing i was told, im getting the same code.

[sweetbmxrider]

brand new or rebuilt? check the voltage. could be the computer

[ZeroCool8891]

brand new, that computer is also brand new, rite from GM themselfs, but how do i check the computer try another or something.

[sweetbmxrider]

nah you should be able to measure the voltage but i don't know off hand what it should be

[IROCdan330]

why dont you check power/ground directly at the sensor, then output from the computer? try to diag from there based on your results.

one should be 5 volt power, one should be ground, one should be signal aka variable voltage dependant on throttle position.

.49-.51 is just about perfect for idle.

4.5 is generally WOT.

These sensors are adjustable...perhaps you moved it too far one way. try and adjust it to .51v with the throttle closed...

[ZeroCool8891]

ok cool ill try all of that.

Thanks guys

[sweetbmxrider]

yeah i wasn't sure if the voltages were different for tpi for some reason

[ZeroCool8891]

ok i tried everything that was told to do, i ask a few people at work they might have said a wire was bad i checked them all they where all fine, the tps is brand new, the computer is brand new, everythins is where it should but i still get that code. im all out of ideas anything else that can be done.

[Slow96LT1]

make sure there a 5 volt ref to the sensor with the sensor disconected and the key on normaly the gray i think

[ZeroCool8891]

well i found out what the prob is, sice my car sat for about 10+ year before i got it, and i drove it with the org drivetrain in it and change everything over. so me and a few friends might beleace its something in the engine harness becasue i have other issues, so im looking out for a cheap harness witch asctully i might have found, and sice my camaro is an late 88 model means, i have vats and no 9th injector and 88 was the last year of having no vats and a 9th injector, so i would need one fron an 89 witch i have found, i will try it over and replace some sesners witch need to get replaced anyway. ill keep you all posted on the progress.