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Well, the P0122 will still come on briefly and then go away. Driving isn't affected, so at this time I'm going to leave it alone. If that changes I'll give it a go again.
I imagine what's happening is the sensor is operating within normal range but close enough to the border of a code being flagged that the code will pop up periodically without there being a real problem. Kind of like when your catalytic converter is operating at 95% efficiency and occasionally drops to 94%, triggering a code.
Last edited by coryforsenate; 03-15-2018 at 07:44 PM.
Sounds like you have a bad batch of sensors. If it progressively gets worse again, you might go somewhere else for a new one.
That's what I'm thinking. I normally heavily recommend the ACDelco OEM line of parts but they must have a gerbil doing the QC for the throttle position sensors. I've still got some sensors leftover from Advance Auto's mistake of sending of 6 but if I run through those I'm getting a different brand, like Wells.
TheNutDriver, I think one of the sensors had right at 0.50 at closed but I can't find my paper with notes, might've gotten thrown away. When I looked up the voltage for my specific vehicle, I kept finding it should be about 0.60 for closed throttle.
If it regresses back to the same problem I'll compare the voltages on the 3 sensors I have left.
Last edited by coryforsenate; 03-16-2018 at 10:27 PM.
Well, it's back again along with all the driveability issues like rough shifts and rough idle. Tried another one of the new ACDelco OEM sensors and no change. Time to troubleshoot again...
Just humour me and try setting it to 0.50 at idle and see what happens. Your symptoms are exactly what I had 18 months ago. In the end the only tps I could find which came good quality was a standard motor products one. All others were junk right out the box including AC Delco professional ones. Once I got rid of my 0.7v idle and had a decent sensor my fault code cleared and never came back and my shifts were once again smooth.
TheNutDriver, I'll give you a whole comedy show. I did say if it came back that'd I'd try your suggestions.
How do I set the voltage at idle? The sensor for my vehicle is not adjustable like more modern vehicle (mine's a '96). There's a pin (circled in red) that fits into a hole and the fit is rigid. That's not the exact sensor but other than that little metal pin sticking out of the metal circle, it's identical.
I did do some data logging while driving home from work. Like previously, the TPS closed (e.g. stop sign) will bounce around between 0% and 2-3%.
Last edited by coryforsenate; 03-21-2018 at 08:28 PM.
I found the TPS from Standard Motor Products on Amazon for my vehicle. I'd be willing to try one from them out. It's actually a little cheaper than ACDelco, Dorman, and Wells.
So, the latest new one I put on yesterday is working now (for now). I've got a modded one with that pin removed and the holes widened to swap in if (or when) it goes to crap.
So multiple AC Delco oem throttle position sensors later, turns out they were all defective. Some worked for a couple days, some didn't work ever. I was able to try 6 of them because Amazon sent me one box of six sensors instead of just one sensor. All bad.
Whatever factory Acdelco hired to make their TP sensors is doing a $%@! job with quality control.
I got a Wells sensor. Heard good things about them. Instantly started working perfectly. My truck hasn't run this smoothly in a long time. No shuddering, high idles, rough shifting. Everything is like butter.
What was the issue with the Delco ones? Not sure exactly but scanner hookup showed all of them had a jiggle of about +/- 3% of the signal at idle. I don't know if that's normal but strolling around town is around 20-30% of signal so that error is a decent chunk of the signal.
Last edited by coryforsenate; 07-12-2018 at 07:35 PM.
So multiple AC Delco oem throttle position sensors later, turns out they were all defective. Some worked for a couple days, some didn't work ever. I was able to try 6 of them because Amazon sent me one box of six sensors instead of just one sensor. All bad.
Whatever factory Acdelco hired to make their TP sensors is doing a $%@! job with quality control.
I got a Wells sensor. Heard good things about them. Instantly started working perfectly. My truck hasn't run this smoothly in a long time. No shuddering, high idles, rough shifting. Everything is like butter.
What was the issue with the Delco ones? Not sure exactly but scanner hookup showed all of them had a jiggle of about +/- 3% of the signal at idle. I don't know if that's normal but strolling around town is around 20-30% of signal so that error is a decent chunk of the signal.
Do you have the part number of the Wells Sensor? I've looked on Amazon and there are thousands... Oh wait, you said you had a truck. I have a 2000 Trans Am.
03-15-2018, 07:23 PM
