P2135 and rebuilt transmission
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P2135 and rebuilt transmission
2011 Chevy Malibu LT, 2.4 L9, 160k
This issue is causing me to lose sleep. This is my son-in-laws car. We had the trans rebuilt in Feb 2021, the second time in 4 years. A week after picking up the car, the car started started to throw a P2135, Throttle Body Sensor. Then like normal it will go into limp mode and the traction control warning would come on. Searching the net show lots of these. I replaced the Throttle Body using a cheaper Amazon unit and immediately it threw the code again. I bought a GM authorized one (this model you have to replace the entire Throttle Body, not just the sensor) and it threw the code again. I have gone threw the Throttle Re-learn, both manual and using my scan tool. I went through all of the wires and connectors. Unwrapped them, checked them, re-wrapped them. Saw somewhere that the Negative Battery cable forming bad ground caused such issues and replaced it.
Things that I have noticed:
One time, I reset the codes, did a throttle body re-learn and when I happened, I just cleared the code and continued driving. I drove the car for a week, put on 160 miles, dozens of stops and starts and one trip was 90 mile highway/city with multiple stops. Temp range outside went from 25 to 60. All the while I had my scan tool connected and I was recording the data stream each time I went out (no matter how short a trip) trying to capture when it happened. It never did it. I figured it was possible that after doing the TPS re-learn was set, it throws the code, you reset it and keep driving while it learns (something I read online as possible). I gave the SIL back his car. Three days later, it threw the code again. Same thing, P2135 with traction control in limp mode. I tried to replace the accelerator pedal (which has its sensor, again because of a possibility I read). This was a GM part. Each time I plugged the accelerator pedal in I would get a P2137 dealing with sensor 2's voltage being 2 low. Watching the datastream, the senor was putting out and initial .25 volts at idle (increasing as you push down on the pedal), but the other pedal was putting out an initial .47v. I don't find any form of accelerator pedal re-learn. I am at a lose.
I haven't taken back to the trans shop because that traction control/power lose mode is common when codes are thrown and I can't prove anything is wrong with the trans. He is unemployed right now and the whole thing has already cost me a lot of money. Am I missing something? Could it be the computer needs to be re-flashed with more current code and doesn't tolerate the wider ranges in the TPS or accelerator pedal? Could it really be the traction control screwing up in the trans causing the TPS to throw a code (something else that I appear to see might be possible) In which case it would be the trans. When the Traction Control kicks in and it can't identify the trans serial number, would that cause it? I have deliberately taken it it for a ride over every bump and speed bump I can find and nothing happened. I am tired of read articles. Anyone have anything concert that could help me?
This issue is causing me to lose sleep. This is my son-in-laws car. We had the trans rebuilt in Feb 2021, the second time in 4 years. A week after picking up the car, the car started started to throw a P2135, Throttle Body Sensor. Then like normal it will go into limp mode and the traction control warning would come on. Searching the net show lots of these. I replaced the Throttle Body using a cheaper Amazon unit and immediately it threw the code again. I bought a GM authorized one (this model you have to replace the entire Throttle Body, not just the sensor) and it threw the code again. I have gone threw the Throttle Re-learn, both manual and using my scan tool. I went through all of the wires and connectors. Unwrapped them, checked them, re-wrapped them. Saw somewhere that the Negative Battery cable forming bad ground caused such issues and replaced it.
Things that I have noticed:
- Almost always happens within approx 1 mile of initial driving
- The Traction Control Code says 'unknown serial number'
- Always happens at lower speed, usually during take off.
- I would relearn, reset the codes and drive it for 5-7 miles and it would work. I would give it to him and it would throw the code the next day. He DOES drive like a little old lady. The code HAS been thrown on me. To my memory it was always always at take-off or slow speeds, like rounding a curve in the subdivision.
One time, I reset the codes, did a throttle body re-learn and when I happened, I just cleared the code and continued driving. I drove the car for a week, put on 160 miles, dozens of stops and starts and one trip was 90 mile highway/city with multiple stops. Temp range outside went from 25 to 60. All the while I had my scan tool connected and I was recording the data stream each time I went out (no matter how short a trip) trying to capture when it happened. It never did it. I figured it was possible that after doing the TPS re-learn was set, it throws the code, you reset it and keep driving while it learns (something I read online as possible). I gave the SIL back his car. Three days later, it threw the code again. Same thing, P2135 with traction control in limp mode. I tried to replace the accelerator pedal (which has its sensor, again because of a possibility I read). This was a GM part. Each time I plugged the accelerator pedal in I would get a P2137 dealing with sensor 2's voltage being 2 low. Watching the datastream, the senor was putting out and initial .25 volts at idle (increasing as you push down on the pedal), but the other pedal was putting out an initial .47v. I don't find any form of accelerator pedal re-learn. I am at a lose.
I haven't taken back to the trans shop because that traction control/power lose mode is common when codes are thrown and I can't prove anything is wrong with the trans. He is unemployed right now and the whole thing has already cost me a lot of money. Am I missing something? Could it be the computer needs to be re-flashed with more current code and doesn't tolerate the wider ranges in the TPS or accelerator pedal? Could it really be the traction control screwing up in the trans causing the TPS to throw a code (something else that I appear to see might be possible) In which case it would be the trans. When the Traction Control kicks in and it can't identify the trans serial number, would that cause it? I have deliberately taken it it for a ride over every bump and speed bump I can find and nothing happened. I am tired of read articles. Anyone have anything concert that could help me?
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