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OBD:P2137/P2136 Throttle/Pedal Position Sensor check engine
I got a check engine light with the following error codes P2137/P2136 (Throttle/Pedal Position Sensor/Switch/BC and A/C voltage correlation. What does this mean?
I tried this little temporary fix below, but it did not seem to clear the check engine light. Just curious on how serious this fix is to get completed. I have 62K miles1. Turn the key to ON position. Position II that is. Don't start the car.
2. Press and hold the gas pedal for at least five seconds. Keep the pedal pressed.
3. Turn ignition off but do not remove the key. Now release the gas pedal.
4. Remove key. Wait a minute before you restart your Mercedes.
Try the fix described above. (Sounds like a re-calibration procedure).
Typically, electronic throttle pedals have several different position sensors, for example, one that increases in resistance with added throttle, one that decreases, and a third with a different rate of change, When the ECM detects a difference in the reported position between any of them, it sets a code. Voltage issues, connection issues, or an internal fault can all cause the code.
My 2014 glk 350 has p2136 and p2137 codes. No driving issues but the code is intermittent. I replaced the gas pedal/sensor and it still is there. Any idea what the issue is? It only has 30k miles
Typically the sensor(s) is indicating a problem, and it's not the sensor itself usually. Perhaps a connector is loose, or some other issue is going on.
Clear the code(s) and see under what conditions they come back.
Typically the sensor(s) is indicating a problem, and it's not the sensor itself usually. Perhaps a connector is loose, or some other issue is going on.
Clear the code(s) and see under what conditions they come back.
You’re referring to the accelerator connector, correct? The check engine light would turn off after turning off and turning it back on immediately. It’s totally random, nothing specific triggers the code to come on, just normal driving.
John CC, I think you might be heading in the right direction. Looking back at the codes shown, it mentions Correlation between the two. Could it be possible the throttle position sensor is suspect? It was also mentioned that the issue happens during normal driving.
Mention of a TPS always brings me back to an issue a buddy had with a TPS in a Honda civic. The engine would stumble at a precise throttle position. Either side of it was just fine. I believe it was a resistive sensor and the mechanic only found the issue by using a multimeter to check I the resistance of the TPS as it moved across it's full range. There was a specific position where there was a blip in resistance. Changed the TPS and issue solved. He measured between the end of the variable resistor and the wiper. Did this on each end of it to confirm.
Maybe a *similar* (but probably not *exactly* the same) issue here?
I don't know what my thought process was back in April of last year (I don't know what it was yesterday!) but, looking back at the code descriptions today, I think it's indicating there are three different variables in the throttle pedal sensor and that the ECM is detecting an inconsistency between C and the other two, A and B. C is the outlier, and is assumed to be the one that is incorrect, since there is no correlation error reported between A and B.
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