I have a 2012 Chrysler 200 with a 4-cylinder. Within the last 2 weeks the ETC (electronic throttle control) light has been coming on intermittently. Sometimes the traction control light comes on when the ETC light comes on and sometimes it's just the ETC light. The check engine light is not on and there are no stored codes except for 2 in the ABS system. Those codes are C121C (Torque Request Signal Denied) & U0401 (Implausible Data Received from ECM/PCM). I cleared them a day ago but they have not returned yet even though the ETC light has come on since. When the ETC light comes on, you can tell the throttle is limited and power is affected. The system seems to regain control and return to normal regardless of whether you lift your foot off the accelerator pedal when just the ETC light comes on. When the traction light comes on with the ETC light, which seems to happen only when my wife is driving, she will pull the car over, shut the car off and restart it in an attempt to get the vehicle back in normal mode. Not sure if that is necessary or if the car will snap out of the faults on its own if you're a little more patient with it. The problems seem to occur on both hills and level grades. The battery is brand new within the past week, thanks to the fact that in order to check it and the connections, I had to remove the wheel, inner fender and some bracketry so I just decided to replace it with a brand new factory battery instead of putting a 6 year old battery back in.
I have looked on the forums and it seems most people get some check engine codes, which I am not (other than the 2 ABS codes). I've read where some have replaced the ETC and the problem seemed to go away while others it did not seem to make any difference. Our car only has 70,000 miles so I find it hard to believe that the ETC, PCM or ABS module are failing. Not impossible but I would like to think the quality is better and the parts will get more life before they have issues. We live in NE Ohio so we have seen our share of really cold temperatures as well as a caustic environment due to the chemicals used to melt the snow and ice. This makes me think that I should be checking connections, wiring and grounding.
Because the traction light comes on sometimes I also think that I should look at ABS sensors or wheel speed sensors since it appears the vehicle thinks a wheel is slipping and in an effort to regain control limits the throttle. If I have an intermittent issue in this area I could see where sometimes I see a traction light and others I do not. I should get my hands on a dealer type scanner tomorrow so I can monitor the ABS system in real time to see if I have an issue there. I'm thinking maybe a "lazy" sensor or something that wouldn't necessarily throw a code as a specific ABS sensor for specific wheel but still cause the ETC to act up.
A few questions, is there a common connection or ground that will cause these symptoms? Are there any other components or sensors that I should look at that might be giving bad inputs to the PCM to cause the ETC light to come on and act up? Are there any tests that I can do to eliminate certain components?
Thank you for your help!
I have looked on the forums and it seems most people get some check engine codes, which I am not (other than the 2 ABS codes). I've read where some have replaced the ETC and the problem seemed to go away while others it did not seem to make any difference. Our car only has 70,000 miles so I find it hard to believe that the ETC, PCM or ABS module are failing. Not impossible but I would like to think the quality is better and the parts will get more life before they have issues. We live in NE Ohio so we have seen our share of really cold temperatures as well as a caustic environment due to the chemicals used to melt the snow and ice. This makes me think that I should be checking connections, wiring and grounding.
Because the traction light comes on sometimes I also think that I should look at ABS sensors or wheel speed sensors since it appears the vehicle thinks a wheel is slipping and in an effort to regain control limits the throttle. If I have an intermittent issue in this area I could see where sometimes I see a traction light and others I do not. I should get my hands on a dealer type scanner tomorrow so I can monitor the ABS system in real time to see if I have an issue there. I'm thinking maybe a "lazy" sensor or something that wouldn't necessarily throw a code as a specific ABS sensor for specific wheel but still cause the ETC to act up.
A few questions, is there a common connection or ground that will cause these symptoms? Are there any other components or sensors that I should look at that might be giving bad inputs to the PCM to cause the ETC light to come on and act up? Are there any tests that I can do to eliminate certain components?
Thank you for your help!