ESP EPC & Engine Light ON
#21
Before doing that, would you perform engine basic setting 103 and 140 and post the result here. They are fuel pressures and adaptation values of low and high fuel pressure systems. Post the data before and after low pressure system pressure sensor G410 replacement.
#22
Hey guys, this is quite an irritating issue. I'm having the same issue with my c6 a6.. This has been haunting the car for at least 6 months now and I'm quite frankly, am about to give up on it.
Here is a shot of the problem we've seen in VAGcom:
http://s8.postimage.org/k7zml1zjn/20111124_134215.jpg
It is generally an EPC problem. I will be able to drive it for a while, sometimes an hour, sometimes only 20 minutes and then the EPC light comes up, engine shakes, RPM goes to 1-2t RPM on its own, gas pedal sometimes works, sometimes don't, in a nutshell, it goes limp mode. (but not just underpowered limp mode, sometimes i cannot throttle - but I wait it out, 5-10 minutes, then limp it back home.)
*20-1 hour drive is less than 20 km but traffic is bad in this part of the world.
I have been reading alot in the net specificaly this thread:
http://www.audizine.com/forum/showth...ausible-Signal
We have done all adaptation needed.
We have changed 2 things: the throttle body (brand new), and the ECU (again, brand new) - they were not fried previously, but you know how dealerships go about this. they just change and change. if they fixed the problem, i couldn't care less. but here I am 6 months later and it is still having this problem.
Any advice where I should start now? Am I left with changing the engine wiring harness?
For the record: my car is an 05 audi a6, c6 body, 3.0 liter (non-turbo), CVT 7 speed tranny. it is completely bone stock.
Here is a shot of the problem we've seen in VAGcom:
http://s8.postimage.org/k7zml1zjn/20111124_134215.jpg
It is generally an EPC problem. I will be able to drive it for a while, sometimes an hour, sometimes only 20 minutes and then the EPC light comes up, engine shakes, RPM goes to 1-2t RPM on its own, gas pedal sometimes works, sometimes don't, in a nutshell, it goes limp mode. (but not just underpowered limp mode, sometimes i cannot throttle - but I wait it out, 5-10 minutes, then limp it back home.)
*20-1 hour drive is less than 20 km but traffic is bad in this part of the world.
I have been reading alot in the net specificaly this thread:
http://www.audizine.com/forum/showth...ausible-Signal
We have done all adaptation needed.
We have changed 2 things: the throttle body (brand new), and the ECU (again, brand new) - they were not fried previously, but you know how dealerships go about this. they just change and change. if they fixed the problem, i couldn't care less. but here I am 6 months later and it is still having this problem.
Any advice where I should start now? Am I left with changing the engine wiring harness?
For the record: my car is an 05 audi a6, c6 body, 3.0 liter (non-turbo), CVT 7 speed tranny. it is completely bone stock.
#23
Hello I have the exact same issue can you please be specific into what electical realy the dealer had ordered for you and if I solved your problem. you can email me at rickabdelqader@gmail.com thank you very much appriciated
#24
Hello I have the exact same issue can you please be specific into what electical realy the dealer had ordered for you and if I solved your problem. you can email me at rickabdelqader@gmail.com thank you very much appriciated
The measuring blocks seem to indicate that the throttle position sensor (TPS) is out of phase between the two TPS's.
Look forward to any thoughts. Thanks!
#25
Seems like I am having the same problem. It started today all of a sudden I lost power. Then my ESP light came on. Shuddered all the way to work then wouldn't start after work, I had to jump it. Ran terrible, smoking out of tail pipes a lot on the way home. ESP light came on again then engine light started blinking. I have Vag Com, but don't know how to use it other than scanning for codes. Really hoping for some help here. Anyone got anything?
#26
I have the same problem that just started lately on my 2006 Avant. Same symptoms, ESP, EPC, CEL lights up, rough idle... I can usually stop the car, turn engine off, then restart. If that doesn't work the 1st time, the second cycle usually does the trick. Strange that this seems to be a common occurrence but yet no one has found a resolution thus far?
#27
I had similar symptoms recently. Sent it to dealer since I bought an aftermaket warranty. They replaced a few things like an O2 sensor, coilpack (for the cylinder that had a misfire) and an engine relay. But the part that fixed it was the high pressure fuel pump. YMMV
#28
Hey guys, this is quite an irritating issue. I'm having the same issue with my c6 a6.. This has been haunting the car for at least 6 months now and I'm quite frankly, am about to give up on it.
Here is a shot of the problem we've seen in VAGcom:
http://s8.postimage.org/k7zml1zjn/20111124_134215.jpg
It is generally an EPC problem. I will be able to drive it for a while, sometimes an hour, sometimes only 20 minutes and then the EPC light comes up, engine shakes, RPM goes to 1-2t RPM on its own, gas pedal sometimes works, sometimes don't, in a nutshell, it goes limp mode. (but not just underpowered limp mode, sometimes i cannot throttle - but I wait it out, 5-10 minutes, then limp it back home.)
*20-1 hour drive is less than 20 km but traffic is bad in this part of the world.
I have been reading alot in the net specificaly this thread:
http://www.audizine.com/forum/showth...ausible-Signal
We have done all adaptation needed.
We have changed 2 things: the throttle body (brand new), and the ECU (again, brand new) - they were not fried previously, but you know how dealerships go about this. they just change and change. if they fixed the problem, i couldn't care less. but here I am 6 months later and it is still having this problem.
Any advice where I should start now? Am I left with changing the engine wiring harness?
For the record: my car is an 05 audi a6, c6 body, 3.0 liter (non-turbo), CVT 7 speed tranny. it is completely bone stock.
Here is a shot of the problem we've seen in VAGcom:
http://s8.postimage.org/k7zml1zjn/20111124_134215.jpg
It is generally an EPC problem. I will be able to drive it for a while, sometimes an hour, sometimes only 20 minutes and then the EPC light comes up, engine shakes, RPM goes to 1-2t RPM on its own, gas pedal sometimes works, sometimes don't, in a nutshell, it goes limp mode. (but not just underpowered limp mode, sometimes i cannot throttle - but I wait it out, 5-10 minutes, then limp it back home.)
*20-1 hour drive is less than 20 km but traffic is bad in this part of the world.
I have been reading alot in the net specificaly this thread:
http://www.audizine.com/forum/showth...ausible-Signal
We have done all adaptation needed.
We have changed 2 things: the throttle body (brand new), and the ECU (again, brand new) - they were not fried previously, but you know how dealerships go about this. they just change and change. if they fixed the problem, i couldn't care less. but here I am 6 months later and it is still having this problem.
Any advice where I should start now? Am I left with changing the engine wiring harness?
For the record: my car is an 05 audi a6, c6 body, 3.0 liter (non-turbo), CVT 7 speed tranny. it is completely bone stock.
#29
I have the same problem that just started lately on my 2006 Avant. Same symptoms, ESP, EPC, CEL lights up, rough idle... I can usually stop the car, turn engine off, then restart. If that doesn't work the 1st time, the second cycle usually does the trick. Strange that this seems to be a common occurrence but yet no one has found a resolution thus far?
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koninoki (11-04-2021)
#30
I can go for days or weeks without the problem repeating after clearing the DTC's from engine 1 & engine 2 (on the S6 there are two ECM's) and the ABS module.
The measuring blocks seem to indicate that the throttle position sensor (TPS) is out of phase between the two TPS's.
The measuring blocks seem to indicate that the throttle position sensor (TPS) is out of phase between the two TPS's.
Apparently there is a TSB on the issue, so the shop cut off the plug and re-wired with a new plug and wires picked up from Audi. The pin connector style has been completely changed by Audi, which would seem to indicate that this may be a weakness of the old style pins.
I have had the car back for a couple of days and so far no problems, but that is not definitive so far since I have gone a few weeks in the past without a problem.