EPC and traction control light intermittent
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EPC and traction control light intermittent
Recently my A4 (3.0) has developed an intermittent limp mode (EPC and traction control light) I got codes on my obd2 scanner for accelerator pedal low voltage and promptly replaced the pedal.
This did not work so I got it scanned at an audi specialist who suggested an issue in communication between the ecu, throttle body and gas pedal. considering it can be reset by disconnecting the battery I was confident it wasn't a wiring issue and got a replacement throtle body which also did not fix the issue.
At this point I am going to bite the bullet and let an Audi specialist diagnose the issue, but I was also interested in hearing other possible solutions from seasoned Audi owners.
I can also confirm this is not the brake switch as the brake lights do not come on when the dash lights do.
This did not work so I got it scanned at an audi specialist who suggested an issue in communication between the ecu, throttle body and gas pedal. considering it can be reset by disconnecting the battery I was confident it wasn't a wiring issue and got a replacement throtle body which also did not fix the issue.
At this point I am going to bite the bullet and let an Audi specialist diagnose the issue, but I was also interested in hearing other possible solutions from seasoned Audi owners.
I can also confirm this is not the brake switch as the brake lights do not come on when the dash lights do.
Thread Starter
AudiWorld Newcomer
Joined: May 2026
Posts: 3
Likes: 1
Update, After unplugging the ECU and cleaning with wd40 contact cleaner I have no longer had limo mode come back on. This is the longest it has gone without coming back on, so fingers crossed it works out.
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