Golf IV / Jetta IV :: ASR Light Permanently On / ECP Turns On And Car Goes Into Limp Mode


Jan 31, 2016

2001 Jetta 1.8T wolfsburg

When I start my car the ASR light is already on and I cannot turn it off by hitting the button. It's just permanently on. Then as I start to drive and step on the throttle and get above 3000rpm the ECP light turns on and my car goes into "limp mode". Then in idle the engine stutters and RPMs go up and down, up and down. I'll turn off the car and the ECP light disappears but comes right back on again after getting above 3000rpm.

Thing is, these issues only appeared immediately after the following:

-Disconnected and reconnected CCM (checking for faulty wiring, battery was connected during this)

-Disconnected battery terminals for 3 minutes and reconnected them (no key in ignition)

Did I cause an issue by disconnecting battery?

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I've noticed that if I turn the ignition to "on" and it's acting up, all I have to do is leave it on for a few seconds, turn the ignition back off, and turn it back on; sometimes it'll take 2-3 tries but it always seems to work. Then the warning lights come on bright and steady, the car starts like normal, and drives great.

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