Golf IV / Jetta IV :: Gauges Intermittently Dying - Code P1650
May 15, 2016
This is on a 2001 golf, 5 speed, ALH.
Just went for a drive the other day and the ABS light started to flicker on, and then it was accompanied by 3 loud beeps, which I understand is the ABS warning.
Then the gauges all died like I turned the car off, but the engine was still running. No limp mode, no stumbling, nothing.
The needles then bounce back to where they should be, and various lights on the dash flicker, oil pressure, battery, etc. Not any pattern to them, they all just kind of blink on and off randomly. Then it will stop and run fine for 20-30 minutes (longest I have driven it like this)
Sometimes when I put the key in the on position before starting it, the gauges will do the same thing, without the beeping, and it is like I am cylcing the key on and off several times, needles on the fuel and temp gauge bounce between zero and their actual reading (other gauges don't move because I'm at zero rpm and zero mph)
I have replaced fuses 11 and 15, checked battery voltage with the car off, idling and at 2000 rpm, 12.3 volts with the car off, 14.3 with it idling and at 2000 rpm
The cheap code reader at the parts store gave me a P1650 code, which is intermittent communication error on canbus (paraphrasing) which makes sense for the symptoms, but I know on these cars sometimes a totally different system in the car can interfere elsewhere.
I am going to check/clean grounds, what else should I be looking for?
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I made a video: [URL] ....
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