Car wont stay idled

Asked by Jan 10, 2017 at 02:42 AM

Question type: Maintenance & Repair

I have a 1999 audi a6 that wont stay idled. Codes p1559
throttle valve and p1602 power supply tetminal voltage too
low came up. I had the throttle valve replaced and
computer cleared. The p1602 came back and car still idles
bad. Whats next to do? I need help desperately beibg this is
my only transportation

1 Answer


Take a voltmeter and check the battery with the engine off and after running, check the battery terminals, and finally check the vacuum lines. The P1602 I think it shows that sometime the battery was disconnected. When you start the car, does the dash lights blink? (this shows the battery is starting to go bad).

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    Tom Demyan
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