I need help since I bought my car last year the dash lights flash on me all the time they flicker than today check engine and I scanned it and got 17645.p1237, 17646.p1237, 17647.p1239, 17648.p1240 fuel injector cylinder 1,2,3,4 open circuit, how can I drive the car if the it an open circuit why all of them help. This happened before christmas then it went away with the colder weather. Also just installed my stereo and have been running the battery down I watch the voltmeter on the dash go down to 12 volts when i'm at a light Im getting engine code 18010.p1602 power supply (B+) Terminal 30 : low voltage. When I drive it goes up to 14 volts is the code from the battery drain. Has anyone upgraded there alternator, and to how many amps.

Thanks For Any Help

sam.hollis

1999 a4 1.8t quattro automatic

 

did you install the stero your self? if so check all you connections it souds like you grounding out some where, the majority of peaople on AF are running after market steros, subs and amps, with no problems what so ever.
Also my dash lights flicker as well, when i asked a mechanic about he said it is somewhat common and there is no cheap or easy way to fix it.