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  1. Volkswagen Passat B5 Discussion
    Hey guys I’m back and decided to make a fresh post now that I have a proper vag tool. 2001 Passat 1.8l AWM knock sensor is reading low voltage. I’m on measuring block 26 and sure enough knock sensor is reading low voltage. Cyl 1: .23v Cyl 2: .23v Cyl 3: .35v Cyl 4: .35v When I rev the...
  2. B5 Garage
    03 passat 2.8 v6 4motion died after the polar vortex hit Chicago. I went outside to start it one day it was like-30. The battery sounded dead so I tried hooking up a battery charger but I gave up and installed a new battery. No luck, cranks forever but no sign of life. I replaced the engine...
  3. Volkswagen Passat CC Discussion
    My wife has a 2014 CC with factory backup camera that had recently been giving her a “backup camera unavailable”. My question is if anyone knows or can point me in the right direction on where the power for the backup camera comes from? I started troubleshooting by researching online and found...
  4. Volkswagen Passat B5 Discussion
    Hi Everyone, Very odd situation. When I start the car PRND432 remains lit. I erase the code as the engine running, drive, the code never comes back. Turn off the engine. Start back on. The code is back. Battery, alternator tested by Autozone and Oreilly, they are fine. However, using VAG...
  5. Volkswagen Passat B5 Discussion
    Using accessories, like hazard/flashers, causes other lights to dim, or wipers to slow. At idle, hazards cause a faint whining sound, WAAA-aaa-WAAA-aaa-WAAA-aaa, lower pitch when the hazards are lit. Also, sometimes the car doesn't want to crank. It randomly won't want to crank on the first try...
  6. Volkswagen Passat B5 Discussion
    2003 Passat GLS V6. 120k miles. The car seems to use battery while sitting. Typically I come back to it and it's at about 3-4 V between battery posts. I heard something sound like it was kicking on when I hooked it to a trickle charger. Came from somewhere near the brake proportioning valve...
  7. New Member Introductions
    Please help me about this failure. Is it possible that car alarm can cause this problem? Thank you!
  8. B5 Garage
    Got home from a 3 week trip and my2003 Passat won't start. No fuel pump sound when first turning on ignition. Replaced the pump and relay 40,000 miles ago. Upon checking voltage on terminals 1 and 4 at the fuel pump I only get 1.4 volts with ignition on and 11.9 when cranking the engine (12.2...
  9. Volkswagen Passat B5 Discussion
    Hey guys, So I'm still driving around with my scan gauge on my 03. I've noticed that the alternator charging voltage is about 13.3-13.6 vdc, but sometimes when turning hard or coming to a quick stop it drops to 12.9 vdc sometimes for 20-30 seconds. If I tap the throttle usually it jumps back...
  10. New Member Introductions
    Im wondering if there is a way to raise the voltage on the 1999 Passat 1.8t wagon. I had a new H/O Alternator built but I have been told the CPU manages the voltage. Im wanting to run at almost the max potential of the regulator. In the morning its a nice 14.1 cold voltage. Once it warms up Im...
  11. Volkswagen Passat B5 Discussion
    2000 A4 Quattro 2.8 with 5 speed manual transmission. Yesterday my low battery light came on and went off several times in 50 minutes of driving. When the light was on the voltmeter showed about 12 volts (less after the engine ran off the battery only for a while). When the light was off the...
  12. Volkswagen Passat B5 Discussion
    My '99 Passat 2.8L cranks, but won't start. Fuel pump doesn't run. Only 4.0 volts supplied to fuel pump. Only 4.0 volts present in fuel pump circuit at the fuse box & relay box. Also, 4.0 volts on green/white wire to fuse #28 and the green wire to fuse #29. The red/green wire from fuse #29 has...
  13. Volkswagen Passat B5 Discussion
    Spark plugs are black and I don't know voltage for wide band O2 sensor and volume for MAF sensor. I have a code reader with voltages and wave form mode. I suspect bad MAF sensor, where is it? thanks. Found O2 sensor voltages...
  14. Volkswagen Passat B5 Discussion
    So this may have already been addressed, I could not find anything. I have a screenshot I will post up ASAP - but I'm at work so I can't now. 2001 1.8t, all stock - no mods or chips etc. Running some diagnostics in VAGCOM, and noticed my voltage readings for the coils - cylinder 3 I believe...
  15. B5 Garage
    Hello! I'm about to remove the serpentine belt because the tensioner is jumping a few cm, I think it is the bearing on the alternator that's bad. The engine has 44 000 KM on it. I need to replace the bearing for the visco clutch also, it has been giving a whistling noise for a few months. Can...
  16. B5 Garage
    My 03 Passat V6 (ATQ) is not charging. ~12V with the engine off, ~11.5V with engine on (goes down even more if I turn on lights etc.). Here's the clues: - Car started to die while driving (gages went out). I stopped at Auto Zone and had the charging system tested. Battery tested OK (needs...
  17. Volkswagen Passat B5 Discussion
    Hello all, my english is not very good, so please be patient:) I really need your help. One day i came to my car (Passat B5 AFN 1998) and battery was dead. Then after charging i checked consuption, which was 2,5A (key was not in ignition). There was one more strange thing - wierd sound from...
  18. Volkswagen Passat B5 Discussion
    2001 B5 V6 ATQ As the title states, my voltage regulator just let go. I know I can buy this separately, but is it worth it? Has anyone ever just replaced the regulator and not the entire alternator? Any advice/help greatly appreciated. Part number of original alternator: 078 903 016 F This...
  19. Volkswagen Passat B5 Discussion
    So i had this issue where the car was running really rich on idle. I used vag com and saw that when you revved in idle, the MAF got stuck in high voltage as if there was a lot of air going into the engine causing more fuel to be dumped making the car run rich. So yesterday i replaced the MAF...
  20. Volkswagen Passat B5 Discussion
    Hey I know about the heated mirrors issue about leaving the knob in either left or right position. What my problem is that when I measure the voltage, there is always 10-12 Volts no matter the knob is in left, right or center and whether the rear defrost is on. It turns of course of when the...
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