Last post on Jun 11, 2013 at 10:42 AM
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Volkswagen Jetta, Sedan
#5757 of 6636 2001 Jetta Problem....need help
Aug 22, 2008 (8:03 am)
Ok, so here is the deal. i have a 2001 VW Jetta 1.8 turbo stick shift, 99xxx miles. The car had been sitting for about a week. I am a dealer but I am trying to get out of the business. one of my drivers had the car for a while and he told me that the car would run fine and then all of a sudden run bad. So when I picked it up yesterday, to my surprise, the car was running like a dream. Turbo was boosting, it had pep and it drove great.......for about 20 minutes. All of a sudden a the EPC light came on and the little triangle warning light. I had power loss and it started sputtering(misfiring). It drove ok on the highway but you can tell something is wrong, especially in lower speeds. So here are the trouble codes with the meanings:
P1176 O2 Correctionbehind Catalyst, B1 Limit Attained
P1297 Connection turbocharger - throttle valve pressure hose
P1103 O2 Sensor Heating Circ., Bank1-Sensor1 Output too low
P1171 Throttle Actuation Potentiometer Sign.2 Range/Performance
P1542 Throttle Actuation Potentiometer Range/Performance
P1545 Throttle Pos.Contr Malfunction
P1568 Idle Speed Contr.Throttle Pos. mechanical Malfunction
P1602 Power Supply (B+) Terminal 30 Low Voltage
P0102 Mass or Volume Air Flow Circ Low Input
P0300 Random/Multiple Cylinder Misfire Detected
P0507 Idle Control System Higher than Expected
I would like to fix this myself but I would like to have a game plan. I am noticing a lot of O2 sensor things, throttle control or position(maybe the sensor), maybe the mass air flow sensor. Is there one thing I should try first? Is there one thing that would set all the others off?
Any help is greatly appreciated....Thanks guys
#5758 of 6636 Re: cold air intake [lenteloco]
Aug 22, 2008 (4:39 pm)
OK - you want power -- then forget the CAI which will make no measureable change and go for a supercharger kit
#5759 of 6636 Re: 2001 Jetta Problem....need help [djguido]
Aug 22, 2008 (4:41 pm)
What you describe sounds like the ol' "coolant migration problem" which wrecks havoc with the electrical system.
#5760 of 6636 Re: 2001 Jetta Problem....need help [bpeebles]
Aug 30, 2008 (4:18 pm)
I understand that when the coolant migrates u mean like a leak that would drip and run and get into the wires, and I know that there are a few products out there to cure minor coolant leaks. However could this also cause power loss where it is only happening between 2000-3000 RPMs and in every gear? would it be more likely an O2 sensor or a plugged fuel rail or something?
I have a 96 Jetta, and I notice from time to time that the coolant is lowering, tried the lucas coolant fixer but still seems to be leaking some place...should I try to cure the coolant leak and hope that cures me? or is my problem more in a blocked air or fuel path? would there be any chance that its an ECM getting weak?
#5761 of 6636 Re: engine skematics for 95 jetta 3 [djnarcolepsy]
Aug 30, 2008 (4:32 pm)
Im sure ur looking for a hose, i have a 96 and the hose clamp and part of the hose is still there but ripped off, so i looked at a buddy's golf, it was a hose that went from the air box to the exhaust manifold, just a cold air intake from factory kind of setup, so if urs is gone and the manifold is still good just get a new hose, if like mine and the tin around the manifold is gone then ur better off just leavin it be
#5762 of 6636 Video about "coolant migration problem"
Aug 30, 2008 (6:21 pm)
The "coolant migration problem" is a specific failure whereas the antifreeze leaks into the electrical connector plugged into the side of the expansion tank. The plastic insulation on the wires acts as "tubes" which actually guide this leaking coolant directly into the heart of the electrical system. Antifreeze tends to corrode the copper in the wires. People who have had the "coolant migration problem" for a long while have reported that the entire electrical system gets corroded.
Here is a video about the "coolant migration problem".
Sep 05, 2008 (10:02 am)
2001 VW Jetta run very ruff, missing and won't start in wet weather (rainy days). Got to be electrical problem? Was there a re-call on some problem about this or what should I look for? Replaced plugs and wires.
#5764 of 6636 Re: Wet Weather [kenadele]
Sep 05, 2008 (10:38 am)
Maybe coil pack(s).
#5765 of 6636 Re: Wet Weather [kenadele]
Sep 05, 2008 (11:24 am)
How many miles? 2.0L engine?
I bet it is your coil pack. Replace the coil pack, wires, and the plugs.
#5766 of 6636 how to change spark plugs, caps and wires
Sep 07, 2008 (10:33 am)
I have a 2001 VW Jetta GL 2.0 4 cyl. I am trying to change the cap, wires, and spark plugs. But the header covers seems to be in the way of the some of plugs. How do I change the spark plug? Do I need to remove anything to get at all 4 of them?