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Sedans Volkswagen Jetta Volkswagen Jetta Maintenance and Repair
6291 messages, Last post on Dec 05, 2009 at 6:40 PM
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| I just returned from a VW dealer who proposed that I replace my MAF sensor and N80 valve. I thought I would do some research first before shelliing out $500. I have been reading that cleaning the MAF sensor will work and is easy. I can not find any info on the N80 valve. Can you tell me first where to find both under the hood and secondly give your opinion on the best avenue to pursue? Thanks..... | |
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a week ago, my 2001 Jetta check engine light is on and i can feel the car drives more shaking than usual. went to autozone for a free engine check and was told that one of the six spark plugs needs to be replaced. Replaced all the spark plugs and reset the battery. The light is off for 4 days and it is on again!! do you guys have similar experience with that? i am really concernd about the car. i know it could be a small problem or indicates big problem of the car. should i also replace the wire that connect the spark plugs?
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Replying to: ohbaobei (Apr 21, 2009 1:28 pm) Something new might be wrong now. If it is the same code then it might be the wire associated with that cylinder where you changed the spark plug. Try using a fuel injector cleaner like "Lucas". Just in case the injector (if you have them) is dirty? If another code comes up then it may not be related to the spark plug issue but a new issue. Please relate the code you were given. Ask for a printout. |
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Replying to: ohbaobei (Apr 21, 2009 1:28 pm) |
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My 99.5.Jetta GL has just given me the following OBD2 codes and I need one of you smart mechanics to let me know if I'm heading in the right direction... - P0301 (Cylinder 1 Misfire) - P0140 (O2 Sensor) - P0341 (Camshaft Position Sensor) - P0134, (O2 Sensor) and - P0141 (O2 Sensor) I've never known my car not to have Camshaft Position Sensor issues, so I can probably assume that one's not important. My CEL has been on for almost all of the time that I've owned my car, but the other day it was flashing when my wife drove it. I'm headed towards picking up an ignition coil, wires and plugs and going from there. Whaddya all think?? Thanks in advance! 
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Replying to: djt_jetta (May 03, 2009 7:49 am) If the ECU gets bad signals from the CPS, it could misfire a sparkplug and thus allow raw fuel into the exhaust (causing O2 sensors to misread due to overload of raw fuel in the exhaust). Using the troublecodes, you need to now interperet the readings and reduce them to a common problem. HOWEVER - since you claim that you have not been keeping your engine healthy and the CEL has been on for years... it may not be trivial to perform an accurate diagnosis. However DO NOT make the mistake of thinking that this means the sensor itself is at fault.... It MAY be - but troublecodes can only tell you 'symptoms'... not the problem.
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Replying to: djt_jetta (May 03, 2009 7:49 am) I think you should not drive the car with the CEL flashing.
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Replying to: jeffyscott (May 04, 2009 6:32 am) |
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I need to remove the engine cover on a 2.0 L 2003 vw jetta and it seems to be frozen in place. I want to check the plugs for a slight miss. I guess while I am at it I will change the plugs. What is the best book for help? No check engine light. Still get 23-25 mpg and the miss is at 60-75 mph. AGM |
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Replying to: jeffyscott (May 04, 2009 6:32 am) Waiting for parts to arrive ...  Thanks |
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