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Wolfgang, VW Master Technician
Category: VW
Satisfied Customers: 4587
Experience:  Senior VW Master Tech 15 yrs
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I just replaced heater core on a 01 Jetta and now I'm

Customer Question

I just replaced heater core on a 01 Jetta and now I'm getting code p0445 p1472 p0418 p0414 p0037 check all fuses and relays all good also rechecked all under dash grounds and connections all ok I cleared codes and all cam back after start up.
Submitted: 1 year ago.
Category: VW
Expert:  Wolfgang replied 1 year ago.

Thanks for choosing Just Answer . I'm Wolfgang here to help!!
Below is my first answer or request for more information. If you do not understand it, or you need more information from me, or need me to go in more detail. Do not rate yet, just reply. Put yourself in my shoes, I can not see, smell, hear, feel or touch your car, nor do I know any history on it. So take into consideration I am doing my best based on what you tell me. Also understand fixing cars often requires sophisticated tools, that you may not own. So even if you can not do what is outlined in my answer, that does not mean my answer is wrong deserving to be rated negative.

i do need more information!! i do need a vin # ***** get the factory wiring diagram to assist!!


Customer: replied 1 year ago.
vin number is ***** as for tool I have all the tool needed to test electrical systems. I know to check voltage at fuel pump relay and do the jumper wire test to see if it drops below 9 volts while cranking. An if so to test ign black wire for same voltage drop. And yes both tests it dropped to 7.8 volts bat voltage is 12.5 volts. For testing equipment I have a fluke88, SnapOn versus, Lang lab scope
Expert:  Wolfgang replied 1 year ago.

ok is #43 fuse blown? please let me know?

Customer: replied 1 year ago.
Nope it not
Expert:  Wolfgang replied 1 year ago.

ok do you have 12 volts at that fuse key on engine off?

Customer: replied 1 year ago.
have good voltage at fuse and panels. If you have not figured it out yet I am a auto tech like your self I'm just not a VW guy. For the most part I have stayed away from them except older ones.
Expert:  Wolfgang replied 1 year ago.

if you go to the canister purge valve and read the voltage there what is it? one wire to ground then the other?

Customer: replied 1 year ago.
I found the problem in the ecu odd for this year of car. The sodder from one of the dio grew out and was touching another. I have only seen this on much newer car.
Expert:  Wolfgang replied 1 year ago.

great to hear !!!

anything else?

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