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97 vw jetta Engine codes 171 and 1476
lchristensen1
Posts: 3
I have replaced the purge valve, If i have made the proper repairs Will the codes clear right away or do you have to drive it for a certain amount of miles?
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Answers
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Yes, in almost all cases the codes will clear themselves eventually after repair. The best method is to clear them with a scan tool. Some people say to disconnect the battery for 10 minutes or so, but this has a number of disadvantages---one, it might not work depending on the type of ECU and whether there are capacitors in place that might supply power to the ECU anyway; and two, your car will have to relearn radio pre-sets as well as some of your driving habits.
Some codes would require a more sophisticated scan tool than the $19.95 variety.