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Do you need to reset codes after changing coilpacks?

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Old 06-20-2007, 02:58 PM
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Default Do you need to reset codes after changing coilpacks?
Had my first CP failure last night. Had a spare in the trunk but it turned out I had misfires at # 2 and 3. I was able to limp a few miles home and the few miles to the dealer and had the dealer handle under aftermarket warranty. I was going to buy a couple spares but the service guy told me that if you don't reset the codes after changing out the CPs, the same problem will just happen again. Is this true? I don't have a vag-com yet? Thanks...
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Old 06-20-2007, 03:02 PM
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Default will they cause another problem? no, but they will hinder the diagnosis of future ones
since you may not be able to tell what codes are old / CP-related and what ones are related to the "new" issue
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Old 06-20-2007, 03:58 PM
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Not true. The CEL will dissapear after about 2-5 days on its own.
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Old 06-20-2007, 06:00 PM
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the MIL might, but the codes do not
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Old 06-20-2007, 06:19 PM
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Ah. Right.
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Old 06-21-2007, 04:45 AM
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Default The CEL doesn't disappear immediately? Last CP I changed, the CEL light went away when I started
the car with the new CP installed.
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Old 06-21-2007, 04:54 AM
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Sometimes it does and sometimes it doesn't. I've had it both ways.
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Old 06-21-2007, 04:54 AM
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Ahh, guess I've been lucky with that so far =D
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