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p0411 sqealing cold start

  1. MKIV GTI
    Ok I just fixed my ECT sensor on my 2002 GTI 1.8T and cleared the related CEL but just last week I got another engine code. P0411. Secondary air ignition. Around the same time the new code came up, my car squealed for about 10 seconds on cold starts, and again if I would stop at a stop sign...
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