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Thread: Couple of fault codes, what do they mean?

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    Regular Member Marky's Avatar
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    Default Couple of fault codes, what do they mean?

    I have just read the fault codes on my car as I have a problem with lack of power (think this is the egr valve so gonna clean it in a mo) and the cruise control cutting out.

    I had a number of codes (most not-present) so I cleared them all on only two have reappeared. They are baffling me, no idea what they mean:


    P0621-01 Generator lamp "L" control circuit malfunction
    B2966-05 Driver doorknob circuit open or high voltage

    any one have any ideas?

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    Regular Member Marky's Avatar
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    I should have searched harder

    I had a new alternator fitted before christmas. I guess this is probably the source of the "P0621-01 Generator lamp "L" control circuit malfunction" message

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    OK I also get the following codes that keep reappearing in the CIM:

    B3700 - Wiper Interval Circuit Malfunction
    (0F) - Not present

    B3794 - Switch Cruise Control Circuit Malfunction
    (08) - Not present

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