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P1421 Diagnostic Trouble Code Discussion for August 2008

Cold Start Emission Reduction Strategy Monitoring


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Trouble Ticket Help Requests for DTC P1421
Help Request Posted
2000 Volkswagen Jetta GLS 2.0L MIL Lamp on VIN: 3VWSC29MXY
P1421: secondary air valve circut short to ground. hello friends, this vehcile has 5 fault codes. circuts shorted to ground. vehicle runs pretty normal. starts and idles with no troubles. the catalyst rattles internally. if you clear the ecm the codes reset within a few seconds. i have checked all fuses. was w...
August 12, 2008
2000 Volkswagen Jetta GLS 2.0L MIL Lamp on VIN: 3VWSC29MXY
P1421: secondary air valve circut short to ground. hello friends, this vehcile has 5 fault codes. circuts shorted to ground. vehicle runs pretty normal. starts and idles with no troubles. the catalyst rattles internally. if you clear the ecm the codes reset within a few seconds. i have checked all fuses. was w...
August 12, 2008