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2001 Volkswagen GTI- CEL PO420


jgentil
11-15-2006, 07:52 PM
GTI has a miss or hesitation when pressing throttle in netural or under load. Ckeck engine light reads a PO420. Occurs hot or cold. Vehicle has 70k miles and is 6 cylinder. Any suggestions? Spark plugs, coil pack, air filter, TB, catalytic?

yogegoy
11-16-2006, 05:28 AM
Not sure about the DTC but seems you have a bad Mass Airflow Sensor.

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