Operation CHARM
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1990
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Passat L4-1984cc 2.0L DOHC (9A)
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Sensors and Switches - Computers and Control Systems
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Technical Service Bulletins
Sensors and Switches - Computers and Control Systems: Technical Service Bulletins
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Customer Interest
Engine - Poor Driveability
MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke
By Symptom
Customer Interest
Engine - Poor Driveability
MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke
Driveability
Engine - Poor Driveability
MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke
High emissions
Engine - Poor Driveability
Inoperative
Oxygen Sensor - Failure Due to Silicone
All Technical Service Bulletins
Speed Sensor - G 54 Circuit Update
Engine - Poor Driveability
Oxygen Sensor - Failure Due to Silicone
Volume Air Flow (VAF) Sensor - Revised
Knock Sensor - Revised
Knock Sensor - Avoiding Unnecessary Replacement
MIL ON - Poor Idle/Stalls, Loss of Power, Exhaust Smoke