Code P0135 Possible Causes
Heated Oxygen Sensor Bank 1 Sensor 1 circuit fuse
Heated Oxygen Sensor Bank 1 Sensor 1 circuit poor electrical connection
Heated Oxygen Sensor Bank 1 Sensor 1 harness is open shorted
Engine vacuum leaks
Exhaust gas leaks
Faulty fuel injectors
Faulty Rear Heated Oxygen Sensor Bank 1
Fuel contamination

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