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Possible Causes

Possible Causes
INTERMITTENT DTC
EXHAUST LEAK
OXYGEN SENSOR WIRING OR CONNECTORS
O2 SENSOR SIGNAL CIRCUIT
O2 SENSOR RETURN CIRCUIT
1/2 OXYGEN SENSOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .