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P0139 Diagnostic Trouble Code Discussion for November 2010

Heated Oxygen Sensor (Bank 1 Sensor 2) Slow Response

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Trouble Ticket Help Requests for DTC P0139
Help Request Posted
2004 Alfa Romeo 156 JTS Sele 2.0L Poor Idle Quality, MIL Lamp on VIN: ZAR9320000
P0139: Lamda 1 signal below Cat slow. Cleaned contacts for Lambda 1 and 2, problem came back after 2 weeks. Replaced Lambda 1, problem came back after 1 week. Please help. Thank you
November 15, 2010