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P0139 Diagnostic Trouble Code Discussion for February 2011

Heated Oxygen Sensor (Bank 1 Sensor 2) Slow Response

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Trouble Ticket Help Requests for DTC P0139
Help Request Posted
2004 Audi A4 1.8L Hesitation, MIL Lamp on VIN: WAUJC68EX2
P0139: o2 sensor slow response b1 s1. Car running poorly check engine light on. Found 5 DTC"s Tested o2 sensor/ A/F sensor heater working and sensor working. Cooling fan stays on all the time. Found Identifix bulletins leading to Leak detection pump(LDP). LDP is not receiving power tested fuel...
February 04, 2011