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P0136 Diagnostic Trouble Code Discussion for April 2012

Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0136
Help Request Posted
2002 Ford Focus ZX5 2.0L Poor Idle Quality, MIL Lamp on VIN: 3FAFP37332
P0136: H02S12 Fault. Hello and thanks for your help. This car has rough idle all the time. The engine smooths out when you get it off idle. It appears to be running lean as when propane is added into the air cleaner the idle speeds up and smooths out. However the fuel pressure and...
April 20, 2012