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P0159 Diagnostic Trouble Code Discussion for July 2006

Heated Oxygen Sensor (Bank 2 Sensor 2) Slow Response

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Trouble Ticket Help Requests for DTC P0159
Help Request Posted
2001 Land Rover Discovery Series II SD 4.0L Poor Idle Quality, MIL Lamp on VIN: SALTL15411
P0159: Lambda sensor aging downstream bank 2. This Discovery has returned for third time complaint of rough idle, surging and MIL on. We replaced a bad right front O2 sensor in March. Found same sensor not responding again. Reads less than .01 volt when warmed up. Right rear sensor reads .9 volt or higher...
July 20, 2006