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P1173 Diagnostic Trouble Code Discussion for May 2014

Electronic Throttle System Rationality


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Trouble Ticket Help Requests for DTC P1173
Help Request Posted
2004 Land Rover Range Rover HSE 4.4L MIL Lamp on VIN: SALMF11474
P1173: downstream fuel trim malfunction bank2 front sensor aged rear adaption too lean/rich. I've run out of ideas, need some help from Range rover guys! Fuel trims are low, Lt both sides around 5 and St +or- 2 to 3. Vehicle runs well, no other codes or problems, need it to run the O2 monitor to get through smog check as Ca only allows 1 and evap purg...
May 21, 2014