obd2 codes
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Join Date: May 2008
Location: Great Mills, MD
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Fos, the P0171 and P0174 are saying that the engine is running lean in banks 1 and 2. This is more than likely caused by a vacuum leak. There are 3 common points that you can be getting this. You have the brake booster hose, the PCV valve hose (runs from the air box to the intake manifold), and then finally the IMT valves (2 black circles on the left side of the engine if you are standing in front of the car looking into the engine bay).
As for the P0117 code, that is saying that you have a low resistance on the engine coolant temperature sensor. I would try disconnecting the sensor and see if you get a different code (P0118-temp circuit high resistance). If this is the case, you have a bad temp sensor, replace the sensor. If the code remains the same, you have a wiring issue and it needs to be looked at by a professional unless you are good with wiring.
As for the P0117 code, that is saying that you have a low resistance on the engine coolant temperature sensor. I would try disconnecting the sensor and see if you get a different code (P0118-temp circuit high resistance). If this is the case, you have a bad temp sensor, replace the sensor. If the code remains the same, you have a wiring issue and it needs to be looked at by a professional unless you are good with wiring.
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trosty
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
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