Question about 2004 Jaguar X-Type
The P0171 n P0174 codes come up when the ECM detects a lean air fuel mixture in the system. This means that there is too much air in the mixture.
This can be caused by one or more of the following:
Vacuum leak between MAF sensor and throttle. Check air duct to intake manifold, make sure the clamp is tight.
Fuel Filter restricted - Replace
Fuel Injector restricted - Service fuel system.
Fuel Pump low output - Check fuel pump pressure
Fuel Pressure Sensor defective - Test.
HO2 sensors faulty = Check sensors and wiring
Exhaust leak (before catalyst) - Check
ECM receiving incorrect signal from one or more of the following sensors: MAF, ECT, IAT, IP, EFT, OR TP SENSORS. - Have them checked.
Good Luck!!! Don't forget to rate this post!!
Posted on Aug 23, 2010
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Posted on Jan 02, 2017
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