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The MAF sensor can also be contaminated by fuel vapors that back up through the intake manifold and throttle body when the engine is shut off. P1132 is front 02 bank 1 and P1152 is front 02 bank 2 This codes indicate a rich condition. What causes P0171 and P0174 codes Ford f150 COMMON CAUSE: A DIRTY MAF SENSOR One of the most common causes of Ford P0171 and P0174 lean codes is a dirty mass airflow (MAF) sensor.
#What does p0171 and p0174 ford engine codes mean code#
Reason For P1131 Code The reason of P1131 OBD-II Engine Trouble Code is Fuel Rail/System Pressure - Too High. P1131 OBD-II Trouble Code Lack Of HO2S Switch - Sensor Indicates Lean is one of the definitions for the P1131 however your vehicles manufacturer may have a different definition for the P1131 code. Code P1131 can be caused by a vacuum leak, fuel injector problem, ignition problem or by a faulty oxygen sensor. Trouble code P1131 means that the powertrain control module has detected a lean condition for engine bank No.1. In these instances, P1131 will set when the voltage being returned by the sensor is no longer switching above and below approximately. P03XX codes are all misfire codes for each cylinder. The O-rings love to fail and suck in extra air which gives you a lean mix and will give you the codes you have. First thing would be to check for vacuum leaks, especially at the intake manifold upper/lower junction. What does p1131 manufacturer specific code mean?Ĭode P1131 is a manufacturer's specific code and as such lets you know that diagnosing this condition may be different between manufacturer's vehicles. The P0171, P0174, P0175, are all lean codes.