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. 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.
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