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B1391 Engine Trouble Code

Meaning of B1391 engine trouble code is a kind of body trouble code and B1391 code can be about replacing a broken oxygen sensor can eventually lead to a busted catalytic convertor which can cost upwards of $2,200. Taking your car into a shop will cost you around $210 depending on the car. However, an oxygen sensor is easy to replace on many cars and is usually detailed in the owner's manual. If you know where the sensor is, you only have to unclip the old sensor and replace it with a new one. Regardless of how you approach it, you should get this fixed right away.

B1391 Fault Symptoms :

Check engine light comes on
Engine stalling or misfiring
Engine performance issues
Car not starting

If one of these reasons for B1391 code is occuring now you should check B1391 repair processes.
Now don't ask yourself; What should you do with B1391 code ?
The solution is here :

B1391 Possible Solution:

Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.

B1391 Code Meaning :

B	1	3	9	1
OBD-II Diagnostic Body (B) Trouble Code For Engine	Fuel And Air Metering	Throttle/Pedal Position Sensor/Switch A Circuit Intermittent	Crankshaft Position Sensor A Circuit Malfunction	Crankshaft Position Sensor A Circuit Low Input

Regarding the B1391 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold bracket. This is done most easily from below the car in the area near the oil filter.

B1391 OBD-II Diagnostic Body (B) Trouble Code Description

B1391 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Main reason For B1391 Code

The reason of B1391 OBD-II Engine Trouble Code is Throttle/Pedal Position Sensor/Switch A Circuit Intermittent.

B1391 DTC reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.

	Example: 0140