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P3931 Engine Trouble Code

Meaning of P3931 engine trouble code is a kind of powertrain trouble code and theoretically you can drive for a few weeks or even months with a broken MAF sensor. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot. At a shop, the replacement cost is between $240-$400 depending on the car, but that's usually the cost of parts because the labor is relatively simple.

P3931 Fault Symptoms :

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

If one of these reasons for P3931 code is occuring now you should check P3931 repair processes.
Now don't ask yourself; What should you do with P3931 code ?
The solution is here :

P3931 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.

P3931 Code Meaning :

P	3	9	3	1
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine	Ignition System Or Misfire	Injector Circuit Malfunction - Cylinders	Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)	Crankshaft Position Sensor A Circuit Low Input

The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue.

P3931 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P3931 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Main reason For P3931 Code

The reason of P3931 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.

P3931 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

	Example: 0140