P1256 Engine Trouble Code

Meaning of P1256 engine trouble code is a kind of powertrain trouble code and when your car's 'P1256 Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.

P1256 Fault Symptoms :

  1. Check engine light comes on
  2. Engine stalling or misfiring
  3. Engine performance issues
  4. Car not starting
If one of these reasons for P1256 code is occuring now you should check P1256 repair processes.
Now don't ask yourself; What should you do with P1256 code ?
The solution is here :

P1256 Possible Solution:

P1256 Engine

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.

P1256 Code Meaning :

P 1 2 5 6
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Fuel And Air Metering Manifold Absolute Pressure/Barometric Pressure Circuit High Input Cylinder 1 Injector Circuit Low Ignition Coil A Primary/Secondary Circuit Malfunction

Is the fuel pump sometimes not priming when you turn the key to ON(II)? Start by measuring the fuel pressure and checking whether you have bright white-bluish spark at all four plugs. The mechanical timing is also something that you should check, as we mentioned above.

P1256 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P1256 OBD-II Trouble Code Pedal Correlation PDS1 and HPDS is one of the definitions for the P1256; however your vehicles manufacturer may have a different definition for the P1256 code. Please check below for your specific mak P1256 code.

Main reason For P1256 Code

The reason of P1256 OBD-II Engine Trouble Code is Manifold Absolute Pressure/Barometric Pressure Circuit High Input.

P1256 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.