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P0138 Engine Trouble Code

Meaning of P0138 engine trouble code is a kind of powertrain trouble code and when your car's 'P0138 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.

P0138 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 P0138 code is occuring now you should check P0138 repair processes.
Now don't ask yourself; What should you do with P0138 code ?
The solution is here :

P0138 Possible Solution:

P0138 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.

P0138 Code Meaning :

P 0 1 3 8
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Intake Valve Control Solenoid Circuit Low Fuel Rail/System Pressure - Too High Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector) Clutch Position Sensor 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.

P0138 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P0138 OBD-II Trouble Code The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture P0138 code.

Main reason For P0138 Code

The reason of P0138 OBD-II Engine Trouble Code is Fuel Rail/System Pressure - Too High.

P0138 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.