Check P1278 Fault Code
When you check engine light came on code P1278 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However your vehicle's manufacturer may have a different definition for the P1278 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.
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P1278 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. |
P1278 Possible Fix :
Probably the biggest result of injector failure is due to the injectors having excessive return flow or back leakage. This is due to worn parts which allow excessive fuel to go through the diesel injector and to return back to the tank or fuel system. This causes a drop in rail pressure which results in hard starting or not starting at all.
P1278 OBD-II Diagnostic Powertrain (P) Trouble Code DescriptionP1278 OBD-II Trouble Code Air Fuel Ratio Sensor 1 Circuit Slow Response is one of the definitions for the P1278; however your vehicles manufacturer may have a different definition for the P1278 code. Please check below for youReason For P1278 CodeThe reason of P1278 OBD-II Fault Code Check is P1278 Air Fuel Ratio Sensor 1 Circuit Slow Response. |
P1278 Solution:
Power Steering Pressure (PSP) Switch Signal Malfunction The PCM counts the number of times vehicle speed transitions from 0 to a calibratable speed. After a calibratable number of speed transitions the PCM expects that the PSP input should have changed. This DTC is set if the transition is not detected. Vehicle towed with engine running Power steering hydraulic concern was repaired but DTC was not erased PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged Check, if possible, if vehicle was towed or power steering service was performed. Observe PSP V PID while checking wires for intermittents.
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What does fault code P1278 mean ?
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How to Clear P1278 Trouble Code
An OBD 2 scanner is the best and safest way to erase a DTC from your car's system. This scanner communicates with the car's computer and instructs the computer to erase the code. It does not change or tweak the settings from inside the car or its systems.