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P1904 Engine Trouble Code

Meaning of P1904 engine trouble code is : When your car's 'P1904 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.

P1904 Possible Solution:

P1904 Engine

The crankshaft sensor signals the fuel injection computer or the ignition control when the cylinders are firing. This causes the ignition coil to provide a spark and the injector to inject fuel into each cylinder at the right time.If either sensor isn't working correctly, the car will run rough and the engine will be less efficient. In later car models, the car's computer can usually keep the vehicle running, but the engine warning light on the dashboard goes on to warn the driver.

P1904 Code Meaning :

P 1 9 0 4
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Fuel And Air Metering Injector Circuit Malfunction - Cylinders Cold Start Injector 1 Malfunction Timing Reference High Resolution Signal A Too Many Pulses

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.

P1904 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P1904 engine trouble code is about Timing Reference High Resolution Signal A Too Many Pulses.

Reason For P1904 Code

The reason of P1904 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.

P1904 the main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit.