U1904 Engine Trouble Code
Meaning of U1904 engine trouble code is a kind of network trouble code and when your car's 'U1904 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.
U1904 Fault Symptoms :
If one of these reasons for U1904 code is occuring now you should check U1904 repair processes.
Now don't ask yourself; What should you do with U1904 code ?
The solution is here :
U1904 Possible Solution:
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.
U1904 Code Meaning :
|OBD-II Diagnostic Network (U) 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.
U1904 OBD-II Diagnostic Network (U) Trouble Code DescriptionU1904 engine trouble code is about Timing Reference High Resolution Signal A Too Many Pulses.
Main reason For U1904 CodeThe reason of U1904 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.
U1904 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.