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U04A4 Engine Trouble Code

Meaning of U04A4 engine trouble code is a kind of network trouble code and when your car's 'U04A4 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.

U04A4 Fault Symptoms :

Check engine light comes on
Engine stalling or misfiring
Engine performance issues
Car not starting

If one of these reasons for U04A4 code is occuring now you should check U04A4 repair processes.
Now don't ask yourself; What should you do with U04A4 code ?
The solution is here :

U04A4 Possible Solution:

Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage.

U04A4 Code Meaning :

U	0	4	a	4
OBD-II Diagnostic Network (U) Trouble Code For Engine	Intake Valve Control Solenoid Circuit Low	O2 Sensor Heater Circuit 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.

U04A4 OBD-II Diagnostic Network (U) Trouble Code Description

U04A4 engine trouble code is about Timing Reference High Resolution Signal A Too Many Pulses.

Main reason For U04A4 Code

The reason of U04A4 OBD-II Engine Trouble Code is O2 Sensor Heater Circuit Malfunction.

U04A4 DTCs may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.

	Example: 0140