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U2004 Engine Trouble Code

Meaning of U2004 engine trouble code is : When the check engine light comes U2004 code on the first you should check is the gas cap. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off. Alternately, you can purchase a gas cap for about $3 at an auto parts store. All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage.

U2004 Possible Solution:

U2004 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.

U2004 Code Meaning :

U 2 0 0 4
OBD-II Diagnostic Network (U) Trouble Code For Engine Fuel And Air Metering (Injector Circuit Malfunctions Only) Ambient Air Temperature Sensor Circuit Low Cold Start Injector 1 Malfunction Timing Reference High Resolution Signal A Too Many Pulses

The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and air are in the cylinders. Optimizing this mixture means better fuel economy and fewer exhaust emissions.

U2004 OBD-II Diagnostic Network (U) Trouble Code Description

U2004 engine trouble code is about Timing Reference High Resolution Signal A Too Many Pulses.

Reason For U2004 Code

The reason of U2004 OBD-II Engine Trouble Code is Ambient Air Temperature Sensor Circuit Low.

Parts or components should not be replaced with reference to only a U2004 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.