Code Search

Please fill the "Code Box" to find engine fault code.

Car Models :

Please select your car.

How To Clear Check Engine Lights ?

Ways to clear check engine light on car panel.

Check Engine Light Dictionary

Ways to clear check engine light on car panel.

U0284 Engine Trouble Code

Meaning of U0284 engine trouble code is a kind of network trouble code and when the check engine light comes U0284 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.

U0284 Fault Symptoms :

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

If one of these reasons for U0284 code is occuring now you should check U0284 repair processes.
Now don't ask yourself; What should you do with U0284 code ?
The solution is here :

U0284 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.

U0284 Code Meaning :

U	0	2	8	4
OBD-II Diagnostic Network (U) Trouble Code For Engine	Intake Valve Control Solenoid Circuit Low	Manifold Absolute Pressure/Barometric Pressure Circuit High Input	Ignition/Distributor Engine Speed Input Circuit 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.

U0284 OBD-II Diagnostic Network (U) Trouble Code Description

U0284 engine trouble code is about Timing Reference High Resolution Signal A Too Many Pulses.

Main reason For U0284 Code

The reason of U0284 OBD-II Engine Trouble Code is Manifold Absolute Pressure/Barometric Pressure Circuit High Input.

U0284 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.

	Example: 0140