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U2638 Engine Trouble Code

Meaning of U2638 engine trouble code is a kind of network trouble code and when the check engine light comes U2638 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.

U2638 Fault Symptoms :

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

If one of these reasons for U2638 code is occuring now you should check U2638 repair processes.
Now don't ask yourself; What should you do with U2638 code ?
The solution is here :

U2638 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.

U2638 Code Meaning :

U	2	6	3	8
OBD-II Diagnostic Network (U) Trouble Code For Engine	Fuel And Air Metering (Injector Circuit Malfunctions Only)	Fuel Temperature Sensor B Circuit Range/Performance	Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)	Clutch Position Sensor Circuit Malfunction

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.

U2638 OBD-II Diagnostic Network (U) Trouble Code Description

U2638 engine trouble code is about Clutch Position Sensor Circuit Malfunction.

Main reason For U2638 Code

The reason of U2638 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

U2638 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