U1139 Engine Trouble Code
Meaning of U1139 engine trouble code is a kind of network trouble code and when the check engine light comes U1139 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.
U1139 Fault Symptoms :
If one of these reasons for U1139 code is occuring now you should check U1139 repair processes.
Now don't ask yourself; What should you do with U1139 code ?
The solution is here :
U1139 Possible Solution:
Gasoline engines use spark plugs to cause an explosion of fuel within the cylinder. In a properly timed engine, this explosion occurs at the proper moment to send the piston to the bottom of the cylinder and provide power to the drive shaft. If the plug wires are out of sequence, the explosion occurs at the wrong time. The improper timing of the explosion sometimes pushes the cylinder the wrong direction or interferes with the turning of the crank. As a result, the engine stutters or backfires, if it runs at all.
U1139 Code Meaning :
|OBD-II Diagnostic Network (U) Trouble Code For Engine||Fuel And Air Metering||Fuel Rail/System Pressure - Too High||Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)||Reverse Input Circuit|
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.
U1139 OBD-II Diagnostic Network (U) Trouble Code DescriptionU1139 engine trouble code is about Reverse Input Circuit.
Main reason For U1139 CodeThe reason of U1139 OBD-II Engine Trouble Code is Fuel Rail/System Pressure - Too High.
U1139 DTC reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.