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U3291 Engine Trouble Code

Meaning of U3291 engine trouble code is a kind of network trouble code and when the check engine light comes U3291 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.

U3291 Fault Symptoms :

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

If one of these reasons for U3291 code is occuring now you should check U3291 repair processes.
Now don't ask yourself; What should you do with U3291 code ?
The solution is here :

U3291 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.

U3291 Code Meaning :

U	3	2	9	1
OBD-II Diagnostic Network (U) Trouble Code For Engine	Ignition System Or Misfire	Manifold Absolute Pressure/Barometric Pressure Circuit High Input	Crankshaft Position Sensor A Circuit Malfunction	Crankshaft Position Sensor A Circuit Low Input

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.

U3291 OBD-II Diagnostic Network (U) Trouble Code Description

U3291 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Main reason For U3291 Code

The reason of U3291 OBD-II Engine Trouble Code is Manifold Absolute Pressure/Barometric Pressure Circuit High Input.

Parts or components should not be replaced with reference to only a U3291 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

	Example: 0140