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U3956 Engine Trouble Code

Meaning of U3956 engine trouble code is a kind of network trouble code and theoretically you can drive for a few weeks or even months with a broken MAF sensor. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot. At a shop, the replacement cost is between $240-$400 depending on the car, but that's usually the cost of parts because the labor is relatively simple.

U3956 Fault Symptoms :

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

If one of these reasons for U3956 code is occuring now you should check U3956 repair processes.
Now don't ask yourself; What should you do with U3956 code ?
The solution is here :

U3956 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.

U3956 Code Meaning :

U	3	9	5	6
OBD-II Diagnostic Network (U) Trouble Code For Engine	Ignition System Or Misfire	Injector Circuit Malfunction - Cylinders	Cylinder 1 Injector Circuit Low	Ignition Coil A Primary/Secondary Circuit Malfunction

The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue.

U3956 OBD-II Diagnostic Network (U) Trouble Code Description

U3956 engine trouble code is about Ignition Coil A Primary/Secondary Circuit Malfunction.

Main reason For U3956 Code

The reason of U3956 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.

U3956 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