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C3946 Engine Trouble Code

Meaning of C3946 engine trouble code is a kind of chassis 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.

C3946 Fault Symptoms :

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

If one of these reasons for C3946 code is occuring now you should check C3946 repair processes.
Now don't ask yourself; What should you do with C3946 code ?
The solution is here :

C3946 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.

C3946 Code Meaning :

C	3	9	4	6
OBD-II Diagnostic Chassis (C) Trouble Code For Engine	Ignition System Or Misfire	Injector Circuit Malfunction - Cylinders	Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)	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.

C3946 OBD-II Diagnostic Chassis (C) Trouble Code Description

C3946 engine trouble code is about Ignition Coil A Primary/Secondary Circuit Malfunction.

Main reason For C3946 Code

The reason of C3946 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.

C3946 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