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U3431 Engine Trouble Code

Meaning of U3431 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.

U3431 Fault Symptoms :

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

If one of these reasons for U3431 code is occuring now you should check U3431 repair processes.
Now don't ask yourself; What should you do with U3431 code ?
The solution is here :

U3431 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.

U3431 Code Meaning :

U	3	4	3	1
OBD-II Diagnostic Network (U) Trouble Code For Engine	Ignition System Or Misfire	O2 Sensor Heater Circuit Malfunction	Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)	Crankshaft Position Sensor A Circuit Low Input

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.

U3431 OBD-II Diagnostic Network (U) Trouble Code Description

U3431 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Main reason For U3431 Code

The reason of U3431 OBD-II Engine Trouble Code is O2 Sensor Heater Circuit Malfunction.

U3431 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