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C0503 Engine Trouble Code

Meaning of C0503 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.

C0503 Fault Symptoms :

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

If one of these reasons for C0503 code is occuring now you should check C0503 repair processes.
Now don't ask yourself; What should you do with C0503 code ?
The solution is here :

C0503 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.

C0503 Code Meaning :

C	0	5	0	3
OBD-II Diagnostic Chassis (C) Trouble Code For Engine	Intake Valve Control Solenoid Circuit Low	Fuel Composition Sensor Circuit Malfunction	Cold Start Injector 1 Malfunction	Exhaust Gas Recirculation Sensor B Circuit High

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.

C0503 OBD-II Diagnostic Chassis (C) Trouble Code Description

C0503 engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Main reason For C0503 Code

The reason of C0503 OBD-II Engine Trouble Code is Fuel Composition Sensor Circuit Malfunction.

C0503 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