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U0603 Engine Trouble Code

Meaning of U0603 engine trouble code is a kind of network trouble code and when your car's 'U0603 Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.

U0603 Fault Symptoms :

  1. Check engine light comes on
  2. Engine stalling or misfiring
  3. Engine performance issues
  4. Car not starting
If one of these reasons for U0603 code is occuring now you should check U0603 repair processes.
Now don't ask yourself; What should you do with U0603 code ?
The solution is here :

U0603 Possible Solution:

U0603 Engine

Gasoline engines use spark plugs to cause an explosion of fuel within the cylinder. In a properly timed engine, this explosion occurs at the proper moment to send the piston to the bottom of the cylinder and provide power to the drive shaft. If the plug wires are out of sequence, the explosion occurs at the wrong time. The improper timing of the explosion sometimes pushes the cylinder the wrong direction or interferes with the turning of the crank. As a result, the engine stutters or backfires, if it runs at all.

U0603 Code Meaning :

U 0 6 0 3
OBD-II Diagnostic Network (U) Trouble Code For Engine Intake Valve Control Solenoid Circuit Low Fuel Temperature Sensor B Circuit Range/Performance Cold Start Injector 1 Malfunction Exhaust Gas Recirculation Sensor B Circuit High

Is the fuel pump sometimes not priming when you turn the key to ON(II)? Start by measuring the fuel pressure and checking whether you have bright white-bluish spark at all four plugs. The mechanical timing is also something that you should check, as we mentioned above.

U0603 OBD-II Diagnostic Network (U) Trouble Code Description

U0603 engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

Main reason For U0603 Code

The reason of U0603 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

U0603 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.