U3403 Bmw S3 OBD Code

OBD/2 U3403 error code description and symptoms.

Engine Coolant Temperature (ECT) Circuit High Input Indicates the sensor signal is greater than Self-Test maximum. The ECT sensor maximum is 4.6 volts or -50 C (-58 F). Note on some vehicles that are not equipped with an ECT sensor, CHT can be used and can set this DTC. Open circuit in harness Sensor signal short to power Damaged PCM Improper harness connection Damaged sensor ECT V PID reading greater than 4.6 volts with key ON and engine OFF or during any engine operating mode indicates a hard fault.

As the engine heats up and combustion becomes easier and more complete, the PCM will command the idling control valve to increase the amount of air entering the engine to suit the changing conditions. However, when the load on the engine changes, say, when some electrical consumers or other systems are either turned on or off, the PCM adapts the signal voltage to the idle control valve to ensure that the idling speed remains stable, and at the RPM specified by the manufacturer.

U3403 Bmw S3 Error Code Repair Process :

If your intercooler pump driver fault check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system U3403 and engine control unit are in charge of monitoring a bunch of different intercooler pump driver fault, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Bmw S3 U3403 OBD2 Code

A common cause of code U3403 is the failure of Intercooler Pump Driver Fault, but there are several other possible causes as well, such as ;

Engine Control Module (ECM)
EVAP canister or fuel tank leaks
Faulty Mass Air Flow (MAF) sensor
Faulty Intake Valve Timing Control Solenoid Valve

U3403 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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U3403 Bmw S3 OBD Code

U3403 Bmw S3 Error Code Repair Process :

Common Causes of Bmw S3 U3403 OBD2 Code

U3403 code for other Bmw cars