U203E Smart Forfour OBD Code

OBD/2 U203E 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.

At this point we are assuming that the fuses and relays are good. You will need to locate the PCM/TCM and the power input signal circuit using your vehicle information source. Unplug the connector from the PCM/TCM, place the ignition switch in the ON position, and probe the appropriate circuit with the positive test lead of the DVOM.

U203E Smart Forfour Error Code Repair Process :

If your front wiper motor relay circuit open (changed from failure 2/6/97) 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 U203E and engine control unit are in charge of monitoring a bunch of different front wiper motor relay circuit open (changed from failure 2/6/97), and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Smart Forfour U203E OBD2 Code

A common cause of code U203E is the failure of Front Wiper Motor Relay Circuit Open (changed from Failure 2/6/97), but there are several other possible causes as well, such as ;

Engine Control Module (ECM)
Erratic camshaft position due to low oil pressure
Fuel Injectors circuit poor electrical connection
Faulty Camshaft Position Sensor

U203E 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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U203E Smart Forfour OBD Code

U203E Smart Forfour Error Code Repair Process :

Common Causes of Smart Forfour U203E OBD2 Code

U203E code for other Smart cars