U0738 Citroen Aventure OBD Code

OBD/2 U0738 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 long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

U0738 Citroen Aventure Error Code Repair Process :

If your fuel pump secondary circuit malfunction 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 U0738 and engine control unit are in charge of monitoring a bunch of different fuel pump secondary circuit malfunction, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Citroen Aventure U0738 OBD2 Code

A common cause of code U0738 is the failure of Fuel Pump Secondary Circuit Malfunction, but there are several other possible causes as well, such as ;

Engine Control Module (ECM)
Exhaust gas leaks
Faulty ignition coil (s)
Faulty Camshaft Position Sensor

U0738 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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U0738 Citroen Aventure OBD Code

U0738 Citroen Aventure Error Code Repair Process :

Common Causes of Citroen Aventure U0738 OBD2 Code

U0738 code for other Citroen cars