U3748 Trouble Code

View U3748 obd/2 error code description and symptoms. U3748 engine photo

Fuel Rail Pressure Sensor in Range But Low The comprehensive component monitor (CCM) monitors the FRP pressure for acceptable fuel pressure. The test fails when the fuel pressure falls below a calibrated value. Low fuel pressure Damaged FRP sensor Excessive resistance in circuit Low or no fuel A FRP PID value below 551 kpa (80 psi) indicates a failure Low or no fuel A FRP PID value greater than 896 kpa (130 psi) indicates a failure.

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.

U3748 Error Code Repair Process :

If your fuel demand command signal 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 U3748 and engine control unit are in charge of monitoring a bunch of different fuel demand command signal circuit malfunction, and if they get a reading that's a little out of whack, up pops the check engine light.

U3748 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.

Common Causes of U3748

A common cause of code U3748 is the failure of Fuel Demand Command Signal Circuit Malfunction, but there are several other possible causes as well, such as ;

Erratic camshaft position due to low oil pressure
Faulty Air Flow Meter
Exhaust tube
Loss of ground.

U3748 code for all cars

You can view according U3748 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U3748 Mitsubishi Nessie

+U3748 Zil 4104

+U3748 Cisitalia 303

+U3748 Ascari Fg-t

+U3748 Wartburg Estate

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