U1878 Trouble Code

View U1878 obd/2 error code description and symptoms. U1878 engine photo

Mass Air Flow (MAF) Sensor Intermittent The MAF sensor circuit is monitored by the PCM for sudden voltage (or air flow) input change through the comprehensive component monitor (CCM). If during the last 40 warm-up cycles in key ON engine running the PCM detects a voltage (or air flow) change beyond the minimum or maximum calibrated limit, a continuous memory diagnostic trouble code (DTC) is stored.

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.

U1878 Error Code Repair Process :

If your wiper rear motor up relay coil circuit short to ground 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 U1878 and engine control unit are in charge of monitoring a bunch of different wiper rear motor up relay coil circuit short to ground, and if they get a reading that's a little out of whack, up pops the check engine light.

U1878 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 U1878

A common cause of code U1878 is the failure of Wiper Rear Motor Up Relay Coil Circuit Short To Ground, but there are several other possible causes as well, such as ;

Damaged camshaft position (CMP) sensor
Continuous oil flow to the VCT piston chamber
Ignition misfiring
Ignition coils harness is open or shorted

U1878 code for all cars

You can view according U1878 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U1878 Cadillac Seville

+U1878 Cottin-desgouttes 60

+U1878 Mercedes Cl 600

+U1878 Mastretta Mxt

+U1878 Messerschmitt Tg

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