C0778 Mercedes 122f 16hp OBD Code

OBD/2 C0778 error code description and symptoms.

Throttle Position (TP) Sensor Intermittent The TP sensor circuit is monitored by the PCM for sudden TP rotation angle (or voltage) input change through the comprehensive component monitor (CCM). If during the last 80 warm-up cycles in key ON engine running the PCM detects a TP rotation angle (or voltage) changes beyond the minimum or maximum calibrated limit, a continuous diagnostic trouble code (DTC) is stored. Poor continuity through the TP sensor connectors Poor continuity through the TP harness Intermittent open or short inside the TP sensor While accessing the TP V PID on the scan tool, lightly tap on the TP sensor or wiggle the TP sensor connector and harness.

A good starting point in your diagnosis is checking all system fuses and fusible links. This can be done using the DVOM on the voltage setting. You will want to test the fuses with circuits loaded. Some fuses will appear normal until a load is placed on their respective circuit; at which point they will fail. This has been the cause of many 'phantom malfunctions'. Consult your vehicle information source for fuse and fusible link locations. If all fuses are in working order, you may want to check TCM relay operation by swapping identical relays. Usually the horn relay, starter relay, fuel pump relay, air conditioning clutch relay, and controller relays are similar enough in design to swap for diagnostic purposes.

C0778 Mercedes 122f 16hp Error Code Repair Process :

If your rear fog lamp switch circuit failure 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 C0778 and engine control unit are in charge of monitoring a bunch of different rear fog lamp switch circuit failure, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Mercedes 122f 16hp C0778 OBD2 Code

A common cause of code C0778 is the failure of Rear Fog Lamp Switch Circuit Failure, but there are several other possible causes as well, such as ;

Damaged VCT phaser
Failures of clutch motion/travel sensors.
Faulty Mass Air Flow (MAF) sensor
Oil Control Valve (OCV) circuit is open or shorted

C0778 is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

C0778 Mercedes 122f 16hp OBD Code

C0778 Mercedes 122f 16hp Error Code Repair Process :

Common Causes of Mercedes 122f 16hp C0778 OBD2 Code

C0778 code for other Mercedes cars