U3879 Dodge 1500 OBD Code

OBD/2 U3879 error code description and symptoms.

Output Shaft Speed sensor circuit intermittent failure The output shaft speed sensor signal to the PCM is irregular or interrupted.
Harness connector not properly seated Harness intermittently shorted, or open Harness connector damaged OSS sensor damaged, or not installed properly Verify harness and connector integrity Verify OSS sensor proper installation.

On some transmissions, such as automated manual transmissions or automatic transmissions with manual mode, the GSP switch lets the TCM know whether or not the driver has selected automatic or manual function. On manual transmissions, the GSP switch informs the TCM which gear the driver is selecting, and may function as a neutral safety switch, depending on system design. The TCM also uses the gate select position switch to monitor transmission operation. For example, if the driver selects manual mode and selects 3rd gear on an automatic transmission, the TCM may monitor speed sensors to detect clutch and brake slippage.

U3879 Dodge 1500 Error Code Repair Process :

If your transmission 4-wheel drive low clutch relay circuit 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 U3879 and engine control unit are in charge of monitoring a bunch of different transmission 4-wheel drive low clutch relay circuit to ground, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Dodge 1500 U3879 OBD2 Code

A common cause of code U3879 is the failure of Transmission 4-Wheel Drive Low Clutch Relay Circuit To Ground, but there are several other possible causes as well, such as ;

Camshaft Position Sensor harness is open or shorted
Faulty Variable Camshaft Timing (VCT) position solenoid
Camshaft advance mechanism binding (VCT unit)
Faulty front heated oxygen sensor

U3879 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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U3879 Dodge 1500 OBD Code

U3879 Dodge 1500 Error Code Repair Process :

Common Causes of Dodge 1500 U3879 OBD2 Code

U3879 code for other Dodge cars