U3879 Engine Code Repair
Meaning of U3879 engine trouble code is a kind of network trouble code and when your car's 'U3879 Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.
U3879 Fault Symptoms :
- Check engine light comes on
- Engine stalling or misfiring
- Engine performance issues
- Car not starting
If one of these reasons for U3879 code is occuring now you should check U3879 repair processes.
Now don't ask yourself; What should you do with U3879 code ?
The solution is here :
U3879 Possible Solution:

The firing order is an important part of the overall design of the engine and is determined during the design of the engine to eliminate as much engine vibration as possible. If the firing order is changed or adjusted, the ignition from the spark plug is delivered at the wrong time and the engine functions poorly or does not run. The firing order for a particular engine is typically found in the repair manual specific to that model.
U3879 Code Meaning :
U
OBD-II Diagnostic Network (U) Trouble Code For Engine
3
Ignition System Or Misfire
8
Fuel Rail Pressure Sensor Circuit Malfunction
7
Cylinder 4 Contribution/Balance Fault
9
Clutch Position Sensor Circuit Malfunction
The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and air are in the cylinders. Optimizing this mixture means better fuel economy and fewer exhaust emissions.
U3879 OBD-II Diagnostic Network (U) Trouble Code DescriptionU3879 engine trouble code is about Clutch Position Sensor Circuit Malfunction.Main reason For U3879 CodeThe reason of U3879 OBD-II Engine Trouble Code is Fuel Rail Pressure Sensor Circuit Malfunction. |
U3879 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.