C3879 BMW Fault Code

Description:

The Camshaft Position sensor will signal the Engine Control Module when the #1 cylinder is ready for the spark plug to fire (top-dead-center on compression stroke).

The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

C3879 Code Symptoms :

When you turn on the ignition, the Service Engine Soon or Check Engine C3879 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the C3879!

Diagnosis And Repairing C3879

C3879 OBD 2 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.

How to fix C3879 code ?

• Exhaust gas leaks
• Failures of clutch motion/travel sensors.
• Faulty Air fuel ratio (A/F) Sensor 1 Bank 1
• Faulty select solenoid

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code C3879, so consult the manual to locate the brake fluid reservoir.

Bear in mind that a low fluid level can set code C3879 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.