C3789 BMW Fault Code

Description:

The issue covered by the bulletin involves a power steering noise/whine or fluid leak from the power steering pump, gear or high pressure side power steering hose during extreme low outdoor temperature operation.

C3789 Code Symptoms :

When you turn on the ignition, the Service Engine Soon or Check Engine C3789 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 C3789!

Diagnosis And Repairing C3789

C3789 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 C3789 code ?

• Continuous oil flow to the VCT piston chamber
• Faulty Variable Camshaft Timing (VCT) position solenoid
• Foreign matter caught in fuel filler cap
• Oil flow restriction in the oil passages or the variable camshaft timing (VCT) valve body