C3099 BMW Fault Code

Description:

Intake Manifold Runner Control Malfunction (Stuck Open) The IMRC system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test. The test fails when the signal on the monitor pin is less than an expected calibrated range at closed throttle. IMRC monitor signal circuit shorted to BMW PWR GND or SIG RTN Damaged IMRC actuator Damaged PCM An IMRCM PID reading approximately near 1 volt at closed throttle may indicate a fault.

C3099 Code Symptoms :

When you turn on the ignition, the Service Engine Soon or Check Engine C3099 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 C3099!

Diagnosis And Repairing C3099

C3099 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 C3099 code ?

• EVAP canister or fuel tank leaks
• Faulty Mass Air Flow (MAF) sensor
• Ignition coils harness is open or shorted
• Variable Camshaft Timing (VCT) position circuit is open or shorted

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code C3099, so consult the manual to locate the brake fluid reservoir.

Bear in mind that a low fluid level can set code C3099 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.