B15C4 BMW Fault Code

Description:

The Throttle Position sensor signals the Engine Control Module as to the current position of the engine throttle valve.
The current throttle valve opening is based on the driver's input from the gas pedal.

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

B15C4 Code Symptoms :

There are currently two main types of cylinder deactivation used today, depending on the type of engine. B15C4 code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed.

Diagnosis And Repairing B15C4

B15C4 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 B15C4 code ?

• Faulty Air Flow Meter
• Faulty Camshaft Position Sensor
• Exhaust gas leaks
• Damaged VCT phaser

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code B15C4, so consult the manual to locate the brake fluid reservoir.

Bear in mind that a low fluid level can set code B15C4 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.