B0987 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.

B0987 Code Symptoms :

The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. B0987 code had an elaborate diagnostics procedure, including showing engine trouble codes on the air conditionning display. However, the system was troublesome, misunderstood by customers, and a rash of unpredictable failures led to the technology being quickly retired.

Diagnosis And Repairing B0987

B0987 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 B0987 code ?

• Continuous oil flow to the VCT piston chamber
• Engine Control Module (ECM)
• Ignition coils harness is open or shorted
• Oil flow restriction in the oil passages or the variable camshaft timing (VCT) valve body

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code B0987, so consult the manual to locate the brake fluid reservoir.

Bear in mind that a low fluid level can set code B0987 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.