U0188 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.

U0188 Code Symptoms :

The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. U0188 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 U0188

U0188 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 U0188 code ?

• Exhaust gas leaks
• Faulty Variable Camshaft Timing (VCT) position solenoid
• Intake Valve Timing Control Solenoid Valve circuit poor electrical connection
• Intake Valve Timing Control Solenoid Valve circuit poor electrical connection

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code U0188, so consult the manual to locate the brake fluid reservoir.

Bear in mind that a low fluid level can set code U0188 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.