P256B BMW Fault Code
Check P256B OBD Fault Code ReasonFuel Rail Pressure Sensor in Range But Low The comprehensive component monitor (CCM) monitors the FRP pressure for acceptable fuel pressure. The test fails when the fuel pressure falls below a calibrated value.
Low fuel pressure Damaged BMW FRP sensor Excessive resistance in circuit Low or no fuel A FRP PID value below 551 kpa (80 psi) indicates a failure Low or no fuel A FRP PID value greater than 896 kpa (130 psi) indicates a failure.
P256B Code Symptoms :
When you turn on the ignition, the Service Engine Soon or Check Engine P256B 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 P256B!
Diagnosis And Repairing P256B
P256B 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 P256B code ?
- 1Camshaft Position Sensor circuit poor electrical connection
- Damaged ECM
- Erratic camshaft position due to low oil pressure
- 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 P256B, so consult the manual to locate the brake fluid reservoir.
Bear in mind that a low fluid level can set code P256B on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.
