What does code P1531 mean?

Q: What does code P1531 mean?

B Camshaft Position Actuator Control Open Circuit Bank 1. P1531 on BMW vehicles indicates that the engine control module has detected an open circuit in the electrical path for the Bank 1 B camshaft position actuator, which is the variable valve timing solenoid responsible for adjusting the intake or exhaust camshaft on that bank. The computer commands the actuator to change cam timing but sees no current flow or an unexpected voltage on the control wire, so it flags the circuit as open and disables the variable valve timing function for that camshaft.

DTC codes / BMW codes / P1531

P1531 · BMWB Camshaft Position Actuator Control Open Circuit Bank 1

P1531 on BMW vehicles indicates that the engine control module has detected an open circuit in the electrical path for the Bank 1 B camshaft position actuator, which is the variable valve timing solenoid responsible for adjusting the intake or exhaust camshaft on that bank. The computer commands the actuator to change cam timing but sees no current flow or an unexpected voltage on the control wire, so it flags the circuit as open and disables the variable valve timing function for that camshaft.

SystemPowertrain

Code typeBMW specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for BMW vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.