BMW DTC P1581 – ‘B’ Camshaft Position Actuator Control Circuit/Open (Bank 2) (M73: Throttle Valve 2 Spring Test)
DTC P1581 meaning on BMW
The DTC P1581 code on a BMW indicates a fault with the ‘B’ Camshaft Position Actuator Control Circuit/Open in Bank 2. This means that there is an issue with the electrical circuit controlling the camshaft position actuator on the second bank of the engine.
BMW DTC P1581 symptoms
Symptoms of a DTC P1581 on a BMW may include:
- Check Engine Light illuminated
- Engine running rough or misfiring
- Reduced engine performance
- Difficulty starting the engine
BMW DTC P1581 causes
Common causes of a DTC P1581 on a BMW include:
- Faulty camshaft position actuator
- Open or short circuit in the actuator control circuit
- Faulty wiring or connectors
- Engine timing issues
BMW DTC P1581 seriousness
The seriousness of a DTC P1581 on a BMW depends on the underlying cause. Ignoring this code can lead to engine performance issues and potential damage over time. It is recommended to address this code promptly to prevent further problems.
How to diagnose DTC P1581 on BMW
To diagnose a DTC P1581 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the camshaft position actuator and its wiring for any visible damage
- Test the circuit for continuity and proper voltage
- Check the engine timing to ensure proper alignment
How to fix DTC P1581 on BMW
To fix a DTC P1581 on a BMW, the following steps may be taken:
- Replace the faulty camshaft position actuator if necessary
- Repair any open or short circuits in the control circuit
- Inspect and repair any damaged wiring or connectors
- Reset the fault code and test the vehicle for proper operation
How to erase DTC P1581 on BMW
To erase a DTC P1581 on a BMW, a diagnostic scanner can be used to clear the fault code from the vehicle’s memory. After addressing the underlying issue and making the necessary repairs, the code can be reset to ensure that the problem has been resolved.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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