BMW DTC P2091 – ‘B’ Camshaft Position Actuator Control Circuit High (Bank 1)
DTC P2091 meaning on BMW
The Diagnostic Trouble Code (DTC) P2091 for BMW indicates a fault in the ‘B’ Camshaft Position Actuator Control Circuit on Bank 1. This means that the engine control module (ECM) has detected a high voltage condition in the circuit responsible for controlling the camshaft position actuator on the specified bank.
BMW DTC P2091 symptoms
Symptoms of DTC P2091 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced engine performance or power
- Engine misfires or rough idling
- Increased fuel consumption
BMW DTC P2091 causes
Common causes of DTC P2091 on a BMW include:
- Faulty camshaft position actuator
- Wiring or connector issues in the camshaft position actuator circuit
- ECM software or hardware problems
BMW DTC P2091 seriousness
While DTC P2091 may not always result in immediate drivability issues, it is important to address this fault promptly to prevent potential engine damage or further complications. Ignoring this DTC could lead to more severe problems over time.
How to diagnose DTC P2091 on BMW
To diagnose DTC P2091 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM
- Inspect the wiring and connectors related to the ‘B’ Camshaft Position Actuator Control Circuit
- Test the camshaft position actuator for proper operation
- Check for any ECM software updates or reprogramming that may be required
How to fix DTC P2091 on BMW
To fix DTC P2091 on a BMW, you can consider the following actions:
- Replace the faulty camshaft position actuator if necessary
- Repair any damaged wiring or connectors in the circuit
- Perform any required ECM software updates or reprogramming
- Clear the fault codes from the ECM memory after completing the repairs
How to erase DTC P2091 on BMW
To erase DTC P2091 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM memory. After completing the necessary repairs and ensuring that the issue has been resolved, you can reset the ECM and clear the DTC to turn off the Check Engine Light.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.