P2090 – BMW DTC

BMW DTC P2090 – ‘B’ Camshaft Position Actuator Control Circuit Low (Bank 1)

DTC P2090 meaning on BMW

The Diagnostic Trouble Code (DTC) P2090 for BMW refers to the ‘B’ Camshaft Position Actuator Control Circuit Low on Bank 1. This code indicates that there is a detected low voltage condition in the control circuit of the ‘B’ camshaft position actuator for the specified bank.

BMW DTC P2090 symptoms

Symptoms of DTC P2090 on a BMW may include:

• Check Engine Light (MIL) illuminated on the dashboard
• Engine running rough or misfiring
• Reduced engine performance
• Possible stalling or difficulty starting the engine

BMW DTC P2090 causes

Common causes of DTC P2090 on a BMW include:

• Faulty camshaft position actuator
• Wiring or connector issues in the camshaft position actuator circuit
• Low engine oil level or poor oil quality affecting actuator performance
• Internal engine mechanical problems

BMW DTC P2090 seriousness

DTC P2090 should be addressed promptly as it can lead to engine performance issues and potential damage if left unresolved. Ignoring this code may result in further engine problems and increased repair costs over time.

How to diagnose DTC P2090 on BMW

To diagnose DTC P2090 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the wiring and connectors related to the ‘B’ camshaft position actuator
3. Check the camshaft position actuator for proper operation and voltage supply
4. Perform a visual inspection of the engine components for any signs of damage or wear

How to fix DTC P2090 on BMW

To fix DTC P2090 on a BMW, you can try the following:

1. Replace the faulty camshaft position actuator
2. Repair or replace any damaged wiring or connectors in the actuator circuit
3. Ensure the engine oil level and quality are adequate for proper actuator function
4. Address any internal engine mechanical issues if detected

How to erase DTC P2090 on BMW

To erase DTC P2090 on a BMW, you can use a diagnostic scanner to clear the fault code from the vehicle’s memory. After fixing the underlying issue causing the code, clearing the code will reset the Check Engine Light and ensure the repair was successful.

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.