BMW DTC P1099 – VVL-Value Comparison Starting Position/Parking Position Correlation (Bank 2)
DTC P1099 meaning on BMW
The DTC P1099 for BMW refers to the VVL-Value Comparison Starting Position/Parking Position Correlation error on Bank 2. This code indicates a problem with the Variable Valve Lift system, specifically related to the comparison between the starting position and parking position on Bank 2 of the engine.
BMW DTC P1099 symptoms
Symptoms of BMW DTC P1099 may include rough idling, loss of power, engine misfires, decreased fuel efficiency, and in some cases, the vehicle may go into limp mode. The Check Engine Light will also be illuminated on the dashboard.
BMW DTC P1099 causes
The common causes of BMW DTC P1099 include issues with the Variable Valve Lift system components such as faulty VVL sensors, wiring problems, or mechanical issues with the VVL system itself. It can also be triggered by a malfunction in the engine control module (ECM).
BMW DTC P1099 seriousness
While the BMW DTC P1099 code may not cause immediate harm to the vehicle, it can lead to poor engine performance and potentially cause further damage if left unresolved. It is recommended to address this issue promptly to prevent any long-term issues.
How to diagnose DTC P1099 on BMW
To diagnose BMW DTC P1099, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s ECM. They would then inspect the VVL system components, including sensors, wiring, and actuators, for any signs of damage or malfunction. Testing the VVL system’s operation and comparing it to manufacturer specifications would help pinpoint the issue.
How to fix DTC P1099 on BMW
Fixing BMW DTC P1099 usually involves repairing or replacing the faulty VVL system components identified during the diagnostic process. This may include replacing sensors, repairing wiring, or addressing mechanical issues with the VVL system. It is crucial to follow manufacturer guidelines and use quality parts to ensure a proper repair.
How to erase DTC P1099 on BMW
Once the underlying issue causing BMW DTC P1099 has been resolved, the fault codes can be cleared using a diagnostic scanner. By clearing the codes, the Check Engine Light will turn off, indicating that the issue has been addressed. It is important to verify that the problem has been fixed before clearing the fault codes.
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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