P1043 – BMW DTC

BMW DTC P1043 – Internal VVL-Control Module Read Only Memory (ROM) Error (Bank 1)

DTC P1043 meaning on BMW

DTC P1043 on a BMW indicates an Internal Variable Valve Lift-Control Module Read Only Memory (ROM) Error in Bank 1. This fault code is related to the engine’s Variable Valve Lift (VVL) system, which controls the opening and closing of the engine’s intake and exhaust valves for optimal performance.

BMW DTC P1043 symptoms

Symptoms of DTC P1043 on a BMW may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Reduced engine performance
• Engine misfires
• Increased fuel consumption

BMW DTC P1043 causes

The potential causes of DTC P1043 on a BMW include:

• Corrupted or faulty ROM data in the VVL-Control Module
• Wiring or connection issues in the VVL-Control Module circuit
• Defective VVL-Control Module

BMW DTC P1043 seriousness

DTC P1043 should be addressed promptly as it can lead to engine performance issues and potentially cause further damage if left unresolved. Ignoring this fault code may result in increased fuel consumption, reduced engine power, and potential drivability issues.

How to diagnose DTC P1043 on BMW

To diagnose DTC P1043 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and associated data
2. Inspect the wiring and connections related to the VVL-Control Module
3. Check the ROM data in the VVL-Control Module for any corruption
4. Perform a visual inspection of the VVL-Control Module for any signs of damage

How to fix DTC P1043 on BMW

To fix DTC P1043 on a BMW, the following steps may be taken:

1. Clear the fault code using a diagnostic scanner and monitor for recurrence
2. Repair any wiring or connection issues in the VVL-Control Module circuit
3. Update or reprogram the ROM data in the VVL-Control Module if necessary
4. Replace the VVL-Control Module if it is found to be defective

How to erase DTC P1043 on BMW

To erase DTC P1043 on a BMW, follow these steps:

1. Use a diagnostic scanner to clear the fault code from the vehicle’s memory
2. Ensure that the underlying issue causing the fault code has been addressed
3. Perform a test drive to confirm that the fault code does not reappear

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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