BMW DTC C1091 – Internal DSC Control Module Valve Coil ‘H’ Circuit Electrical
DTC C1091 meaning on BMW
DTC C1091 on a BMW refers to an Internal DSC (Dynamic Stability Control) Control Module Valve Coil ‘H’ Circuit Electrical fault. This fault code indicates an issue with the electrical circuit related to the valve coil ‘H’ within the DSC control module.
BMW DTC C1091 symptoms
Symptoms of DTC C1091 on a BMW may include:
- ABS (Anti-lock Braking System) warning light illuminated on the dashboard
- Stability control system malfunction warning
- Decreased stability and traction control
BMW DTC C1091 causes
Common causes of DTC C1091 on a BMW include:
- Faulty DSC control module
- Wiring or connection issues in the valve coil ‘H’ circuit
- Corrosion or damage to electrical connectors
BMW DTC C1091 seriousness
The seriousness of DTC C1091 on a BMW depends on the driving conditions and the extent of the issue. Driving with a malfunctioning DSC control module can compromise the vehicle’s stability and safety systems, so it is recommended to address the problem promptly.
How to diagnose DTC C1091 on BMW
To diagnose DTC C1091 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the DSC control module and related wiring for visible damage
- Test the electrical connections and components in the valve coil ‘H’ circuit
How to fix DTC C1091 on BMW
To fix DTC C1091 on a BMW, the following steps may be taken:
- Replace the faulty DSC control module if necessary
- Repair or replace any damaged wiring or connectors in the valve coil ‘H’ circuit
- Clear the fault codes and perform a test drive to ensure the issue is resolved
How to erase DTC C1091 on BMW
To erase DTC C1091 on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the vehicle’s system. After addressing the underlying issue and making the necessary repairs, the fault codes can be reset to ensure the warning lights are no longer illuminated.
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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