BMW DTC C1121 – Power Steering Control Module EEPROM Error
DTC C1121 meaning on BMW
DTC C1121 on a BMW refers to a Power Steering Control Module EEPROM Error. This error code indicates a problem with the power steering control module’s EEPROM, which is a type of memory chip that stores important data for the module’s operation.
BMW DTC C1121 symptoms
Symptoms of DTC C1121 on a BMW may include:
- Loss of power steering assistance
- Stiff or heavy steering feel
- Warning light on the dashboard
BMW DTC C1121 causes
The Power Steering Control Module EEPROM Error (DTC C1121) on a BMW can be caused by various factors, including:
- Corrupted data in the EEPROM
- Faulty power steering control module
- Electrical issues
BMW DTC C1121 seriousness
The seriousness of DTC C1121 on a BMW depends on the extent of the issue. While it may initially cause inconvenience due to the loss of power steering assistance, continued driving with this error unresolved can lead to safety concerns and potential damage to other steering components.
How to diagnose DTC C1121 on BMW
To diagnose DTC C1121 on a BMW, a mechanic would typically:
- Use a diagnostic scanner to retrieve the error code
- Inspect the power steering control module and associated wiring for any visible damage
- Perform tests to check the functionality of the power steering system
How to fix DTC C1121 on BMW
Fixing DTC C1121 on a BMW may involve:
- Repairing or replacing the power steering control module
- Resetting or reprogramming the EEPROM
- Addressing any underlying electrical issues
How to erase DTC C1121 on BMW
To erase DTC C1121 on a BMW, the error code can be cleared using a diagnostic scanner or by disconnecting the vehicle’s battery for a few minutes. However, it is important to address the root cause of the error code to prevent it from reoccurring.
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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