OBD2 code B0691: Driver assistance system
Driver assistance system fault.
Detected Root Component
Body Component
Observed Symptoms
- Dashboard errors
- ESP/ESC light on
Possible Causes
- Defective sensor
- Damaged wiring
- Faulty engine computer (ECU)
- Incorrect module configuration
Tools Required
Interactive Diagnostic
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Diagnostic Result
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Parts likely to be the cause (Boîtier fusibles / BSI)
Boîtier fusibles / BSI
Photo d'illustration : Boîtier fusibles / BSI
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Frequently asked questions about code B0691
What does code B0691 mean? ▾
OBD2 code B0691: Driver assistance system. Driver assistance system fault.
What are the symptoms of code B0691? ▾
Code B0691 may cause: Dashboard errors, ESP/ESC light on. The intensity of these symptoms varies depending on the vehicle and driving conditions.
What causes code B0691? ▾
The most common causes of code B0691 are: Defective sensor, Damaged wiring, Faulty engine computer (ECU), Incorrect module configuration. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code B0691? ▾
Code B0691 has moderate severity (Warning). Short-term driving remains possible, but a prompt check is recommended to prevent worsening.
How do I fix code B0691? ▾
Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Defective sensor, Damaged wiring, Faulty engine computer (ECU), Incorrect module configuration. Difficulty: moderate · Estimated time: 45-60min.