Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic trouble code (DTC) information
Condition
The control modules exchange information over a network via a standardized serial communication interface - CAN (Controller Area Network). Control modules transmit and receive information. Diagnostic trouble code (DTC) ABS-0091 is stored if the ABS control module registers that communication is missing or subject to interference.
In the event of an ABS system communication fault it is not possible to communicate with the ABS control module. Therefore it will only be possible to read off the fault if it is intermittent.
Substitute Value
- CAN communication blocked.
- Anti-spin function blocked.
Possible Source
- Contact resistance in terminals.
- Open-circuit in one or both signal cables.
- Short-circuit to ground, voltage or each other in one or both signal cables.
- Interference in wiring.
- Defective control module.
Fault symptom[s]
- ABS warning lamp lit.
- Anti-spin warning lamp lit.
- Brake circuit not functioning, warning lamp lit.
- Anti-spin does not function.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.