B0997
Auxiliary Electronic Control Unit Performance
B0997 is an OBD-II diagnostic trouble code meaning: Auxiliary Electronic Control Unit Performance. Common causes: malfunction of the auxiliary control unit, problems with wiring harness or connections. Estimated repair cost: $56–222.
Symptoms
- Check Engine light comes on
- Reduced efficiency of connected systems
- Incorrect operation of auxiliary functions (for example, climate control, airbags)
Causes
- Malfunction of the auxiliary control unit
- Problems with wiring harness or connections
- Software errors in the control unit
- Short circuit or open circuit
How to Fix
- Carry out diagnostics using an OBD-II scanner to clarify the problem
- Check the integrity of the wiring harness and connections
- Update or reflash the control unit software
- If necessary, replace the faulty control unit
Related codes
Error B0997 by Vehicle Brand
FAQ
What does the B0997 code mean?
B0997 is an OBD-II diagnostic trouble code that indicates: Auxiliary Electronic Control Unit Performance
What causes a B0997 error code?
The most common causes of B0997 include: Malfunction of the auxiliary control unit; Problems with wiring harness or connections; Software errors in the control unit; Short circuit or open circuit.
How do I fix a B0997 diagnostic trouble code?
To fix B0997: Carry out diagnostics using an OBD-II scanner to clarify the problem. Check the integrity of the wiring harness and connections. Update or reflash the control unit software. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0997?
Limited driving only, diagnose soon
How much does it cost to fix B0997?
The estimated repair cost for B0997 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat