B0978
Accessory Indicator Control Circuit
B0978 is an OBD-II diagnostic trouble code meaning: Accessory Indicator Control Circuit. Common causes: open or short circuit in wiring harness, blown fuse. Estimated repair cost: $6–56.
Symptoms
- The accessory indicator does not work
- Flashing or unstable indicator
- No dashboard backlight
Causes
- Open or short circuit in wiring harness
- Blown fuse
- Control unit malfunction
- Problems with contacts in the circuit
How to Fix
- Check the fuses associated with the indicator circuit
- Inspect the wiring harness for damage
- Check contacts and connectors in the circuit
- Test the control unit for faults
- Replace faulty components
Related codes
Error B0978 by Vehicle Brand
FAQ
What does the B0978 code mean?
B0978 is an OBD-II diagnostic trouble code that indicates: Accessory Indicator Control Circuit
What causes a B0978 error code?
The most common causes of B0978 include: Open or short circuit in wiring harness; Blown fuse; Control unit malfunction; Problems with contacts in the circuit.
How do I fix a B0978 diagnostic trouble code?
To fix B0978: Check the fuses associated with the indicator circuit. Inspect the wiring harness for damage. Check contacts and connectors in the circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0978?
Do not drive — repair immediately
How much does it cost to fix B0978?
The estimated repair cost for B0978 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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