B0688
Security System Indicator Circuit High
B0688 is an OBD-II diagnostic trouble code meaning: Security System Indicator Circuit High. Common causes: short circuit in indicator circuit, security indicator malfunction. Estimated repair cost: $33–111.
Symptoms
- Security light stays on or doesn't work
- False alarms of the security system
- Security system fault message on dashboard
Causes
- Short circuit in indicator circuit
- Security indicator malfunction
- Wiring harness damage
- Problems with the security module
How to Fix
- Check the integrity of the wiring harness in the area of the security system indicator
- Check the functionality of the indicator itself
- Measure the voltage in the indicator circuit
- If necessary, replace the indicator or repair the wiring harness
- Reset the error and check if it returns
Related codes
Error B0688 by Vehicle Brand
FAQ
What does the B0688 code mean?
B0688 is an OBD-II diagnostic trouble code that indicates: Security System Indicator Circuit High
What causes a B0688 error code?
The most common causes of B0688 include: Short circuit in indicator circuit; Security indicator malfunction; Wiring harness damage; Problems with the security module.
How do I fix a B0688 diagnostic trouble code?
To fix B0688: Check the integrity of the wiring harness in the area of the security system indicator. Check the functionality of the indicator itself. Measure the voltage in the indicator circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0688?
Do not drive — repair immediately
How much does it cost to fix B0688?
The estimated repair cost for B0688 is $33–111. Actual cost depends on your vehicle, location, and labor rates.
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