Brake Switch Circuit Failure
Indicates a fault in the brake switch circuit.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The brake switch is not sending the correct signal to the computer when you press the brake pedal, which can cause issues with systems relying on brake status, like the ABS or traction control.
What the computer is actually seeing
The brake switch should be closed (0 volts) when the brake is pressed and open (battery voltage, approx. 12-14 volts) when released. If the computer sees a fault in this signal, it throws the C0245 code.
What a healthy reading looks like
0 volts when brake pedal is pressed; 12-14 volts when released.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the brake switch for physical damage or misalignment. Reposition or replace if necessary.
- 22. Check all wiring and connectors leading to the brake switch for corrosion or damage. Fix any issues found.
- 33. Use a multimeter to test the brake switch: it should show 0 volts with the pedal pressed and 12-14 volts when released. If not, replace the switch.
- 44. Check for any related fault codes with a scanner; clear them and see if C0245 returns after testing the brake system.
- 55. If the problem persists, test the ABS module and wiring for faults, as they may be causing the issue.
Common causes
- Faulty brake switch
- Wiring issues or shorts in the brake switch circuit
- Corroded or loose connectors
- Faulty ABS module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's driveable but not recommended as it may affect brake-dependent systems.
Will the code come back after clearing it?
Yes, if the underlying issue isn't fixed, the code will likely return.
Why does this code sometimes appear with traction control issues?
Because the brake switch signal is crucial for systems like traction control; faults in this signal can disable those safety features.
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