Brake Switch Circuit Voltage Low
The brake switch circuit voltage is below the normal range.
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 isn’t sending the right amount of voltage to the computer, which can affect braking operations.
What the computer is actually seeing
The computer expects a voltage between 4.5V to 5.5V from the brake switch when the pedal is pressed; anything below that indicates a problem.
What a healthy reading looks like
4.5V to 5.5V from brake switch when activated, 0V when not pressed.
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. Check the brake fluid level; ensure it's at the proper level.
- 22. Inspect the brake switch and its connector for damage or corrosion; repair/clean as needed.
- 33. Using a multimeter, measure the voltage at the brake switch harness while the pedal is pressed. Is it between 4.5V and 5.5V? If no, go to step 4. If yes, the switch might still be faulty or misaligned.
- 44. Inspect the wiring between the brake switch and the computer for shorts or breaks. Repair any found issues.
- 55. Check the ground connection for any corrosion or poor contact. Clean and secure as necessary.
Common causes
- Faulty brake switch
- Wiring issues in the brake switch circuit
- Corroded or loose connectors
- Voltage drops due to poor ground connections
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; drive with caution but fix soon as braking system reliability is compromised.
Will the issue come back after clearing the code?
If the underlying problem with the brake switch or wiring isn’t resolved, it will likely return.
Why does this code pair with SPN 2195?
Both codes can relate to malfunctioning brake switches and can indicate similar issues in the system.
Working a real vehicle right now?
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