C0161

Brake Switch Circuit Malfunction

Q: What does fault code C0161 mean?

Brake Switch Circuit Malfunction. Brake light switch (pedal switch) circuit fault — this also affects cruise control and brake shift interlock on many vehicles.

Q: What are the symptoms of C0161?

Brake lights not working correctly; Cruise control won't engage; Shifter won't release from Park

Q: What are the possible causes of C0161?

Faulty brake switch; Misadjusted switch; Wiring issue

Q: How to fix C0161?

Test and adjust/replace brake switch; Check wiring

Severity: Medium ABS/Chassis Control Generic OBD-II Code Est. Repair: $30 - $120

Schedule diagnosis soon. Continued driving may worsen the issue.

Quick Answer

C0161 means “Brake Switch Circuit Malfunction.” Severity: Medium. Estimated repair cost: $30 - $120. Most common sign: Brake lights not working correctly.

What Does C0161 Mean?

Brake light switch (pedal switch) circuit fault — this also affects cruise control and brake shift interlock on many vehicles.

Common Symptoms

Brake lights not working correctly

Cruise control won't engage

Shifter won't release from Park

Possible Causes

Faulty brake switch

Misadjusted switch

Wiring issue

How to Fix C0161 – Repair Guide

Test and adjust/replace brake switch

Check wiring

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Budgeting for This Repair?

A typical C0161 repair runs about $30 - $120. If you'd rather spread the cost over time, estimate the payment with our free sister tool: Car Finance Calculator (50-state sales tax, trade-in equity, full amortization).

Recommended OBD2 Scanners & Tools

To read and clear this code yourself, you need a reliable OBD2 scanner. Here are top-rated options:

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Disclaimer: Information is for educational reference only and does not replace professional diagnosis. Actual causes and costs vary by vehicle make, model, year and condition. Always verify with a qualified technician.