C05D7 — Brake Transmission Shift Interlock (BTSI) Control Circuit

What Does C05D7 Mean?

C05D7 is a diagnostic trouble code indicating: Brake Transmission Shift Interlock (BTSI) Control Circuit. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of C05D7

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Brake Transmission Shift Interlock (BTSI) readings
⚠️ Related system operating intermittently
⚠️ ABS or stability control warning light

Common Causes

🔍 Wiring issue in Brake Transmission Shift Interlock (BTSI) circuit (damaged, chafed, or corroded)
🔍 Faulty Brake Transmission Shift Interlock (BTSI) connector or terminal
🔍 Failed Brake Transmission Shift Interlock (BTSI)
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does C05D7 mean?

C05D7 indicates: Brake Transmission Shift Interlock (BTSI) Control Circuit. The vehicle's computer has detected that the Brake Transmission Shift Interlock (BTSI) is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code C05D7?

Only short distances if absolutely necessary. C05D7 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix C05D7?

Repair costs for C05D7 typically range from $100 to $400, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and repair Brake Transmission Shift Interlock (BTSI) wiring and connectors
🔧 Replace faulty Brake Transmission Shift Interlock (BTSI)

1
Find your vehicle above
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2
Check for recalls
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

C05D7: Brake Transmission Shift Interlock (BTSI) Control Circuit