OBD Guide

C05D7

Brake Transmission Shift Interlock (BTSI) Control Circuit

C05D7 is an OBD-II diagnostic trouble code meaning: Brake Transmission Shift Interlock (BTSI) Control Circuit. Common causes: open or short circuit in btsi wiring harness, btsi solenoid malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Inability to change gears without pressing the brake pedal
  • Check Engine Light Illuminates
  • Shift Lever Lock

Causes

  • Open or short circuit in BTSI wiring harness
  • BTSI solenoid malfunction
  • Damage to the brake pedal sensor
  • Software failure in the transmission control module (TCM)
  • BTSI circuit fuse problems

How to Fix

  1. Check the integrity of the BTSI wiring harness
  2. Test the BTSI solenoid for faults
  3. Check the brake pedal sensor
  4. Read trouble codes from the TCM
  5. If necessary, replace faulty components

Related codes

Error C05D7 by Vehicle Brand

FAQ

What does the C05D7 code mean?

C05D7 is an OBD-II diagnostic trouble code that indicates: Brake Transmission Shift Interlock (BTSI) Control Circuit

What causes a C05D7 error code?

The most common causes of C05D7 include: Open or short circuit in BTSI wiring harness; BTSI solenoid malfunction; Damage to the brake pedal sensor; Software failure in the transmission control module (TCM).

How do I fix a C05D7 diagnostic trouble code?

To fix C05D7: Check the integrity of the BTSI wiring harness. Test the BTSI solenoid for faults. Check the brake pedal sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C05D7?

Limited driving only, diagnose soon

How much does it cost to fix C05D7?

The estimated repair cost for C05D7 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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