OBD Guide
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B1D51

Adjustable Pedal Inhibit Circuit Open

B1D51 is an OBD-II diagnostic trouble code meaning: Adjustable Pedal Inhibit Circuit Open. Common causes: broken or damaged interlock circuit wiring harness, pedal lock 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 adjust pedal position
  • Malfunction indicator light comes on
  • Emergency mode of operation of the pedal adjustment system

Causes

  • Broken or damaged interlock circuit wiring harness
  • Pedal lock solenoid malfunction
  • Problems with the adjustable pedal control module
  • Corrosion or poor contact in circuit connectors

How to Fix

  1. Check the wiring harness for breaks or damage
  2. Check the resistance and operation of the locking solenoid
  3. Check the contacts and connectors of the circuit
  4. Check the power and ground of the interlock circuit
  5. Replace damaged components if necessary

Related codes

B1D50B1D52

FAQ

What does the B1D51 code mean?

B1D51 is an OBD-II diagnostic trouble code that indicates: Adjustable Pedal Inhibit Circuit Open

What causes a B1D51 error code?

The most common causes of B1D51 include: Broken or damaged interlock circuit wiring harness; Pedal lock solenoid malfunction; Problems with the adjustable pedal control module; Corrosion or poor contact in circuit connectors.

How do I fix a B1D51 diagnostic trouble code?

To fix B1D51: Check the wiring harness for breaks or damage. Check the resistance and operation of the locking solenoid. Check the contacts and connectors of the circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1D51?

Limited driving only, diagnose soon

How much does it cost to fix B1D51?

The estimated repair cost for B1D51 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat