OBD Guide

B051D

Right Side Assist Step Position Sensor Circuit

B051D is an OBD-II diagnostic trouble code meaning: Right Side Assist Step Position Sensor Circuit. Common causes: broken or damaged wiring to the sensor, malfunction of the position sensor itself. Estimated repair cost: $56–167.

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

Symptoms

  • Side step does not extend automatically
  • Intermittent stage operation
  • The system issues a warning on the instrument panel
  • Step gets stuck in one position

Causes

  • Broken or damaged wiring to the sensor
  • Malfunction of the position sensor itself
  • Corrosion of contacts in connectors
  • Problems with the system control unit
  • Mechanical damage to stage or sensor

How to Fix

  1. Conduct a visual inspection of wiring and connectors
  2. Check sensor resistance (compare with nominal values)
  3. Scan the control unit for additional errors
  4. If necessary, replace the position sensor
  5. Clean contacts and treat with protective compound
  6. Check the operation of the system after repair

Related codes

Error B051D by Vehicle Brand

FAQ

What does the B051D code mean?

B051D is an OBD-II diagnostic trouble code that indicates: Right Side Assist Step Position Sensor Circuit

What causes a B051D error code?

The most common causes of B051D include: Broken or damaged wiring to the sensor; Malfunction of the position sensor itself; Corrosion of contacts in connectors; Problems with the system control unit.

How do I fix a B051D diagnostic trouble code?

To fix B051D: Conduct a visual inspection of wiring and connectors. Check sensor resistance (compare with nominal values). Scan the control unit for additional errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B051D?

Limited driving only, diagnose soon

How much does it cost to fix B051D?

The estimated repair cost for B051D is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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