OBD Guide

B051C

Left Side Assist Step Position Sensor Circuit

B051C is an OBD-II diagnostic trouble code meaning: Left Side Assist Step Position Sensor Circuit. Common causes: open or short circuit in the sensor circuit, position sensor malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Left side assistant not working
  • The fault indicator lights up
  • The step does not extend or retract

Causes

  • Open or short circuit in the sensor circuit
  • Position sensor malfunction
  • Problems with the control unit

How to Fix

  1. Check the integrity of wiring and connections
  2. Check the functionality of the position sensor
  3. Replace sensor if necessary
  4. Check and reflash the control unit if necessary

Related codes

Error B051C by Vehicle Brand

FAQ

What does the B051C code mean?

B051C is an OBD-II diagnostic trouble code that indicates: Left Side Assist Step Position Sensor Circuit

What causes a B051C error code?

The most common causes of B051C include: Open or short circuit in the sensor circuit; Position sensor malfunction; Problems with the control unit.

How do I fix a B051C diagnostic trouble code?

To fix B051C: Check the integrity of wiring and connections. Check the functionality of the position sensor. Replace sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B051C?

Limited driving only, diagnose soon

How much does it cost to fix B051C?

The estimated repair cost for B051C is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat