Engine-Codes - Gmc - B051C GMC

B051C GMC Code - Left Side Assist Step Position Sensor Circuit

Repair Importance Level: 1/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

|B051C GMC code possible causes

  • Faulty Left Side Assist Step Position Sensor
  • Left Side Assist Step Position Sensor harness is open or shorted
  • Left Side Assist Step Position Sensor circuit poor electrical connection
  • Faulty Assist Step Control Module (ASC)

|How is the B051C GMC code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|B051C GMC code tech notes

B051C 62 Left Side Assist Step Position Sensor Circuit Actuator Stuck Open
B051C 63 Left Side Assist Step Position Sensor Circuit Actuator Stuck Closed
B051C 02 Left Side Assist Step Position Sensor Circuit Short to Ground
B051C 29 Left Side Assist Step Position Sensor Circuit Too Few Pulses
B051C 01 Left Side Assist Step Position Sensor Circuit Short to Battery
B051C 2A Left Side Assist Step Position Sensor Circuit Too Many Pulses
B051C 22 Left Side Assist Step Position Sensor Circuit Low Time < Minimum

|What is the cost to diagnose the B051C GMC code

Labor: 1.0

The cost to diagnose the B051C GMC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B051C GMC code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What is B051C GMC code meaning?

The Assist Step Control Module (ASC) controls the running board actuators to extend or retract the running boards. Each actuator consists of an electric motor and a potentiometer. The module supplies a low reference and 10-volt reference source voltage to the potentiometer. The ASC control module monitors the voltage drop across the potentiometer on the position signal circuit. When the actuator shaft rotates, the voltage on the position signal circuit changes. The ASC control module supplies the actuator motor with a 12-volt control circuit and a ground control circuit. The ASC module controls the direction of the actuator by changing the polarity of the control circuits.

|Need more information with the B051C GMC code?

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