B051C 2016 GMC Sierra Code - Left Side Assist Step Position Sensor Circuit
Quick Answer
The Assist Step Control (ASC) Module controls the running board actuators to extend or retract the running boards. Common causes include Faulty Left Side Assist Step Motor, Left Side Assist Step Motor harness is open or shorted, Left Side Assist Step Motor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B051C 2016 GMC Sierra indicates Left Side Assist Step Position Sensor Circuit.
- Common causes
- Common causes include Faulty Left Side Assist Step Motor, Left Side Assist Step Motor harness is open or shorted, Left Side Assist Step Motor circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code B051C 2016 GMC Sierra Description
What are the Possible Causes of the DTC B051C 2016 GMC Sierra?
- Faulty Left Side Assist Step Motor
- Left Side Assist Step Motor harness is open or shorted
- Left Side Assist Step Motor circuit poor electrical connection
- Faulty Assist Step Control (ASC) Module
How to Fix the DTC B051C 2016 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
B051C:02 Left Side Assist Step Position Sensor Circuit Short to Ground
B051C:22 Left Side Assist Step Position Sensor Circuit Low Time < Minimum
B051C:29 Left Side Assist Step Position Sensor Circuit Too Few Pulses
B051C:2A Left Side Assist Step Position Sensor Circuit Too Many Pulses
B051C:62 Left Side Assist Step Position Sensor Circuit Actuator Stuck Open
B051C:63 Left Side Assist Step Position Sensor Circuit Actuator Stuck Closed
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B051C 2016 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B051C 2016 GMC Sierra Code
What does the OBDII code B051C mean for a 2016 GMC Sierra?
The code B051C indicates an issue with the Left Side Assist Step Position Sensor Circuit, which monitors the deployment and retraction of the left side power running board.
What are the common symptoms of code B051C in a 2016 GMC Sierra?
Symptoms may include the left side assist step not deploying or retracting properly, a warning message on the dashboard, or the assist step being stuck in one position.
What causes the B051C code to appear?
Common causes include a faulty position sensor, damaged wiring or connectors in the assist step circuit, or a malfunctioning control module.
How can I diagnose the B051C code?
Start by inspecting the wiring and connectors for damage or corrosion. Use a scan tool to check the position sensor readings and verify proper operation of the assist step system.
Can I still drive my 2016 GMC Sierra with the B051C code?
Yes, the vehicle is still drivable, but the assist step may not function as intended, which can reduce convenience and accessibility.
How do I reset the B051C code after repairs?
After fixing the issue, use an OBDII scan tool to clear the code. If the problem persists, the code may reappear, indicating further diagnosis is needed.
What tools do I need to repair the B051C code?
You’ll need a multimeter to test electrical connections, an OBDII scanner to read and clear the code, and basic tools to access the assist step components.
How much does it cost to fix the B051C code?
Repair costs can vary depending on the issue. Replacing a faulty sensor may cost $100–$300, while wiring repairs could be less. Labor costs depend on the shop.
Can a dirty or obstructed assist step cause the B051C code?
Yes, dirt, debris, or physical obstructions can prevent the assist step from moving properly, potentially triggering the code. Inspect and clean the step as needed.
Should I replace the assist step position sensor if I get code B051C?
Not necessarily. First, inspect the wiring and connections for damage. Only replace the sensor if testing confirms it is faulty.
Discuss the causes and fixes for B051C 2016 GMC Sierra OBDII Code
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