B051E 2016 GMC Sierra Code - Assist Step Disable Switch Circuit
Quick Answer
The B051E diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to the Assist Step Disable Switch Circuit. Common causes include Faulty assist step disable switch, Wiring issues or damaged wiring harness, Corrosion or poor connections in the circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B051E 2016 GMC Sierra indicates Assist Step Disable Switch Circuit.
- Common causes
- Common causes include Faulty assist step disable switch, Wiring issues or damaged wiring harness, Corrosion or poor connections in the circuit.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code B051E 2016 GMC Sierra Description
The B051E diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to the Assist Step Disable Switch Circuit. This code indicates that there is a malfunction in the circuit that controls the assist step disable switch. The assist step disable switch is a component that allows the driver to manually disable the power retractable running boards on the vehicle. When this circuit is not functioning properly, it can lead to issues with the operation of the running boards.
Common Causes of B051E 2016 GMC Sierra
- Faulty assist step disable switch.
- Wiring issues or damaged wiring harness.
- Corrosion or poor connections in the circuit.
- Electronic control module (ECM) malfunction.
- Physical damage to the running board mechanism affecting the switch circuit.
Symptoms of B051E 2016 GMC Sierra
- Running boards fail to extend or retract properly.
- Inability to disable the running boards manually.
- Warning light on the dashboard related to the running boards.
- Unusual noises coming from the running board mechanism.
- Running boards getting stuck in the extended or retracted position.
How to Fix B051E 2016 GMC Sierra
- Begin by conducting a thorough inspection of the assist step disable switch and the wiring harness for any visible damage or corrosion.
- Test the switch using a multimeter to determine if it is functioning correctly.
- Check the connections in the circuit and repair any loose or damaged wires.
- If the switch and wiring are in good condition, the issue may lie with the ECM, which may need to be reprogrammed or replaced.
- Finally, test the running board system to ensure that the issue has been resolved and that the running boards are functioning as intended.
Cost to Fix B051E 2016 GMC Sierra
The cost of repairing the Assist Step Disable Switch Circuit can vary depending on the specific cause of the issue. On average, the parts for this repair may range from $50 to $200, while the labor costs can range from $100 to $300. It's important to note that these are rough estimates, and actual costs may differ based on the location of the repair shop, the make and model of the vehicle, and any additional repairs or services that may be needed. It's recommended to consult with a professional mechanic for a more accurate cost estimate.
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Frequently Asked Questions about B051E 2016 GMC Sierra Code
1. What does the OBDII code B051E mean on a 2016 GMC Sierra?
The code B051E indicates an issue with the Assist Step Disable Switch Circuit, which controls the power running boards or assist steps.
2. What are the common symptoms of the B051E code?
Symptoms include assist steps not deploying or retracting, no response from the disable switch, or a related warning message on the dashboard.
3. What causes the B051E code to appear?
Common causes include a faulty assist step disable switch, damaged wiring or connectors in the circuit, or a malfunctioning control module.
4. How can I diagnose the B051E code?
Start by checking the assist step disable switch for proper operation, inspect the wiring and connectors for damage or corrosion, and use a scan tool to verify the fault.
5. Can I continue driving with the B051E code active?
Yes, but the assist steps may not function properly, which can be inconvenient and potentially hazardous when entering or exiting the vehicle.
6. How do I fix the B051E code on a 2016 GMC Sierra?
Repairs may involve replacing the assist step disable switch, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the control module.
7. How much does it cost to fix the B051E code?
Repair costs can vary, but replacing the switch or repairing wiring typically ranges from $100 to $300, while control module replacement may cost more.
8. Can a blown fuse cause the B051E code?
Yes, a blown fuse in the assist step circuit can trigger the code, so checking the fuses is a good first step.
9. Is the B051E code specific to the 2016 GMC Sierra?
While it commonly appears in GMC Sierra models, the code may also apply to other GM vehicles with similar assist step systems.
10. Do I need professional help to fix the B051E code?
If you're comfortable with basic electrical diagnostics and repairs, you can attempt the fix yourself. Otherwise, it’s best to consult a professional mechanic.
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