B1380 2016 GMC Sierra Code - Control Module Ignition Accessory Circuit
Quick Answer
The vehicle Power Mode Master (PMM) is the Body Control Module (BCM). Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch circuit poor electrical connection. 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
- B1380 2016 GMC Sierra indicates Control Module Ignition Accessory Circuit.
- Common causes
- Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch circuit poor electrical connection.
- 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.
Code B1380 2016 GMC Sierra Description
The Power Mode Master will activate relays and other direct outputs of the Power Mode Master as needed according to the calculated power mode. Some relays controlled by the BCM are switched ignition voltage outputs that are pass-through circuits within the BCM directly from the ignition switch. If these circuits are short to ground, the B+ circuit fuse to the ignition switch will open.
What are the Possible Causes of the DTC B1380 2016 GMC Sierra?
- Faulty Ignition Switch
- Ignition Switch harness is open or shorted
- Ignition Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B1380 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
B1380:04 Control Module Ignition Accessory Circuit Short to Ground or Open
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1380 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 B1380 2016 GMC Sierra Code
1. What does the OBDII code B1380 mean on a 2016 GMC Sierra?
The B1380 code indicates an issue with the Control Module Ignition Accessory Circuit, which is responsible for controlling accessory power in the vehicle.
2. What are the common symptoms of the B1380 code?
Symptoms may include inoperative accessories (radio, windows, or power outlets), electrical malfunctions, or the vehicle failing to enter accessory mode.
3. What causes the B1380 code to appear?
Common causes include a faulty ignition switch, wiring issues (such as short circuits or open circuits), or a malfunctioning control module.
4. How can I diagnose the B1380 code on my 2016 GMC Sierra?
Start by inspecting the ignition switch, accessory circuit wiring, and related fuses for damage or corrosion. Use a scan tool to monitor circuit voltages.
5. Can a blown fuse trigger the B1380 code?
Yes, a blown fuse in the accessory circuit can cause the code to appear by disrupting the circuit's functionality.
6. How do I fix the B1380 code?
Repairs may include replacing a faulty ignition switch, repairing damaged wiring, replacing a blown fuse, or reprogramming or replacing the control module.
7. Can I drive my 2016 GMC Sierra with the B1380 code?
It’s not recommended, as the code may indicate electrical issues that could affect accessory functions or lead to further damage.
8. How much does it cost to repair the B1380 code?
Costs vary depending on the root cause but typically range from $100 for simple wiring repairs to $500 or more for ignition switch or control module replacement.
9. Can a weak battery cause the B1380 code?
Yes, a weak or failing battery can cause voltage irregularities that may trigger this code.
10. Will clearing the B1380 code fix the problem?
Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return.
Discuss the causes and fixes for B1380 2016 GMC Sierra OBDII Code
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