B1380 GMC 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 GMC 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 GMC 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 GMC?
- 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 GMC?
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1380 GMC 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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Information for Specific GMC Models
- B1380 2014 GMC Sierra — Control Module Ignition Accessory Circuit
- B1380 2015 GMC Sierra — Control Module Ignition Accessory Circuit
- B1380 2016 GMC Sierra — Control Module Ignition Accessory Circuit
- B1380 2017 GMC Sierra — Control Module Ignition Accessory Circuit
- B1380 2018 GMC Sierra — Control Module Ignition Accessory Circuit
Frequently Asked Questions about B1380 GMC Code
1. What does OBDII code B1380 mean on a GMC vehicle?
Code B1380 indicates a problem with the Control Module Ignition Accessory Circuit, which relates to the electrical system managing accessory power.
2. What are common symptoms of B1380 on a GMC?
Symptoms may include malfunctioning accessories like the radio or power windows, intermittent electrical issues, or the vehicle not recognizing key positions.
3. What causes the B1380 code to appear?
Common causes include a faulty ignition switch, damaged wiring or connectors in the accessory circuit, or a problem with the control module.
4. Can I drive my GMC with a B1380 code?
While it may be possible to drive, ignoring the code can lead to further electrical issues or accessory failure. It’s best to address it promptly.
5. How is the B1380 code diagnosed?
A mechanic will use a scan tool to check for related codes, inspect the ignition switch, wiring, and connectors, and test the accessory circuit for proper operation.
6. How do you fix the B1380 code on a GMC?
Repairs may involve replacing the ignition switch, fixing damaged wiring or connectors, or reprogramming or replacing the control module.
7. How much does it cost to fix a B1380 code on a GMC?
Repair costs vary, but it could range from $100 to $500 depending on whether the issue is a simple wiring fix or a control module replacement.
8. Can a dead battery cause the B1380 code?
A dead or weak battery can sometimes trigger electrical-related codes; however, it’s not the most common cause of B1380.
9. Do I need to reprogram the control module after fixing B1380?
In some cases, if the control module is replaced or reset, reprogramming may be necessary to ensure proper function.
10. Can I reset the B1380 code without fixing the issue?
Resetting the code without addressing the cause might clear it temporarily, but the issue will likely return and could lead to further complications.
Discuss the causes and fixes for B1380 GMC OBDII Code
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