B1380 GMC Code - Control Module Ignition Accessory Circuit
Quick Answer
The B1380 GMC code indicates a problem with the control module ignition accessory circuit. Common causes include Faulty ignition switch, Wiring or connection issues in the ignition accessory circuit, Blown fuse related to the control module. 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, Wiring or connection issues in the ignition accessory circuit, Blown fuse related to the control module.
- 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 B1380 GMC Description
The B1380 GMC code indicates a problem with the control module ignition accessory circuit. This circuit is responsible for controlling various functions in the vehicle, such as powering the radio, interior lights, and other accessories when the ignition is turned on. When this circuit malfunctions, it can lead to a range of issues affecting the vehicle's overall performance and electrical systems.
Common Causes of B1380 GMC
- Faulty ignition switch.
- Wiring or connection issues in the ignition accessory circuit.
- Blown fuse related to the control module.
- Defective control module.
- Electrical system malfunctions or shorts.
Symptoms of B1380 GMC
- Failure of interior lights to turn on when the ignition is activated.
- Radio or entertainment system not powering up when the vehicle is started.
- Issues with power windows or other electrical accessories.
- Unresponsive key fob or remote entry system.
- Dashboard warning lights related to the ignition system.
How to Fix B1380 GMC
- Diagnose the specific cause of the issue using a diagnostic scanner and multimeter.
- Inspect the ignition switch, wiring, and connections for any signs of damage or wear.
- Replace any faulty components, such as the ignition switch, control module, or damaged wiring.
- Clear the diagnostic trouble codes and perform a system reset.
- Test the vehicle to ensure that the ignition accessory circuit is functioning correctly.
Cost to Fix B1380 GMC
The cost estimate for repairing a B1380 GMC code can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, repairing the control module ignition accessory circuit can range from $100 to $500, including parts and labor. However, as mentioned earlier, actual costs can differ based on location, vehicle make and model, and labor rates at the auto repair shop. It is recommended to obtain a detailed quote from a trusted mechanic or dealership for a more accurate estimate.
Tech Notes for B1380 GMC
B1380:04 Control Module Ignition Accessory Circuit Short to Ground or Open
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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.
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