B1380 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado?
- 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 2018 Chevrolet Silverado?
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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Code
1. What does the OBDII code B1380 mean on a 2018 Chevrolet Silverado?
The B1380 code indicates an issue with the Control Module Ignition Accessory Circuit, which may involve a malfunction in the accessory power supply to various systems.
2. What are the common symptoms of the B1380 code in a Chevrolet Silverado?
Symptoms may include non-functional accessories like the radio, power windows, or interior lights, as well as intermittent power loss to these systems.
3. What causes the B1380 code to appear?
The most common causes are faulty wiring, a malfunctioning ignition switch, a damaged accessory relay, or a failing control module.
4. How can I diagnose the B1380 code on my 2018 Silverado?
Start by inspecting the wiring and connectors in the ignition accessory circuit, check the accessory relay, and test the ignition switch for proper operation.
5. Can a blown fuse trigger the B1380 code?
Yes, a blown fuse in the accessory power circuit can cause this code to appear, as it disrupts the power supply to the control module.
6. Is the B1380 code serious?
It may not immediately affect drivability, but it can cause issues with essential accessories and should be addressed to avoid further electrical problems.
7. Can I drive my Silverado with the B1380 code active?
While the vehicle may still be drivable, you could experience loss of accessory functionality, so it’s best to resolve the issue promptly.
8. What repairs are commonly needed to fix the B1380 code?
Repairs may include replacing damaged wiring, repairing or replacing the ignition switch, replacing the accessory relay, or reprogramming/replacing the control module.
9. How much does it cost to fix the B1380 code on a Chevrolet Silverado?
The cost varies depending on the repair, but diagnosing and fixing wiring or relays typically costs $100–$300, while a control module replacement can cost $500 or more.
10. Can I reset the B1380 code without fixing it?
You can clear the code temporarily using an OBDII scanner, but it will likely return if the underlying issue isn’t resolved.
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