B1370 2017 GMC Sierra Code - Control Module Ignition ON and Start 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
- B1370 2017 GMC Sierra indicates Control Module Ignition ON and Start 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 B1370 2017 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 B1370 2017 GMC Sierra?
- Faulty Ignition Switch
- Ignition Switch harness is open or shorted
- Ignition Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
- Faulty Instrument Cluster (If code is stored in Instrument Cluster)
How to Fix the DTC B1370 2017 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
B1370:04 Control Module Ignition ON and Start Circuit Short to Ground or Open
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1370 2017 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 B1370 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code B1370 in a 2017 GMC Sierra?
The common symptoms include issues with starting the vehicle, intermittent starting problems, and possible illumination of the check engine light.
2. What does the OBDII code B1370 for Control Module Ignition ON and Start Circuit indicate in a 2017 GMC Sierra?
This code indicates a fault in the control module's ignition ON and start circuit, which can affect the starting system of the vehicle.
3. What are the possible causes of OBDII code B1370 in a 2017 GMC Sierra?
Possible causes include a faulty ignition switch, damaged wiring or connectors in the ignition circuit, or a malfunctioning control module.
4. How can I diagnose the OBDII code B1370 in a 2017 GMC Sierra?
Diagnosis involves checking the ignition switch, inspecting the wiring and connectors for damage, and testing the control module for proper functionality using a diagnostic scanner.
5. Can I repair OBDII code B1370 in a 2017 GMC Sierra myself?
Depending on your skill level and access to tools, you may be able to repair this code yourself by replacing the faulty ignition switch, repairing damaged wiring, or replacing the control module if needed.
6. Is it safe to continue driving my 2017 GMC Sierra with OBDII code B1370?
It is not recommended to continue driving the vehicle with this code, as it can lead to potential starting issues and further damage to the ignition system.
7. Does fixing OBDII code B1370 require specialized equipment?
While basic tools may be sufficient for some repairs, diagnosing and fixing this code may require a diagnostic scanner and specialized knowledge of automotive electrical systems.
8. How much does it typically cost to repair OBDII code B1370 in a 2017 GMC Sierra?
The cost of repair can vary depending on the exact cause of the code and whether you perform the repairs yourself or take the vehicle to a professional mechanic. Costs may range from a few hundred to a few thousand dollars.
9. Can a dead battery cause OBDII code B1370 to appear in a 2017 GMC Sierra?
A dead or weak battery can potentially trigger this code if it affects the ignition system's power supply. It's recommended to check the battery's condition as part of the diagnostic process.
10. How urgent is it to address OBDII code B1370 in a 2017 GMC Sierra?
It is advisable to address this code as soon as possible to prevent potential starting issues and ensure the proper functioning of the vehicle's ignition system.
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