AutoCodes – Chevrolet – B1370 2018 Chevrolet Silverado

B1370 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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.

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Code Popularity 386

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Apr 17, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B1370 2018 Chevrolet Silverado Description

The vehicle Power Mode Master (PMM) is the Body Control Module (BCM). The ignition switch is a low-current switch with multiple discrete circuits to the BCM. The BCM logic uses the ignition switch positions to identify the operator's desired power mode and activate specific discrete signals, and serial data messages for the operation of different subsystems as necessary. Other modules which have switched voltage inputs may operate in a default mode if the Power Mode Master serial data message does not match what the individual module can detect from its own connections.
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.

OBDII Code B1370 2018 Chevrolet Silverado - Control Module Ignition ON and Start Circuit - AutoCodes.com — B1370 2018 Chevrolet Silverado Code - Control Module Ignition ON and Start Circuit

What does this mean?

What are the Possible Causes of the DTC B1370 2018 Chevrolet Silverado?

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 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.

What does this mean?

Code Tech Notes

B1370:01 Control Module Ignition ON and Start Circuit Short to Battery
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 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.

Need more information about the B1370 2018 Chevrolet Silverado code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1370 2018 Chevrolet Silverado Code

1. What does OBDII code B1370 for a 2018 Chevrolet Silverado indicate?

The code B1370 for a 2018 Chevrolet Silverado relates to an issue with the Control Module Ignition ON and Start Circuit.

2. What are common symptoms of OBDII code B1370 in a 2018 Chevrolet Silverado?

Common symptoms of code B1370 may include difficulty starting the vehicle, intermittent starting problems, and the engine not turning over.

3. What are the possible causes of OBDII code B1370 in a 2018 Chevrolet Silverado?

Potential causes of code B1370 in a 2018 Chevrolet Silverado include a faulty ignition switch, wiring issues in the ignition circuit, or a malfunctioning control module.

4. How can I diagnose OBDII code B1370 in my 2018 Chevrolet Silverado?

Diagnosing code B1370 involves checking the ignition switch, inspecting the wiring for any damage, and using a diagnostic scanner to identify the specific issue with the control module.

5. Can I still drive my 2018 Chevrolet Silverado with OBDII code B1370?

It is not recommended to drive your vehicle if you are experiencing code B1370 issues, as it may lead to potential starting problems or engine stalling while driving.

6. How can I repair OBDII code B1370 in my 2018 Chevrolet Silverado?

Repairing code B1370 may involve replacing a faulty ignition switch, repairing any damaged wiring, or reprogramming the control module to resolve the issue.

7. Is it possible to reset OBDII code B1370 in a 2018 Chevrolet Silverado without fixing the underlying issue?

Resetting the code without fixing the underlying issue will only temporarily clear the error code, and the problem is likely to reoccur until the root cause is addressed.

8. Will OBDII code B1370 in a 2018 Chevrolet Silverado cause any long-term damage if not repaired promptly?

Ignoring code B1370 in your 2018 Chevrolet Silverado can potentially lead to more severe starting issues, electrical problems, or complete engine failure if left unresolved.

9. Can extreme weather conditions affect the occurrence of OBDII code B1370 in a 2018 Chevrolet Silverado?

Extreme weather conditions, such as extreme heat or cold, can sometimes exacerbate issues related to code B1370 due to the strain they put on the vehicle's electrical components.

10. Is it possible to prevent OBDII code B1370 from occurring in my 2018 Chevrolet Silverado?

Regular maintenance, checking the ignition system for any signs of wear, and addressing any electrical issues promptly can help prevent the occurrence of code B1370 in your 2018 Chevrolet Silverado.