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B1370 2016 GMC Sierra Code - Control Module Ignition ON and Start Circuit

Quick Answer

The B1370 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Control Module Ignition ON and Start Circuit. Common causes include Faulty ignition switch, Wiring or connection issues in the ignition circuit, Defective 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
B1370 2016 GMC Sierra indicates Control Module Ignition ON and Start Circuit.
Common causes
Common causes include Faulty ignition switch, Wiring or connection issues in the ignition circuit, Defective 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code B1370 2016 GMC Sierra Description

The B1370 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Control Module Ignition ON and Start Circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the ignition and starting systems of the vehicle. The control module plays a crucial role in providing the necessary signals to start the engine and ensure proper ignition timing.

OBDII Code B1370 2016 GMC Sierra - Control Module Ignition ON and Start Circuit
B1370 2016 GMC Sierra Code - Control Module Ignition ON and Start Circuit

Common Causes of B1370 2016 GMC Sierra

  1. Faulty ignition switch
  2. Wiring or connection issues in the ignition circuit
  3. Defective control module
  4. Corrosion or damage to electrical components
  5. Faulty starter motor

Symptoms of B1370 2016 GMC Sierra

  1. Engine cranks but does not start
  2. Intermittent starting issues
  3. Rough idling or stalling
  4. Reduced fuel efficiency
  5. Check engine light illuminated

How to Fix B1370 2016 GMC Sierra

  1. Diagnose the issue using a scan tool to confirm the B1370 code and pinpoint the exact cause of the problem.
  2. Inspect the ignition switch, wiring, and connections for any signs of damage or corrosion.
  3. Test the control module to determine if it is functioning correctly or needs to be replaced.
  4. Check the starter motor for proper operation and replace if necessary.
  5. Clear the code from the vehicle's memory after completing the repair to reset the system and ensure the issue has been resolved.

Cost to Fix B1370 2016 GMC Sierra

The cost of repairing the Control Module Ignition ON and Start Circuit issue can vary depending on the specific cause of the problem and the parts required for the repair. On average, the cost for parts and labor for this repair could range from $200 to $500. However, it's essential to note that labor rates at auto repair shops can vary significantly, so it's recommended to obtain quotes from local shops to get a more accurate estimate. Additionally, the cost of any replacement parts needed will also impact the total repair cost.

What does this mean?

Tech Notes for B1370 2016 GMC Sierra

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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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 2016 GMC Sierra Code

1. What does OBDII code B1370 for a 2016 GMC Sierra indicate?

This code, Control Module Ignition ON and Start Circuit, suggests a problem with the ignition switch circuit for starting the vehicle.

2. What are the common symptoms of OBDII code B1370 in a GMC Sierra?

Common symptoms include difficulty starting the vehicle, intermittent or no crank condition, and potential issues with the vehicle's electrical system.

3. What are the possible causes of OBDII code B1370 in a 2016 GMC Sierra?

The code may be triggered by a faulty ignition switch, wiring issues in the ignition circuit, a defective control module, or a problem with the starter system.

4. How can I diagnose the cause of OBDII code B1370 in my GMC Sierra?

Diagnosing this code may involve checking the ignition switch operation, inspecting the wiring for any damage, testing the control module, and verifying the functionality of the starter system.

5. Can OBDII code B1370 be fixed at home, or do I need professional help?

Depending on your automotive repair skills and access to tools, you may be able to address this code at home by performing basic checks and repairs. However, if you are unsure or encounter complex issues, seeking professional help is recommended.

6. Are there any DIY repair tips for fixing OBDII code B1370 in a 2016 GMC Sierra?

DIY repair tips include ensuring the ignition switch is functioning correctly, checking for loose or damaged wiring connections, and consulting the vehicle's repair manual for specific troubleshooting steps.

7. Will OBDII code B1370 prevent my GMC Sierra from starting?

While the code is related to the ignition ON and start circuit, it may or may not prevent the vehicle from starting. It is essential to address the underlying issue promptly to avoid potential starting problems.

8. How urgent is it to address OBDII code B1370 in a GMC Sierra?

Addressing this code promptly is recommended to prevent potential starting issues and ensure the proper operation of the vehicle's ignition system.

9. Can resetting the OBDII system clear the B1370 code in a 2016 GMC Sierra?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not resolved, the code is likely to reappear. It is crucial to diagnose and fix the root cause of the problem.

10. Is OBDII code B1370 a common issue in 2016 GMC Sierra vehicles?

While the occurrence of this specific code may vary, issues related to the ignition circuit and starting system can be encountered in 2016 GMC Sierra vehicles, making it essential to address them promptly for reliable vehicle operation.

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