AutoCodes – Chevrolet – B3970 Chevrolet

B3970 Chevrolet Code - Output Driver Module Performance

Quick Answer

The Body Control Module (BCM) internally grounds the driver door unlock relay control circuit for the driver door unlock relay when it receives an unlock switch signal from either door lock switch. Common causes include Faulty Driver Door Unlock Relay, Driver Door Unlock Relay harness is open or shorted, Driver Door Unlock Relay 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: B3970 Chevrolet indicates Output Driver Module Performance.
Common causes: Common causes include Faulty Driver Door Unlock Relay, Driver Door Unlock Relay harness is open or shorted, Driver Door Unlock Relay 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 573

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3970 Chevrolet Description

The Body Control Module (BCM) internally grounds the driver door unlock relay control circuit for the driver door unlock relay when it receives an unlock switch signal from either door lock switch. When the BCM grounds the driver door unlock relay control circuit the driver door unlock relay is energized and unlocks the driver door. The Diagnostic Trouble Code (DTC) will set if the driver door unlock relay control circuit is shorted to ground or open for more then one second.

OBDII Code B3970 Chevrolet - Output Driver Module Performance - AutoCodes.com — B3970 Chevrolet Code - Output Driver Module Performance

What does this mean?

What are the Possible Causes of the DTC B3970 Chevrolet?

Faulty Driver Door Unlock Relay
Driver Door Unlock Relay harness is open or shorted
Driver Door Unlock Relay circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3970 Chevrolet?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3970 Chevrolet 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 B3970 Chevrolet code?

Need more information on how to fix the B3970 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3970 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 B3970 Chevrolet Code

1. What are the common symptoms of OBDII code B3970 Output Driver Module Performance in a Chevrolet?

- Common symptoms include issues with the vehicle's lighting system, such as erratic behavior or complete failure of lights.

2. What are the potential causes of the B3970 code in a Chevrolet?

- The B3970 code is often triggered by a malfunction in the output driver module, a faulty wiring connection, or a problem with the lighting control module.

3. How can I diagnose the B3970 code in my Chevrolet?

- To diagnose the B3970 code, you can use an OBDII scanner to read the code and check the vehicle's lighting system for any issues or malfunctions.

4. Can I continue driving my Chevrolet with the B3970 code present?

- It is not recommended to continue driving your Chevrolet with the B3970 code present, as it can lead to potential safety hazards due to lighting system malfunctions.

5. How can I repair the B3970 code in my Chevrolet?

- Repairing the B3970 code typically involves replacing the faulty output driver module, repairing any wiring issues, or addressing problems with the lighting control module.

6. Are there any DIY tips for fixing the B3970 code in a Chevrolet?

- If you have experience with automotive repairs, you may be able to replace the output driver module yourself. However, it is recommended to consult a professional mechanic for proper diagnosis and repair.

7. How much does it cost to repair the B3970 code in a Chevrolet?

- The cost of repairing the B3970 code can vary depending on the extent of the issue and the specific repairs needed. It is advisable to obtain quotes from different mechanics for an accurate estimate.

8. Will resetting the OBDII code clear the B3970 code in my Chevrolet?

- Resetting the OBDII code may temporarily clear the B3970 code, but if the underlying issue is not addressed, the code is likely to reappear.

9. Can extreme weather conditions trigger the B3970 code in a Chevrolet?

- Extreme weather conditions can potentially affect the output driver module's performance, leading to the triggering of the B3970 code in a Chevrolet.

10. Is the B3970 code specific to certain Chevrolet models?

- The B3970 code related to Output Driver Module Performance is typically found in various Chevrolet models equipped with an OBDII system and a lighting control module.