AutoCodes – Generic – B1372

B1372 Code - Left Rear Door Handle Unlock Circuit No Sub Type Information

Quick Answer

The Remote Function Actuator (RFA) Module interprets radio frequency signals from the Remote Functions Receiver (RFR) Module and Intelligent Access (IA) key transmitters. Common causes include Faulty Left Rear Door Handle, Left Rear Door Handle harness is open or shorted, Left Rear Door Handle 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: B1372 indicates Left Rear Door Handle Unlock Circuit No Sub Type Information.
Common causes: Common causes include Faulty Left Rear Door Handle, Left Rear Door Handle harness is open or shorted, Left Rear Door Handle 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 10,884

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 Feb 18, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1372 Description

The Remote Function Actuator (RFA) Module interprets radio frequency signals from the Remote Functions Receiver (RFR) Module and Intelligent Access (IA) key transmitters. The RFA module receives input signals from various modules and other components. Based on this information, the RFA module generates an output signal to control various components such as the door locks and the liftgate. The OBDII code sets when the RFA module receives no response from the left rear door unlock sensor when voltage and ground are applied to the sensor after detecting vehicle speed.

OBDII Code B1372 - Left Rear Door Handle Unlock Circuit No Sub Type Information - AutoCodes.com — B1372 Code - Left Rear Door Handle Unlock Circuit No Sub Type Information

What does this mean?

What are the Possible Causes of the DTC B1372?

Faulty Left Rear Door Handle
Left Rear Door Handle harness is open or shorted
Left Rear Door Handle circuit poor electrical connection
Faulty Remote Function Actuator (RFA) Module

How to Fix the DTC B1372?

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 B1372 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 B1372 code?

Need more information on how to fix the B1372 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1372 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1372 Buick — Device Ignition On and Start Circuit Low
B1372 Cadillac — Device Ignition On and Start Circuit Low
B1372 Chevrolet — Device Ignition On and Start Circuit Low
B1372 Ford — Left Rear Door Handle Unlock Circuit No Sub Type Information
B1372 GMC — Device Ignition On and Start Circuit Low
B1372 Lincoln — Left Rear Door Handle Unlock Circuit No Sub Type Information
B1372 Mercury — Left Rear Door Handle Unlock Circuit No Sub Type Information
B1372 Pontiac — Device Ignition On and Start Circuit Low
B1372 Saturn — Device Ignition On and Start Circuit Low

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 B1372 Code

1. What are the common symptoms of OBDII code B1372?

- The common symptoms of OBDII code B1372 include difficulties in unlocking the left rear door using the handle, or the door may not unlock at all.

2. What are the possible causes of OBDII code B1372?

- The possible causes of OBDII code B1372 can include a faulty door handle, damaged wiring in the left rear door, or a malfunctioning door lock actuator.

3. How can I diagnose the issue causing OBDII code B1372?

- To diagnose the issue causing OBDII code B1372, you can start by visually inspecting the left rear door handle, checking the wiring for any visible damage, and testing the door lock actuator for proper functionality.

4. Can I repair OBDII code B1372 on my own?

- Depending on your skill level, you may be able to repair OBDII code B1372 on your own by replacing the faulty door handle, repairing damaged wiring, or replacing the door lock actuator.

5. Is it safe to continue driving with OBDII code B1372 present?

- It is not recommended to continue driving with OBDII code B1372 present, as it can lead to potential safety hazards if you are unable to properly unlock the left rear door in case of an emergency.

6. How much does it typically cost to repair OBDII code B1372?

- The cost to repair OBDII code B1372 can vary depending on the specific issue causing the code, but it may range from a few hundred dollars to over a thousand dollars for parts and labor.

7. Can OBDII code B1372 affect other electrical components in the vehicle?

- While OBDII code B1372 specifically relates to the left rear door handle unlock circuit, it is possible for electrical issues to affect other components in the vehicle if left unresolved.

8. Will resetting the OBDII code B1372 fix the issue?

- Resetting the OBDII code B1372 may temporarily clear the code, but it will not fix the underlying issue causing the code to appear. It is important to diagnose and repair the root cause of the problem.

9. Is it necessary to visit a mechanic for OBDII code B1372, or can I fix it myself?

- Depending on your experience level with automotive repairs, you may be able to fix OBDII code B1372 yourself. However, if you are unsure or inexperienced, it is recommended to consult a professional mechanic.

10. Are there any preventative measures I can take to avoid OBDII code B1372 in the future?

- To prevent OBDII code B1372 from occurring in the future, you can perform regular maintenance checks on your vehicle's door handles, wiring, and door lock actuators to catch any potential issues early on.