AutoCodes – Generic – B2638

B2638 Code - Driver D/F1 Door Fail

Quick Answer

The Air Condition (A/C) Automatic Amplifier monitors the Front Mode Door Motor position. Common causes include Faulty Front Mode Door Motor, Front Mode Door Motor harness is open or shorted, Front Mode Door Motor 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: B2638 indicates Driver D/F1 Door Fail.
Common causes: Common causes include Faulty Front Mode Door Motor, Front Mode Door Motor harness is open or shorted, Front Mode Door Motor 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 1,415

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 Jan 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2638 Description

The Air Condition (A/C) Automatic Amplifier monitors the Front Mode Door Motor position. The A/C Automatic Amplifier sets the Diagnostic Trouble Code (DTC) when the malfunctioning door position is detected at FOOT position.

OBDII Code B2638 - Driver D/F1 Door Fail - AutoCodes.com — B2638 Code - Driver D/F1 Door Fail

What does this mean?

What are the Possible Causes of the DTC B2638?

Faulty Front Mode Door Motor
Front Mode Door Motor harness is open or shorted
Front Mode Door Motor circuit poor electrical connection
Front Mode Door Motor control linkage installation condition
Faulty Air Condition (A/C) Automatic Amplifier

How to Fix the DTC B2638?

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 B2638 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 B2638 code?

Need more information on how to fix the B2638 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2638 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2638 Infiniti — Driver D/F1 Door Fail
B2638 Nissan — Driver D/F1 Door Fail

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 B2638 Code

1. What are the common symptoms of OBDII code B2638 (Driver D/F1 Door Fail)?

- Common symptoms include difficulty opening or closing the driver's door, power door lock issues, and interior lights staying on.

2. What can cause OBDII code B2638 to trigger?

- The code B2638 can be triggered by a faulty door latch mechanism, damaged wiring in the door, or a malfunctioning door control module.

3. How can I diagnose the cause of OBDII code B2638?

- To diagnose the cause of B2638, you can visually inspect the door latch and wiring for any damage, test the door lock and unlock functions, and use an OBDII scanner to retrieve the specific error codes.

4. Can I repair OBDII code B2638 myself?

- Depending on the cause of the code, you may be able to repair it yourself by replacing the faulty door latch, repairing damaged wiring, or resetting the door control module. However, if you are unsure, it's recommended to seek professional help.

5. What are some tips for repairing OBDII code B2638?

- Some repair tips include checking for loose connections, ensuring the door is properly aligned, lubricating the door latch mechanism, and performing a reset of the door control module.

6. Is it safe to continue driving with OBDII code B2638 present?

- While the vehicle may still be operable with code B2638 present, it is not recommended to ignore it as it can lead to further door-related issues and safety concerns. It's best to address the problem promptly.

7. How much does it typically cost to repair OBDII code B2638?

- The cost of repairing OBDII code B2638 can vary depending on the specific cause of the issue, the labor rates in your area, and the cost of parts needed for the repair. It's advisable to get a few quotes from different repair shops.

8. Can OBDII code B2638 affect other electrical components in the vehicle?

- Yes, since the driver's door is a critical component for various electrical systems, a malfunction related to code B2638 can potentially affect other systems like power windows, mirrors, and interior lighting.

9. Will resetting the OBDII code B2638 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause of the problem.

10. How can I prevent OBDII code B2638 from recurring in the future?

- To prevent code B2638 from recurring, it's essential to perform regular maintenance on the door components, address any issues promptly, and avoid slamming the doors or putting excessive stress on the door mechanisms.