AutoCodes – Generic – B1309

B1309 Code - Power Door Lock Circuit Short To Ground

Quick Answer

The Body Control Module (BCM) monitors the Power Door Lock. Common causes include Faulty Power Door Lock, Power Door Lock harness is open or shorted, Power Door Lock 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: B1309 indicates Power Door Lock Circuit Short To Ground.
Common causes: Common causes include Faulty Power Door Lock, Power Door Lock harness is open or shorted, Power Door Lock 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 25,494

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 Nov 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1309 Description

The Body Control Module (BCM) monitors the Power Door Lock. The BCM sets the OBDII code when the Power Door Lock is not to factory specifications.

OBDII Code B1309 - Power Door Lock Circuit Short To Ground - AutoCodes.com — B1309 Code - Power Door Lock Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1309?

Faulty Power Door Lock
Power Door Lock harness is open or shorted
Power Door Lock circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1309?

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 B1309 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 B1309 code?

Need more information on how to fix the B1309 code? Get Access to Factory Service Manuals

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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 B1309 Code

1. What are the common symptoms of OBDII code B1309 (Power Door Lock Circuit Short To Ground)?

The common symptoms include malfunctioning power door locks, doors not locking or unlocking properly, and possibly a blown fuse.

2. What can cause OBDII code B1309 to occur?

This code is typically triggered by a short to ground in the power door lock circuit, which may be caused by damaged wiring, a faulty door lock actuator, or a faulty control module.

3. How can I diagnose the issue related to OBDII code B1309?

You can start by visually inspecting the wiring harness for any signs of damage or wear. Using a multimeter to check for continuity and shorts in the circuit can help pinpoint the exact location of the issue.

4. Is it safe to continue driving with OBDII code B1309 present?

While your vehicle may still be drivable with this code, it's important to address the issue promptly to avoid potential issues with the power door locks and electrical system.

5. Can I repair OBDII code B1309 myself, or do I need professional help?

Depending on your level of automotive expertise, you may be able to repair this issue yourself by identifying and fixing the short to ground in the power door lock circuit. However, if you are unsure, it's best to seek help from a professional mechanic.

6. What are some repair tips for fixing OBDII code B1309?

Repair tips include checking and repairing damaged wiring, replacing a faulty door lock actuator, or resetting the control module after fixing the issue in the circuit.

7. Will resetting the OBDII code B1309 clear the issue permanently?

Resetting the code may clear it temporarily, but if the underlying issue causing the short to ground in the power door lock circuit is not fixed, the code is likely to reappear.

8. How much does it typically cost to repair OBDII code B1309?

The cost of repairing this code can vary depending on the cause of the issue, the extent of the damage, and whether you choose to repair it yourself or seek professional help. It's advisable to get a diagnostic from a mechanic to determine the exact cost.

9. Are there any preventive measures to avoid OBDII code B1309 in the future?

Keeping an eye on the condition of your power door lock system, addressing any issues promptly, and conducting regular inspections of the wiring harness can help prevent this code from occurring again.

10. Can OBDII code B1309 affect other electrical systems in the vehicle?

While the primary impact of this code is on the power door lock circuit, a short to ground in the electrical system can potentially affect other related systems, so it's important to address the issue promptly.