AutoCodes – Generic – B1331

B1331 Code - Decklid Ajar Rear Door Circuit Failure

Quick Answer

The Body Control Module (BCM) monitors the Decklid Ajar Rear Door Switch. Common causes include Faulty Decklid Ajar Rear Door Switch, Decklid Ajar Rear Door Switch harness is open or shorted, Decklid Ajar Rear Door Switch circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1331 indicates Decklid Ajar Rear Door Circuit Failure.
Common causes: Common causes include Faulty Decklid Ajar Rear Door Switch, Decklid Ajar Rear Door Switch harness is open or shorted, Decklid Ajar Rear Door Switch circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 11,994

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 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 B1331 Description

The Body Control Module (BCM) monitors the Decklid Ajar Rear Door Switch. The BCM sets the OBDII code when the Decklid Ajar Rear Door Switch is not to factory specifications.

OBDII Code B1331 - Decklid Ajar Rear Door Circuit Failure - AutoCodes.com — B1331 Code - Decklid Ajar Rear Door Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1331?

Faulty Decklid Ajar Rear Door Switch
Decklid Ajar Rear Door Switch harness is open or shorted
Decklid Ajar Rear Door Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1331?

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 B1331 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 B1331 code?

Need more information on how to fix the B1331 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1331 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1331 Buick — Upper Right Air Temperature Sensor
B1331 Cadillac — Upper Right Air Temperature Sensor
B1331 Chevrolet — Upper Right Air Temperature Sensor
B1331 GMC — Upper Right Air Temperature Sensor
B1331 Hyundai — Passenger-Side Front Impact Sensor Short To Ground
B1331 KIA — Passenger-Side Front Impact Sensor Short To Ground
B1331 Pontiac — Upper Right Air Temperature Sensor
B1331 Saturn — Upper Right Air Temperature Sensor

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 B1331 Code

1. What are the common symptoms of OBDII code B1331 (Decklid Ajar Rear Door Circuit Failure)?

- The common symptoms include the trunk not closing properly, warning lights on the dashboard, and issues with the rear door latch.

2. What are the possible causes of the B1331 code?

- The code can be triggered by a faulty trunk or rear door latch sensor, damaged wiring in the circuit, or a malfunctioning control module.

3. How can I diagnose the B1331 code?

- To diagnose the issue, you can visually inspect the wiring and sensors, use an OBDII scanner to read the code, and perform a detailed inspection of the trunk and rear door latch components.

4. Can I still drive my vehicle with the B1331 code present?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent any potential safety hazards or further damage.

5. How do I repair the Decklid Ajar Rear Door Circuit Failure issue?

- The repair process may involve replacing the faulty trunk or rear door latch sensor, repairing damaged wiring, or reprogramming the control module. It is advisable to consult a professional mechanic for an accurate diagnosis and repair.

6. Is it possible to reset the B1331 code without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reappearing and ensure the proper functioning of the trunk and rear door.

7. Are there any DIY tips for troubleshooting the B1331 code?

- You can start by checking the wiring connections, ensuring the trunk and rear door are properly closed, and inspecting the sensors for any visible damage before seeking professional help.

8. How much does it cost to repair the B1331 code?

- The cost of repair can vary depending on the extent of the issue, the parts needed, and the labor charges. It is recommended to obtain quotes from different repair shops to compare prices.

9. Can extreme weather conditions affect the triggering of the B1331 code?

- Yes, extreme temperatures or humidity levels can sometimes affect the sensors and wiring involved in the Decklid Ajar Rear Door Circuit, leading to the triggering of the B1331 code.

10. Will the B1331 code cause my vehicle to fail an emissions test?

- The B1331 code is not directly related to emissions, so it should not cause your vehicle to fail an emissions test. However, it is still important to address the issue to ensure the overall functionality of your vehicle.