AutoCodes – Generic – B305D

B305D Code - Challenge Active Circuit

Quick Answer

The Body Control Module (BCM) communicates with the remote control door lock receiver through the keyless entry challenge active circuit. Common causes include Faulty Retained Accessory Power Relay, Retained Accessory Power Relay harness is open or shorted, Retained Accessory Power 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: B305D indicates Challenge Active Circuit.
Common causes: Common causes include Faulty Retained Accessory Power Relay, Retained Accessory Power Relay harness is open or shorted, Retained Accessory Power 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 3,162

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 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B305D Description

The Body Control Module (BCM) communicates with the remote control door lock receiver through the keyless entry challenge active circuit. The challenge active signal is activated by the Keyless Entry Control Module and sent to the BCM when active communication between the vehicle and the keyless entry transmitter is initiated.

OBDII Code B305D - Challenge Active Circuit - AutoCodes.com — B305D Code - Challenge Active Circuit

What does this mean?

What are the Possible Causes of the DTC B305D?

Faulty Retained Accessory Power Relay
Retained Accessory Power Relay harness is open or shorted
Retained Accessory Power Relay circuit poor electrical connection
Faulty Keyless Entry Control Module

How to Fix the DTC B305D?

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 B305D 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 B305D code?

Need more information on how to fix the B305D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B305D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B305D Buick — Challenge Active Circuit
B305D Cadillac — Challenge Active Circuit
B305D Chevrolet — Challenge Active Circuit
B305D GMC — Challenge Active Circuit

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 B305D Code

1. What are common symptoms of OBDII code B305D (Challenge Active Circuit)?

Symptoms may include an illuminated check engine light, erratic engine performance, and issues with vehicle starting.

2. What does the OBDII code B305D indicate?

Code B305D typically indicates a problem with the Challenge Active Circuit in the vehicle's system.

3. What are possible causes of OBDII code B305D?

Possible causes include damaged wiring or connectors, a faulty challenge active circuit module, or issues with the vehicle's computer system.

4. How can I diagnose the OBDII code B305D?

Diagnosis typically involves using a diagnostic scanner to retrieve the code, inspecting wiring and connectors for damage, and testing the challenge active circuit module for proper function.

5. Can I still drive my vehicle with OBDII code B305D?

It is not recommended to drive your vehicle with an active OBDII code, as it may lead to further damage and potential safety hazards.

6. How can I repair OBDII code B305D?

Repair options may include repairing or replacing damaged wiring or connectors, replacing the challenge active circuit module, or reprogramming the vehicle's computer system.

7. Is OBDII code B305D a serious issue?

While the severity of the issue can vary, it is important to address OBDII codes promptly to prevent potential damage to your vehicle and ensure optimal performance.

8. Can I clear OBDII code B305D without fixing the underlying issue?

Clearing the code without addressing the underlying problem may temporarily turn off the check engine light, but the issue is likely to reoccur until properly repaired.

9. How much does it cost to fix OBDII code B305D?

The cost of fixing OBDII code B305D can vary depending on the specific cause of the issue, the required repairs, and labor costs at your chosen repair facility.

10. Is it possible to prevent OBDII code B305D from occurring?

Regular vehicle maintenance, including checking and replacing wiring and connectors as needed, can help reduce the likelihood of OBDII code B305D occurring.