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Engine-Codes – Generic – B1305

B1305 Code - Accessory Delay Relay Coil Circuit Short To Ground

Quick Answer

The B1305 diagnostic trouble code (DTC) indicates that there is a short to ground in the accessory delay relay coil circuit. Common causes include Wiring issues, such as a short to ground in the accessory delay relay coil circuit, Faulty accessory delay relay, Corrosion or damage to electrical connectors. 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
B1305 indicates Accessory Delay Relay Coil Circuit Short To Ground.
Common causes
Common causes include Wiring issues, such as a short to ground in the accessory delay relay coil circuit, Faulty accessory delay relay, Corrosion or damage to electrical connectors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code B1305 Description

The B1305 diagnostic trouble code (DTC) indicates that there is a short to ground in the accessory delay relay coil circuit. In simpler terms, this means that there is an issue with the electrical circuit that controls the accessory delay relay, which is responsible for keeping certain accessories powered for a short period after the vehicle is turned off.

OBDII Code B1305 - Accessory Delay Relay Coil Circuit Short To Ground
B1305 Code - Accessory Delay Relay Coil Circuit Short To Ground

Common Causes of B1305

  1. Wiring issues, such as a short to ground in the accessory delay relay coil circuit.
  2. Faulty accessory delay relay.
  3. Corrosion or damage to electrical connectors.
  4. Electrical component failure.
  5. Environmental factors, such as water damage or exposure to extreme temperatures.

Symptoms of B1305

  1. Accessories not working or malfunctioning, such as power windows, radio, or interior lighting.
  2. Accessories turning off immediately when the vehicle is turned off.
  3. Fuse blowing repeatedly.
  4. Battery draining quickly.

How to Fix B1305

  1. Begin by diagnosing the exact location of the short to ground in the accessory delay relay coil circuit using a multimeter or wiring diagram.
  2. Inspect the wiring harness for any visible damage, corrosion, or wear. Repair or replace any damaged wiring.
  3. Test the accessory delay relay for proper functionality. Replace if necessary.
  4. Check and clean any electrical connectors in the circuit.
  5. Clear the DTC from the vehicle's computer memory after completing the repairs.

Cost to Fix B1305

The cost of repairing a B1305 code can vary depending on the specific cause of the issue and the labor rates in your area. In general, the parts needed for this repair, such as a new accessory delay relay or wiring harness, may cost between $50 and $150. Labor costs can range from $100 to $300, depending on the complexity of the repair and the shop's hourly rate. Overall, you can expect to pay between $150 and $450 for addressing a B1305 code. It is advisable to contact local auto repair shops for a more accurate estimate based on your vehicle's make and model.

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Code B1305 Information for Specific Makes

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 B1305 Code

1. What are common symptoms of OBDII code B1305 related to the Accessory Delay Relay Coil Circuit Short To Ground?

- Common symptoms include accessory delay features not functioning properly, such as delayed accessory power after turning off the ignition.

2. What causes the Accessory Delay Relay Coil Circuit Short To Ground code B1305?

- This code is typically triggered by a short circuit between the accessory delay relay coil and ground in the vehicle's electrical system.

3. How can I diagnose the Accessory Delay Relay Coil Circuit Short To Ground issue causing OBDII code B1305?

- Use a multimeter to test for continuity and shorts in the wiring connected to the accessory delay relay coil. Inspect the wiring harness and connectors for damage.

4. Is it safe to continue driving with OBDII code B1305 triggered by the Accessory Delay Relay Circuit issue?

- While the vehicle may still operate, it is not recommended to continue driving with this issue as it can lead to further electrical problems or malfunctions.

5. What are the repair options for fixing OBDII code B1305 related to the Accessory Delay Relay Circuit Short To Ground?

- Repair options include repairing or replacing damaged wiring, repairing the relay circuit, or replacing the accessory delay relay if necessary.

6. Can a DIY enthusiast fix the Accessory Delay Relay Circuit issue causing OBDII code B1305?

- Depending on the individual's skill level and experience with automotive electrical systems, a DIY enthusiast may be able to diagnose and repair this issue with the proper tools and guidance.

7. Are there any precautions to take when working on the Accessory Delay Relay Circuit to resolve OBDII code B1305?

- Before working on the electrical system, disconnect the vehicle's battery to prevent any short circuits or electrical hazards.

8. Will resetting the OBDII system clear the B1305 code related to the Accessory Delay Relay Circuit issue?

- Resetting the OBDII system may temporarily clear the code, but it will likely return if the underlying issue with the accessory delay relay circuit is not addressed.

9. Can extreme weather conditions cause the Accessory Delay Relay Circuit Short To Ground issue triggering OBDII code B1305?

- While extreme weather conditions may not directly cause this specific issue, they can exacerbate existing electrical problems in a vehicle.

10. Is the Accessory Delay Relay Circuit issue causing OBDII code B1305 a common problem in certain vehicle makes and models?

- This issue can occur in various vehicle makes and models that are equipped with an accessory delay system, but its frequency may vary among different vehicles.

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