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B2602 Pontiac Code - DRL Relay Control Circuit Shorted To Ground

Quick Answer

The B2602 Pontiac diagnostic trouble code (DTC) indicates that there is a short to ground in the Daytime Running Lights (DRL) relay control circuit. Common causes include Faulty DRL relay, Wiring short circuit, Corrosion in the relay control circuit. 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
B2602 Pontiac indicates DRL Relay Control Circuit Shorted To Ground.
Common causes
Common causes include Faulty DRL relay, Wiring short circuit, Corrosion in the relay control circuit.
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 11, 2024
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Code B2602 Pontiac Description

The B2602 Pontiac diagnostic trouble code (DTC) indicates that there is a short to ground in the Daytime Running Lights (DRL) relay control circuit. Daytime running lights are a safety feature that automatically turns on the headlights at reduced intensity during the daytime, making the vehicle more visible to other drivers. The DRL relay control circuit is responsible for activating and deactivating the daytime running lights.

OBDII Code B2602 Pontiac - DRL Relay Control Circuit Shorted To Ground
B2602 Pontiac Code - DRL Relay Control Circuit Shorted To Ground

Common Causes of B2602 Pontiac

  1. Faulty DRL relay
  2. Wiring short circuit
  3. Corrosion in the relay control circuit
  4. Electrical overload
  5. Poor electrical connections

Symptoms of B2602 Pontiac

  1. Daytime running lights not working
  2. Headlights staying on constantly
  3. Battery draining quickly
  4. Dashboard warning light illuminated

How to Fix B2602 Pontiac

  1. Begin by inspecting the DRL relay control circuit for any visible damage, such as frayed wires or corrosion.
  2. Test the DRL relay using a multimeter to determine if it is functioning correctly. Replace the relay if it is found to be faulty.
  3. Check the wiring for any shorts or breaks, repairing or replacing damaged wires as needed.
  4. Clean and secure all electrical connections in the DRL relay control circuit to ensure proper contact.
  5. Clear the DTC using an OBD-II scanner after completing the repairs to reset the system and verify that the issue has been resolved.

Cost to Fix B2602 Pontiac

The cost of repairing a DRL relay control circuit shorted to ground can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the parts required for this repair, such as a new DRL relay or wiring harness, can range from $50 to $150. Additionally, labor costs for diagnosing and repairing the issue can add another $100 to $200 to the total repair bill.

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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 B2602 Pontiac Code

1. What are common symptoms of OBDII code B2602 in a Pontiac related to the DRL relay control circuit being shorted to ground?

The common symptoms include non-functional daytime running lights (DRLs), flickering or dim DRLs, or a warning light on the dashboard.

2. What can cause the DRL relay control circuit to be shorted to ground in a Pontiac, triggering code B2602?

Potential causes include damaged wiring, a faulty DRL relay, a short circuit in the DRL circuit, or a malfunctioning DRL module.

3. How can I diagnose the DRL relay control circuit shorted to ground issue in my Pontiac when OBDII code B2602 is present?

Using a multimeter, check for continuity in the DRL circuit, inspect the wiring for any visible damage, and test the DRL relay for proper functionality.

4. Is it safe to drive my Pontiac with OBDII code B2602 indicating a DRL relay control circuit shorted to ground?

It is generally safe to drive, but your DRLs may not function properly, reducing visibility during daytime driving. It's recommended to address the issue promptly.

5. Can I reset the OBDII code B2602 related to the DRL relay control circuit shorted to ground in my Pontiac by disconnecting the battery?

Disconnecting the battery may clear the code temporarily, but the underlying issue causing the short to ground must be resolved to prevent the code from returning.

6. Are there any common repair tips for fixing OBDII code B2602 in a Pontiac due to a DRL relay control circuit shorted to ground?

Start by checking and repairing any damaged wiring, replacing the faulty DRL relay, and ensuring proper connections in the DRL circuit.

7. Can extreme weather conditions contribute to the DRL relay control circuit being shorted to ground in a Pontiac, triggering code B2602?

Extreme heat or moisture can potentially damage the wiring or components in the DRL circuit, leading to a short to ground issue.

8. What are the potential risks of ignoring OBDII code B2602 related to the DRL relay control circuit shorted to ground in a Pontiac?

Ignoring the issue can result in non-functional DRLs, reduced visibility during daytime driving, and potential safety hazards on the road.

9. How much does it typically cost to repair OBDII code B2602 caused by a DRL relay control circuit shorted to ground in a Pontiac?

The cost can vary depending on the extent of the damage, but it may involve replacing components like the DRL relay, fixing wiring, or addressing other related issues.

10. Is it possible to prevent OBDII code B2602 from occurring again in my Pontiac after fixing the DRL relay control circuit shorted to ground issue?

Regularly inspecting the DRL circuit for any signs of damage, ensuring proper maintenance, and addressing any electrical issues promptly can help prevent the code from reoccurring.

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