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AutoCodes – Generic – B2600:02

B2600:02 Code - Left Daytime Running Lamps Control Circuit Short to Ground

Quick Answer

The ambient light sensor is used to monitor outside lighting conditions. Common causes include Faulty Left Headlamp Assembly, Left Headlamp Assembly harness is open or shorted, Left Headlamp Assembly 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
B2600:02 indicates Left Daytime Running Lamps Control Circuit Short to Ground.
Common causes
Common causes include Faulty Left Headlamp Assembly, Left Headlamp Assembly harness is open or shorted, Left Headlamp Assembly 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 228
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on May 26, 2023
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Code B2600:02 Description

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 volts depending on outside lighting conditions. The Body Control Module (BCM) provides a 5-volt reference signal to the ambient light sensor and the Heating, Ventilation, and Air Conditioning (HVAC) control module provides a low reference ground. The BCM monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either Daytime Running Lights (DRL) or Automatic Lamp Control (ALC) when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the DRLs ON. During low light conditions, the BCM will command the low beam headlamps ON. Any function or condition that turns on the headlamps will cancel the DRL operation. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a short to ground in the left DRL control circuit.
OBDII Code B2600:02 - Left Daytime Running Lamps Control Circuit Short to Ground - AutoCodes.com
B2600:02 Code - Left Daytime Running Lamps Control Circuit Short to Ground
What does this mean?

What are the Possible Causes of the DTC B2600:02?

  • Faulty Left Headlamp Assembly
  • Left Headlamp Assembly harness is open or shorted
  • Left Headlamp Assembly circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC B2600:02?

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 does this mean?

Code Tech Notes

B2600:01 Left Daytime Running Lamps Control Circuit short to Battery
B2600:02 Left Daytime Running Lamps Control Circuit Short to Ground
B2600:04 Left Daytime Running Lamps Control Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2600:02 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.

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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 B2600:02 Code

What does the OBDII code B2600:02 mean?

The code B2600:02 indicates a short to ground in the left daytime running lamp (DRL) control circuit.

What are the common symptoms of a B2600:02 code?

Symptoms may include the left daytime running lamp not working, a warning light on the dashboard, or both.

What causes the B2600:02 code to appear?

Common causes include damaged wiring, a shorted daytime running lamp bulb, a faulty DRL control module, or corroded electrical connectors.

How do I diagnose the B2600:02 code?

Start by inspecting the lamp, wiring, and connectors for visible damage or corrosion. Use a multimeter to check for continuity and locate the short to ground.

Can I drive with the B2600:02 code active?

Yes, but it is not recommended as it may affect vehicle visibility and safety, especially during the day.

How do I fix the B2600:02 code?

Repairs may involve replacing the left DRL bulb, repairing or replacing damaged wiring, or replacing the DRL control module if faulty.

Is the B2600:02 code a serious issue?

While it may not prevent the vehicle from running, it compromises safety since other drivers may not see the vehicle as easily.

How much does it cost to repair the B2600:02 code?

Costs vary depending on the issue but typically range from $50 to $200 for parts and labor, depending on whether it’s a bulb, wiring, or module issue.

Can a blown fuse cause the B2600:02 code?

While a blown fuse might indicate an issue, the code specifically refers to a short to ground in the circuit rather than a blown fuse.

Do I need special tools to fix the B2600:02 code?

Basic tools like a multimeter and wire repair tools are often sufficient, but advanced diagnostic equipment may be needed for complex cases.

Discuss the causes and fixes for B2600:02 OBDII Code

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