AutoCodes – Pontiac – B2600 Pontiac

B2600 Pontiac Code - Left Daytime Running Lamps Control Circuit

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 Pontiac indicates Left Daytime Running Lamps Control Circuit.
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 1,603

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 May 26, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B2600 Pontiac 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 problem in the left DRL control circuit.

OBDII Code B2600 Pontiac - Left Daytime Running Lamps Control Circuit - AutoCodes.com — B2600 Pontiac Code - Left Daytime Running Lamps Control Circuit

What does this mean?

What are the Possible Causes of the DTC B2600 Pontiac?

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 Pontiac?

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 Pontiac 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 Pontiac Code

1. What are the common symptoms of OBDII code B2600 in a Pontiac related to the Left Daytime Running Lamps Control Circuit?

- Common symptoms include the left daytime running lamp not functioning, flickering, or staying on constantly even when the vehicle is turned off.

2. What are some possible causes of OBDII code B2600 in a Pontiac?

- Possible causes may include a faulty daytime running lamp control module, damaged wiring or connectors, or a problem with the left daytime running lamp bulb itself.

3. How can I diagnose the cause of OBDII code B2600 in my Pontiac?

- Start by visually inspecting the wiring and connectors for any visible damage. Use a multimeter to test the continuity of the circuits and check for proper voltage at the daytime running lamp control module.

4. Is it safe to continue driving my Pontiac with OBDII code B2600 triggered?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure proper visibility and safety on the road, especially during daytime hours.

5. Can I repair OBDII code B2600 in my Pontiac by simply replacing the left daytime running lamp bulb?

- While a faulty bulb can sometimes trigger this code, it is advisable to perform a thorough diagnosis to rule out other potential causes before replacing any components.

6. Will resetting the OBDII code B2600 in my Pontiac make the issue go away permanently?

- Resetting the code may temporarily turn off the warning light, but if the underlying issue causing the fault is not addressed, the code is likely to reappear.

7. How much does it typically cost to repair OBDII code B2600 in a Pontiac at a professional auto repair shop?

- Repair costs can vary depending on the exact cause of the issue, but you can expect to pay anywhere from $100 to $300 for parts and labor to fix the Left Daytime Running Lamps Control Circuit problem.

8. Can a DIY enthusiast with basic automotive skills address OBDII code B2600 in a Pontiac?

- Yes, with the right tools and knowledge, a DIY enthusiast can diagnose and repair this issue. However, if you are unsure or uncomfortable working on electrical systems, it's best to seek professional help.

9. Are there any preventive measures I can take to avoid triggering OBDII code B2600 in my Pontiac?

- Regularly inspecting the condition of your vehicle's lighting system, including the daytime running lamps, and addressing any issues promptly can help prevent this code from being triggered.

10. How long does it typically take to repair OBDII code B2600 in a Pontiac?

- The repair time can vary depending on the cause of the issue and the expertise of the person performing the repair. In general, it may take anywhere from 30 minutes to a few hours to diagnose and fix the problem.