AutoCodes – GMC – B2555 GMC

B2555 GMC Code - Passenger Compartment Lamp Control Circuit Short

Quick Answer

When the Body Control Module (BCM) signals for courtesy lamp operation, a message is sent over the serial data circuit to the driver door and passenger door switches. Common causes include Faulty Passenger Compartment Lamp, Faulty Door and Passenger Door Switch, Door and Passenger Door Switch harness is open or shorted. 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: B2555 GMC indicates Passenger Compartment Lamp Control Circuit Short.
Common causes: Common causes include Faulty Passenger Compartment Lamp, Faulty Door and Passenger Door Switch, Door and Passenger Door Switch harness is open or shorted.
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 4,315

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 Dec 26, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B2555 GMC Description

When the Body Control Module (BCM) signals for courtesy lamp operation, a message is sent over the serial data circuit to the driver door and passenger door switches. The driver door switch and passenger door switch the applies battery voltage to the left and right courtesy lamp control circuits illuminating the door courtesy lamps. The driver door and passenger door switches also provide ground to the lamps. The Diagnostic Trouble Code (DTC) is set when the driver or passenger door switch detects a short to voltage in the courtesy lamp control circuit or the driver or passenger door switch detects a short to ground in the courtesy lamp control circuit.

OBDII Code B2555 GMC - Passenger Compartment Lamp Control Circuit Short - AutoCodes.com — B2555 GMC Code - Passenger Compartment Lamp Control Circuit Short

What does this mean?

What are the Possible Causes of the DTC B2555 GMC?

Faulty Passenger Compartment Lamp
Faulty Door and Passenger Door Switch
Door and Passenger Door Switch harness is open or shorted
Door and Passenger Door Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2555 GMC?

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

B2555 01 Passenger Compartment Lamp Control Circuit Short to Battery
B2555 02 Passenger Compartment Lamp Control Circuit Short to Ground

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2555 GMC 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 B2555 GMC Code

1. What are common symptoms of OBDII code B2555 GMC (Passenger Compartment Lamp Control Circuit Short)?

- Common symptoms include the passenger compartment lamp not working, flickering light, or the lamp staying on constantly.

2. What are possible causes of OBDII code B2555 GMC (Passenger Compartment Lamp Control Circuit Short)?

- Possible causes can include a short circuit in the wiring, a faulty lamp control module, or a problem with the lamp itself.

3. How can I diagnose the issue related to OBDII code B2555 GMC (Passenger Compartment Lamp Control Circuit Short)?

- Use a multimeter to check the continuity of the wiring, inspect the lamp control module for any visible damage, and test the passenger compartment lamp for proper functionality.

4. Can a blown fuse cause OBDII code B2555 GMC (Passenger Compartment Lamp Control Circuit Short)?

- Yes, a blown fuse in the circuit can also trigger this code, so it's important to check and replace any blown fuses as needed.

5. How can I repair OBDII code B2555 GMC (Passenger Compartment Lamp Control Circuit Short) myself?

- You can start by checking and replacing any blown fuses, inspecting the wiring for shorts, testing the lamp control module, and replacing the passenger compartment lamp if necessary.

6. Is it safe to continue driving with OBDII code B2555 GMC (Passenger Compartment Lamp Control Circuit Short) unresolved?

- While it may not affect the drivability of the vehicle, it's important to address this issue promptly as it can cause inconvenience and compromise interior lighting functionality.

7. Can resetting the OBDII system clear the B2555 GMC code (Passenger Compartment Lamp Control Circuit Short)?

- Resetting the OBDII system may temporarily clear the code, but it's crucial to diagnose and fix the underlying issue to prevent the code from reoccurring.

8. How much does it typically cost to repair OBDII code B2555 GMC (Passenger Compartment Lamp Control Circuit Short) at a professional auto repair shop?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300, including parts and labor.

9. Are there any recalls or technical service bulletins related to OBDII code B2555 GMC (Passenger Compartment Lamp Control Circuit Short)?

- It's advisable to check with the manufacturer or a dealership for any recalls or technical service bulletins related to this specific OBDII code to see if there are known issues or remedies.

10. Can extreme temperatures or moisture affect the occurrence of OBDII code B2555 GMC (Passenger Compartment Lamp Control Circuit Short)?

- Yes, extreme temperatures or moisture can potentially exacerbate electrical issues, leading to a higher likelihood of triggering this code, so it's essential to keep the vehicle's interior environment in mind.