AutoCodes – Cadillac – B2555 Cadillac

B2555 Cadillac 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 Cadillac 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 2,373

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

What does this mean?

What are the Possible Causes of the DTC B2555 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What does the OBDII code B2555 mean on a Cadillac?

The code B2555 indicates a problem with the Passenger Compartment Lamp Control Circuit, specifically a short to ground or short to power.

2. What are common symptoms of the B2555 code?

Common symptoms include interior dome lights not working, flickering lights, or lights staying on when they should turn off.

3. What causes the B2555 code on a Cadillac?

Causes can include damaged wiring, a faulty lamp control module, a shorted bulb, or a malfunctioning switch.

4. Can I drive my Cadillac with the B2555 code?

Yes, you can drive the vehicle, but the interior lighting may not function properly, which could be inconvenient or a safety concern at night.

5. How do I diagnose the B2555 code on my Cadillac?

Start by inspecting the wiring and connectors for damage or corrosion. Check the lamp control module, switches, and bulbs for signs of malfunction or shorts.

6. How do I fix the B2555 code on a Cadillac?

Repairs may involve replacing damaged wiring, fixing shorts in the circuit, replacing a faulty lamp control module, or changing defective bulbs.

7. Can a blown fuse cause the B2555 code?

A blown fuse can be a symptom rather than a cause, as it may indicate a short in the circuit that needs to be addressed.

8. How much does it cost to fix the B2555 code?

Repair costs vary depending on the root cause but can range from $50 for simple bulb or wiring repairs to $300 or more for module replacement.

9. Can I clear the B2555 code without fixing it?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue isnâ€™t resolved.

10. What tools are needed to repair the B2555 code?

Basic tools include a multimeter for checking continuity, an OBDII scanner for reading and clearing codes, and potentially wire repair tools if rewiring is necessary.