AutoCodes – Chevrolet – B2545 Chevrolet

B2545 Chevrolet Code - Backup Lamps Circuit

Quick Answer

The backup lamp relay is always supplied with battery voltage. Common causes include Blown Backup Lamp Fuse, Faulty Body Control Module (BCM), Body Control Module 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: B2545 Chevrolet indicates Backup Lamps Circuit.
Common causes: Common causes include Blown Backup Lamp Fuse, Faulty Body Control Module (BCM), Body Control Module 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 9,592

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 24, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B2545 Chevrolet Description

The backup lamp relay is always supplied with battery voltage. With the engine running and the transmission in the reverse position, the Transmission Control Module (TCM) sends a serial data message to the Body Control Module (BCM). The message indicates that the gear selector is in the reverse position. The BCM energizes the backup lamp relay by applying battery voltage to the backup lamp relay control circuit. When the backup lamp relay is energized, the relay switch contacts close, and battery voltage is applied through the backup lamp fuses to the backup lamp control circuits which illuminate the backup lamps. Once the driver moves the gear selector out of the reverse position, a message is sent by the TCM via serial data requesting the BCM to remove the battery voltage from the backup lamp relay control circuit. The engine must be running for the backup lamps to operate. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a problem with the backup lamps relay control circuit.

OBDII Code B2545 Chevrolet - Backup Lamps Circuit - AutoCodes.com — B2545 Chevrolet Code - Backup Lamps Circuit

What does this mean?

What are the Possible Causes of the DTC B2545 Chevrolet?

Blown Backup Lamp Fuse
Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection

How to Fix the DTC B2545 Chevrolet?

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

B2545:01 Backup Lamps Circuit Short to Battery
B2545:02 Backup Lamps Circuit Short to Ground
B2545:02 Backup Lamps Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2545 Chevrolet 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.

Need more information about the B2545 Chevrolet code?

Need more information on how to fix the B2545 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Chevrolet Models

B2545 2014 Chevrolet Silverado — Backup Lamps Circuit
B2545 2015 Chevrolet Silverado — Backup Lamps Circuit
B2545 2016 Chevrolet Silverado — Backup Lamps Circuit
B2545 2017 Chevrolet Silverado — Backup Lamps Circuit
B2545 2018 Chevrolet Silverado — Backup Lamps Circuit

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 B2545 Chevrolet Code

1. What are the common symptoms of OBDII code B2545 in a Chevrolet related to the Backup Lamps Circuit?

- Common symptoms include non-functioning backup lights, a dashboard warning light, and issues with shifting out of park.

2. What are the typical causes of OBDII code B2545 in a Chevrolet related to the Backup Lamps Circuit?

- The code is often triggered by a faulty backup lamp switch, damaged wiring, a blown fuse, or a malfunctioning control module.

3. How can I diagnose the OBDII code B2545 in a Chevrolet affecting the Backup Lamps Circuit?

- Diagnosis involves checking the backup light bulbs, inspecting the wiring for damage, testing the backup lamp switch, and scanning the vehicle's computer for trouble codes.

4. What are some DIY repair tips for fixing OBDII code B2545 in a Chevrolet related to the Backup Lamps Circuit?

- DIY repair tips include checking and replacing blown fuses, inspecting and repairing damaged wiring, and replacing the backup lamp switch if necessary.

5. Can a malfunctioning backup lamp affect other vehicle systems and trigger the OBDII code B2545 in a Chevrolet?

- Yes, a malfunctioning backup lamp can impact the vehicle's safety systems and transmission, leading to the triggering of the OBDII code B2545.

6. Is it safe to continue driving with the OBDII code B2545 active in a Chevrolet due to the Backup Lamps Circuit issue?

- It is not recommended to drive with the code active, as it can affect the vehicle's safety and functionality, particularly in low visibility conditions.

7. How much does it typically cost to repair OBDII code B2545 in a Chevrolet related to the Backup Lamps Circuit?

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

8. Can resetting the OBDII system clear the B2545 code related to the Backup Lamps Circuit in a Chevrolet?

- Resetting the system may temporarily clear the code, but it will reappear if the underlying issue causing the code is not addressed.

9. Is it necessary to visit a dealership or can a local mechanic handle the repair for OBDII code B2545 in a Chevrolet?

- A local mechanic with experience in electrical systems can typically handle the repair for OBDII code B2545 related to the Backup Lamps Circuit without the need to visit a dealership.

10. Are there any preventive measures to avoid triggering the OBDII code B2545 in a Chevrolet related to the Backup Lamps Circuit?

- Regularly inspecting and maintaining the backup lights, fuses, and wiring can help prevent issues that may trigger the OBDII code B2545 in a Chevrolet.