AutoCodes – Chevrolet – B2545 2018 Chevrolet Silverado

B2545 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 193

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B2545 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Backup Lamps Circuit - AutoCodes.com — B2545 2018 Chevrolet Silverado Code - Backup Lamps Circuit

What does this mean?

What are the Possible Causes of the DTC B2545 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the B2545 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2545 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2018 Chevrolet Silverado Code

1. What does OBDII code B2545 mean on a 2018 Chevrolet Silverado?

The code B2545 indicates a problem with the Backup Lamps Circuit on a 2018 Chevrolet Silverado.

2. What are the common symptoms of OBDII code B2545 on a 2018 Chevrolet Silverado?

Common symptoms include non-functioning backup lights, flickering lights, or a dashboard warning light indicating an issue with the backup lamps.

3. What are the possible causes of OBDII code B2545 on a 2018 Chevrolet Silverado?

Possible causes include a faulty backup lamp switch, damaged wiring or connectors, blown fuses, or a malfunctioning control module.

4. How can I diagnose the issue related to OBDII code B2545 on my 2018 Chevrolet Silverado?

You can start by checking the backup lamp fuse, inspecting the wiring for any visible damage, and testing the backup lamp switch with a multimeter to determine if it is functioning properly.

5. Can I repair OBDII code B2545 on a 2018 Chevrolet Silverado myself?

Depending on your skill level, you may be able to repair the issue yourself by replacing the faulty backup lamp switch, repairing damaged wiring, or addressing any blown fuses. However, if you are unsure, it is recommended to seek professional assistance.

6. Is it safe to continue driving with OBDII code B2545 present on a 2018 Chevrolet Silverado?

It is not recommended to drive with unresolved OBDII code B2545, as non-functioning backup lamps can compromise your safety, especially when reversing in low visibility conditions.

7. How much does it typically cost to repair OBDII code B2545 on a 2018 Chevrolet Silverado?

The cost of repairing OBDII code B2545 can vary depending on the exact cause of the issue and whether you perform the repairs yourself or take your vehicle to a mechanic. Costs may include parts and labor.

8. Are there any preventive maintenance tips to avoid encountering OBDII code B2545 on a 2018 Chevrolet Silverado?

Regularly inspecting the backup lamps, fuses, and wiring for any signs of wear or damage can help prevent issues that may trigger OBDII code B2545.

9. Can extreme weather conditions affect the Backup Lamps Circuit and trigger OBDII code B2545 on a 2018 Chevrolet Silverado?

Yes, extreme weather conditions such as extreme heat or cold can potentially affect the backup lamp components, leading to malfunctions that trigger OBDII code B2545.

10. How long does it typically take to repair OBDII code B2545 on a 2018 Chevrolet Silverado?

The repair time for OBDII code B2545 can vary depending on the specific cause of the issue and the complexity of the repair. Simple fixes like replacing a fuse may take a short time, while more extensive repairs could take longer.