AutoCodes – Chrysler – B2874 Chrysler

B2874 Chrysler Code - Right Reverse Lamp 2 Control Circuit Short

Quick Answer

The Body Control Module (BCM) receives a communication network message from the Steering Column Control Module (SCCM) requesting turn signal lamp illumination. Common causes include Faulty Right Rear Turn Lamp Driver, Right Rear Turn Lamp Driver harness is open or shorted, Right Rear Turn Lamp Driver 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: B2874 Chrysler indicates Right Reverse Lamp 2 Control Circuit Short.
Common causes: Common causes include Faulty Right Rear Turn Lamp Driver, Right Rear Turn Lamp Driver harness is open or shorted, Right Rear Turn Lamp Driver 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 530

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 Feb 18, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B2874 Chrysler Description

The Body Control Module (BCM) receives a communication network message from the Steering Column Control Module (SCCM) requesting turn signal lamp illumination. When this bus message is received, the BCM provides a pulsed voltage output through the rear turn signal control circuit. The rear turn signal control circuit connects to the Turn Signal Lamps. The Diagnostic Trouble Code (DTC) sets when the Body Control Module (BCM) detects a low condition on the Right Rear Turn Lamp Driver circuit.

OBDII Code B2874 Chrysler - Right Reverse Lamp 2 Control Circuit Short - AutoCodes.com — B2874 Chrysler Code - Right Reverse Lamp 2 Control Circuit Short

What does this mean?

What are the Possible Causes of the DTC B2874 Chrysler?

Faulty Right Rear Turn Lamp Driver
Right Rear Turn Lamp Driver harness is open or shorted
Right Rear Turn Lamp Driver circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2874 Chrysler?

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

B2874-11 RIGHT REVERSE LAMP 2 CONTROL CIRCUIT SHORT TO GROUND
B2874-15 RIGHT REVERSE LAMP 2 CONTROL CIRCUIT SHORT TO BATTERY OR OPEN

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2874 Chrysler 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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Need Help with the Code?

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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 B2874 Chrysler Code

1. What does the OBDII code B2874 mean on a Chrysler?

The code B2874 indicates a problem with the Right Reverse Lamp 2 Control Circuit, specifically a short to ground, power, or an open circuit.

2. What are common symptoms of the B2874 code?

Symptoms may include the right reverse lamp not illuminating, a warning light on the dashboard, or issues with the vehicle's reverse lighting system.

3. What causes the B2874 code to appear?

Common causes include damaged wiring, corroded connectors, a faulty reverse lamp bulb, or a malfunctioning Body Control Module (BCM).

4. How do I diagnose the B2874 code?

Start by inspecting the right reverse lamp, its wiring, and connectors for damage or corrosion. Use a multimeter to check for continuity and shorts in the circuit.

5. Can I drive my Chrysler with the B2874 code active?

While the vehicle is generally safe to drive, the reverse lights may not work properly, reducing visibility and safety when reversing.

6. How can I fix the B2874 code?

Repairs may include replacing a faulty bulb, repairing or replacing damaged wiring, cleaning corroded connectors, or, in rare cases, replacing the BCM.

7. How much does it cost to fix the B2874 code?

The cost depends on the specific issue, ranging from a few dollars for a bulb replacement to several hundred dollars for wiring repairs or BCM replacement.

8. Can a blown fuse cause the B2874 code?

Yes, a blown fuse in the reverse lamp circuit can cause the code by interrupting power to the right reverse lamp.

9. Will clearing the B2874 code fix the problem?

Clearing the code will only reset the warning temporarily. The underlying issue must be resolved to prevent the code from returning.

10. Do I need a professional mechanic to fix the B2874 code?

If youâ€™re comfortable with basic electrical diagnostics and repairs, you can attempt to fix it yourself. Otherwise, consult a professional mechanic for assistance.