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Engine-Codes – RAM – B2847 RAM

B2847 RAM Code - Driver Blind Spot Warning Light Control Circuit High

Quick Answer

The B2847 diagnostic trouble code (DTC) indicates a problem with the Driver Blind Spot Warning Light Control Circuit, specifically that the circuit is registering a high voltage condition. Common causes include Short circuit in the wiring harness connected to the blind spot warning system, Faulty blind spot sensor(s) that may be malfunctioning or damaged, Corroded or loose electrical connectors that disrupt the signal flow. 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
B2847 RAM indicates Driver Blind Spot Warning Light Control Circuit High.
Common causes
Common causes include Short circuit in the wiring harness connected to the blind spot warning system, Faulty blind spot sensor(s) that may be malfunctioning or damaged, Corroded or loose electrical connectors that disrupt the signal flow.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 27, 2024
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Code B2847 RAM Description

The B2847 diagnostic trouble code (DTC) indicates a problem with the Driver Blind Spot Warning Light Control Circuit, specifically that the circuit is registering a high voltage condition. This code is typically associated with vehicles equipped with advanced driver-assistance systems (ADAS) that monitor blind spots to enhance safety during lane changes and merges. The blind spot monitoring system relies on sensors, usually located in the rear corners of the vehicle, to detect vehicles in adjacent lanes. When the system detects a vehicle in the blind spot, it activates a warning light on the side mirror or dashboard to alert the driver.

OBDII Code B2847 RAM - Driver Blind Spot Warning Light Control Circuit High
B2847 RAM Code - Driver Blind Spot Warning Light Control Circuit High

Common Causes of B2847 RAM

  1. Short circuit in the wiring harness connected to the blind spot warning system.
  2. Faulty blind spot sensor(s) that may be malfunctioning or damaged.
  3. Corroded or loose electrical connectors that disrupt the signal flow.
  4. Open circuit due to broken or frayed wires in the blind spot warning light control circuit.
  5. Software issues or faults in the vehicle's body control module (BCM) that manages the blind spot monitoring system.

Symptoms of B2847 RAM

  1. The blind spot warning light on the side mirror or dashboard is illuminated continuously or intermittently.
  2. The blind spot monitoring system fails to activate or provide warnings when vehicles are present in the blind spot.
  3. Other warning lights on the dashboard may illuminate, indicating a broader electrical issue.
  4. Inconsistent operation of the blind spot monitoring system, such as false alerts or failure to detect vehicles.
  5. Possible electrical issues in other systems, such as the turn signal or lane departure warning systems, due to shared circuitry.

How to Fix B2847 RAM

  1. Visual Inspection: Begin with a thorough visual inspection of the wiring harness and connectors associated with the blind spot warning system. Look for signs of damage, corrosion, or loose connections.
  2. Test the Sensors: Use a multimeter to test the blind spot sensors for proper voltage and functionality. Replace any faulty sensors as needed.
  3. Repair Wiring Issues: If any broken or frayed wires are found during the inspection, repair or replace them to restore proper circuit integrity.
  4. Check for Software Updates: Ensure that the vehicle's software is up to date, as manufacturers may release updates that resolve known issues with the blind spot monitoring system.
  5. Clear Codes and Test Drive: After repairs, clear the B2847 code from the vehicle's computer and perform a test drive to ensure that the blind spot monitoring system is functioning correctly and that the warning light does not reappear.

Cost to Fix B2847 RAM

The cost to repair the B2847 code can vary significantly based on the specific diagnosis and repair required. On average, you might expect to pay between $150 and $600 for parts and labor. Simple repairs, such as fixing wiring issues or replacing connectors, may cost on the lower end of that range, while replacing sensors or more extensive electrical work could push costs higher. Labor rates typically range from $80 to $150 per hour, depending on the shop's location and reputation. In metropolitan areas or at dealerships, rates may be higher, while independent shops often offer more competitive pricing. It is advisable to check local rates and obtain multiple estimates for a more precise cost assessment.

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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 B2847 RAM Code

1. What does the OBDII code B2847 mean for a RAM vehicle?

The B2847 code indicates a high voltage issue in the Driver Blind Spot Warning Light Control Circuit, which is part of the blind spot monitoring system.

2. What are the common symptoms of the B2847 code?

Symptoms include a malfunctioning blind spot warning light, the light staying on or off, and possibly a warning message or alert on the dashboard.

3. What causes the B2847 code to appear?

Causes can include a faulty blind spot warning light, damaged wiring or connectors in the circuit, a short circuit, or a malfunctioning blind spot monitoring module.

4. Can I still drive my RAM vehicle with the B2847 code active?

Yes, you can drive the vehicle, but the blind spot monitoring system may not work correctly, increasing the risk of an accident if you rely on it.

5. How do I diagnose the B2847 code in a RAM vehicle?

Diagnosis involves checking for damaged wiring, inspecting the blind spot warning light for faults, and using a diagnostic tool to test the blind spot monitoring system.

6. What repairs are needed to fix the B2847 code?

Repairs may include replacing the blind spot warning light, repairing or replacing damaged wiring or connectors, or replacing a defective blind spot monitoring module.

7. How much does it cost to fix the B2847 code?

Repair costs vary but can range from $50 to $200 for wiring repairs and $300 to $600 if the blind spot monitoring module needs replacement.

8. Can I fix the B2847 code issue myself?

If you're experienced with automotive electrical systems, you can inspect and repair wiring or replace the warning light. For advanced diagnostics, professional assistance is recommended.

9. Will clearing the B2847 code with an OBDII scanner fix the issue?

Clearing the code will reset the warning temporarily, but the issue will return if the underlying problem is not resolved.

10. What tools do I need to troubleshoot the B2847 code?

You’ll need an OBDII scanner, a multimeter to check voltage and continuity, and possibly wiring diagrams for the blind spot monitoring system.

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