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Engine-Codes – Generic – B2847

B2847 Code - Driver Blind Spot Warning Light Control Circuit High

Quick Answer

The B2847 diagnostic trouble code (DTC) indicates a malfunction in the driver blind spot warning light control circuit, specifically signaling that the circuit is experiencing a high voltage condition. Common causes include A short circuit in the wiring harness connected to the blind spot sensors, Faulty blind spot sensors that are unable to communicate correctly with the control module, Corrosion or damage to the electrical connectors associated with the blind spot warning system. 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 indicates Driver Blind Spot Warning Light Control Circuit High.
Common causes
Common causes include A short circuit in the wiring harness connected to the blind spot sensors, Faulty blind spot sensors that are unable to communicate correctly with the control module, Corrosion or damage to the electrical connectors associated with the blind spot warning system.
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 17, 2024
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Code B2847 Description

The B2847 diagnostic trouble code (DTC) indicates a malfunction in the driver blind spot warning light control circuit, specifically signaling that the circuit is experiencing a high voltage condition. This code is part of the vehicle's advanced driver-assistance systems (ADAS) that monitor blind spots to enhance safety during lane changes and merges. When the blind spot monitoring system is functioning correctly, sensors located in the rear corners of the vehicle detect vehicles in adjacent lanes and illuminate warning lights on the side mirrors to alert the driver.

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

Common Causes of B2847

  1. A short circuit in the wiring harness connected to the blind spot sensors.
  2. Faulty blind spot sensors that are unable to communicate correctly with the control module.
  3. Corrosion or damage to the electrical connectors associated with the blind spot warning system.
  4. A malfunctioning control module that processes signals from the blind spot sensors.
  5. Software issues or faults within the vehicle's ADAS that require reprogramming or updates.

Symptoms of B2847

  1. The blind spot warning lights do not illuminate when vehicles are detected in adjacent lanes.
  2. The dashboard displays a warning message related to the blind spot monitoring system.
  3. Inconsistent operation of the blind spot warning system, such as intermittent alerts.
  4. The blind spot monitoring system is completely inoperative.
  5. Other related warning lights may illuminate on the dashboard, indicating potential electrical issues.

How to Fix B2847

  1. Visual Inspection: Begin with a thorough visual inspection of the wiring harness and connectors associated with the blind spot warning system for any signs of damage, corrosion, or loose connections.
  2. Test Voltage Levels: Use a multimeter to measure the voltage levels at the blind spot sensors and the control module to confirm the high voltage condition and identify the source of the problem.
  3. Replace Faulty Components: If any sensors or wiring are found to be faulty, replace them with OEM or high-quality aftermarket parts to ensure proper functionality.
  4. Reprogram Control Module: If the control module is suspected to be malfunctioning, it may need to be reprogrammed or replaced, depending on the diagnosis.
  5. Clear Codes and Test Drive: After repairs, clear the diagnostic trouble codes using a scan tool and perform a test drive to ensure the blind spot warning system operates correctly.

Cost to Fix B2847

The typical repair costs for addressing the B2847 code can vary widely based on the specific diagnosis and repairs needed. Basic repairs, such as replacing a faulty sensor or repairing wiring, may range from $150 to $500. More extensive repairs, such as replacing the control module, can cost between $500 and $1,200. Labor rates can vary significantly depending on location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour; metropolitan areas or dealerships may have higher rates, while independent shops often charge less. It is advisable to check local rates for a more precise estimate.

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Code B2847 Information for Specific Makes

  • B2847 Chrysler — Driver Blind Spot Warning Light Control Circuit High
  • B2847 Dodge — Driver Blind Spot Warning Light Control Circuit High
  • B2847 Jeep — Driver Blind Spot Warning Light Control Circuit High
  • B2847 RAM — Driver Blind Spot Warning Light Control Circuit High
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 Code

1. What are the common symptoms of OBDII code B2847 (Driver Blind Spot Warning Light Control Circuit High)?

The common symptoms of code B2847 include the blind spot warning light staying illuminated or flashing erratically on the dashboard.

2. What are the possible causes of OBDII code B2847?

Possible causes of code B2847 include a faulty blind spot warning control module, wiring issues in the control circuit, or a malfunctioning blind spot monitoring system sensor.

3. How can I diagnose OBDII code B2847?

Diagnosing code B2847 involves using an OBDII scanner to retrieve the code, checking the wiring and connections related to the blind spot warning system, and testing the blind spot monitoring sensors for proper functionality.

4. Can a DIY enthusiast repair OBDII code B2847 at home?

While some basic troubleshooting steps can be taken at home, repairing code B2847 often requires advanced diagnostic equipment and expertise. It is recommended to seek professional help for accurate diagnosis and repair.

5. Is it safe to drive with OBDII code B2847 present?

If the blind spot monitoring system is not functioning correctly due to code B2847, it may compromise your ability to detect vehicles in your blind spots. It is advisable to address the issue promptly to ensure safe driving.

6. How much does it typically cost to repair OBDII code B2847?

The cost of repairing code B2847 can vary depending on the root cause of the issue. It is recommended to obtain a diagnostic assessment from a qualified mechanic to determine the exact repair costs.

7. Can resetting the OBDII system clear code B2847?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code B2847 is not addressed, the code is likely to reappear after some driving cycles.

8. Will disconnecting the battery reset OBDII code B2847?

Disconnecting the battery may reset the ECU and clear the code temporarily, but it is not a guaranteed fix for resolving the underlying issue causing code B2847.

9. How long does it take to repair OBDII code B2847?

The repair time for code B2847 can vary depending on the complexity of the issue and the availability of replacement parts. It is advisable to consult with a professional technician for an accurate estimate of the repair duration.

10. Can extreme weather conditions trigger OBDII code B2847?

Extreme weather conditions such as heavy rain or snow may potentially affect the blind spot monitoring system, leading to the triggering of code B2847. It is essential to keep the system well maintained to prevent weather-related malfunctions.

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