Engine-Codes.com
Engine-Codes – Chevrolet – B3387 Chevrolet

B3387 Chevrolet Code - Right Front Window Up Switch Circuit Low

Quick Answer

The B3387 diagnostic trouble code (DTC) indicates a malfunction in the right front window up switch circuit within a Chevrolet vehicle. Common causes include Faulty right front window switch that fails to send the correct signal, Damaged or corroded wiring in the window switch circuit, Malfunctioning body control module (BCM) that misinterprets the switch input. 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
B3387 Chevrolet indicates Right Front Window Up Switch Circuit Low.
Common causes
Common causes include Faulty right front window switch that fails to send the correct signal, Damaged or corroded wiring in the window switch circuit, Malfunctioning body control module (BCM) that misinterprets the switch input.
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 21, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B3387 Chevrolet Description

The B3387 diagnostic trouble code (DTC) indicates a malfunction in the right front window up switch circuit within a Chevrolet vehicle. This code is triggered when the powertrain control module (PCM) detects a low voltage condition in the circuit responsible for controlling the window's upward movement. The window switch sends a signal to the body control module (BCM), which then regulates the power to the window motor. A low voltage condition can disrupt this communication, leading to a failure in the window's operation.

OBDII Code B3387 Chevrolet - Right Front Window Up Switch Circuit Low
B3387 Chevrolet Code - Right Front Window Up Switch Circuit Low

Common Causes of B3387 Chevrolet

  1. Faulty right front window switch that fails to send the correct signal.
  2. Damaged or corroded wiring in the window switch circuit.
  3. Malfunctioning body control module (BCM) that misinterprets the switch input.
  4. Poor ground connection affecting the circuit's voltage levels.
  5. A short circuit or open circuit within the window motor assembly.

Symptoms of B3387 Chevrolet

  1. Right front window does not respond when the switch is pressed.
  2. Intermittent operation of the right front window, where it may work sporadically.
  3. Other windows may exhibit erratic behavior, suggesting a broader electrical issue.
  4. Warning lights or messages on the dashboard related to the window system.
  5. Unusual noises from the window motor when attempting to operate the window.

How to Fix B3387 Chevrolet

  1. Visual Inspection: Begin by inspecting the right front window switch and wiring for any visible damage, corrosion, or loose connections. Ensure that all connectors are secure and free from dirt or moisture.
  2. Test the Window Switch: Use a multimeter to check the functionality of the right front window switch. If it does not register the correct voltage when pressed, it may need to be replaced.
  3. Check Wiring and Connections: Trace the wiring from the switch to the BCM, looking for any signs of wear, fraying, or corrosion. Repair or replace any damaged wiring as needed.
  4. Inspect the BCM: If the switch and wiring are in good condition, test the BCM for proper operation. This may require specialized diagnostic equipment to communicate with the module.
  5. Replace Components: If any faulty components are identified during testing (switch, wiring, or BCM), replace them with OEM or high-quality aftermarket parts to ensure reliability.

Cost to Fix B3387 Chevrolet

The typical repair costs for addressing the B3387 code can vary widely based on the specific diagnosis and the components that need replacement. On average, you might expect to pay between $150 and $600 for repairs, including parts and labor. The cost of a window switch may range from $50 to $150, while a BCM can be significantly more expensive, often exceeding $300. Labor costs 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 may offer more competitive pricing. It's advisable to consult local repair shops for a more precise estimate based on your vehicle's specific needs.

Need more information about the B3387 Chevrolet code?

Need more information on how to fix the B3387 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3387 Chevrolet 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 B3387 Chevrolet Code

No Frequently Asked Questions about B3387 Chevrolet Code found.

Discuss the causes and fixes for B3387 Chevrolet OBDII Code

Submit a New Comment

Code B3387 Chevrolet comments

No comments found for this page.