Engine-CodesGeneric – U0216

U0216 Code - Lost Communication With Door Switch Module 'B'

Quick Answer

The U0216 diagnostic trouble code indicates that the vehicle's onboard computer has lost communication with the Door Switch Module 'B'. Common causes include Faulty Door Switch Module 'B', Wiring or connection issues, Corrosion in the electrical 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
U0216 indicates Lost Communication With Door Switch Module 'B'.
Common causes
Common causes include Faulty Door Switch Module 'B', Wiring or connection issues, Corrosion in the electrical 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.
Table of contents Created and updated by William Orellana on Aug 25, 2024
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Code U0216 Description

The U0216 diagnostic trouble code indicates that the vehicle's onboard computer has lost communication with the Door Switch Module 'B'. The Door Switch Module 'B' is responsible for controlling various functions related to the doors, such as power windows, power door locks, and interior lighting. When communication is lost with this module, it can lead to issues with door operations and potentially affect the vehicle's overall functionality.

OBDII Code U0216 - Lost Communication With Door Switch Module 'B'
U0216 Code - Lost Communication With Door Switch Module 'B'

Common Causes of U0216

  1. Faulty Door Switch Module 'B'
  2. Wiring or connection issues
  3. Corrosion in the electrical system
  4. Software glitches in the vehicle's computer system

Symptoms of U0216

  1. Non-responsive power windows
  2. Inoperative power door locks
  3. Malfunctioning interior lighting
  4. Dashboard warning lights related to door systems

How to Fix U0216

  1. Diagnose the U0216 code using a diagnostic scanner to identify the specific cause of the communication loss with the Door Switch Module 'B'.
  2. Inspect the wiring and connections related to the Door Switch Module 'B' for any damage or corrosion.
  3. Test the Door Switch Module 'B' for functionality and replace if necessary.
  4. Clear the trouble code from the vehicle's computer system after the repair is completed.
  5. Perform a final test to ensure that communication with the Door Switch Module 'B' has been restored and that all door systems are functioning correctly.

Cost to Fix U0216

The typical repair costs for addressing the U0216 code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a faulty Door Switch Module 'B' and addressing related wiring or connection issues can cost anywhere from $200 to $500, including parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on the vehicle make and model.

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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.

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