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AutoCodes - Generic - B3820

B3820 Code - Left Rear Window Down Control Circuit

- Code Popularity: 620 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B3820?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Left Rear Power Window Switch
  • Left Rear Power Window Switch harness is open or shorted
  • Left Rear Power Window Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)
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How to Fix the DTC B3820?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3820 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code B3820 Description

The Body Control Module (BCM) grounds the control side of the left rear power window down relay upon receiving a class 2 message from the Driver Door Module (DDM). The Diagnostic Trouble Code (DTC) sets when the BCM has grounded the left rear power window down relay control circuit and the control circuit is shorted to battery positive voltage.

OBDII Code B3820 - Left Rear Window Down Control Circuit - AutoCodes.com
B3820 Code - Left Rear Window Down Control Circuit

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Code B3820 comments

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