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AutoCodes - Generic - B3971

B3971 Code - Folding Top Position Sensor

- Code Popularity: 611 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B3971?

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 Folding Top Position Sensor
  • Folding Top Position Sensor harness is open or shorted
  • Folding Top Position Sensor circuit poor electrical connection
  • Faulty Folding Top Control (FTC) Module
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How to Fix the DTC B3971?

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 B3971 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 B3971 Description

The Folding Top Control (FTC) Module supplies accessory voltage to the top open and closed limit switches. It monitors the signal circuits of these switches to determine the open and closed position of the top. When the top is in the closed position the following definitions of the limit switches should be true: Top Closed Switch-The switch will be closed to voltage and the scan tool parameter should display Active and Top Open Switch-The switch will be open and the scan tool parameter should display Inactive. The FTC module will set B3971 as a current Diagnostic Trouble Code (DTC) if it senses that both the top open and top closed limit switches are active at the same time.

OBDII Code B3971 - Folding Top Position Sensor - AutoCodes.com
B3971 Code - Folding Top Position Sensor

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Code B3971 comments

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