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B3172 Buick Code - Right Front Window Up Switch Circuit Low

Quick Answer

This Diagnostic Trouble Code (DTC) is generated by a passenger door window switch or a passenger door window switch circuit. Common causes include Faulty Right Front Window Switch, Right Front Window Switch harness is open or shorted, Right Front Window Switch circuit poor electrical connection. 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
B3172 Buick indicates Right Front Window Up Switch Circuit Low.
Common causes
Common causes include Faulty Right Front Window Switch, Right Front Window Switch harness is open or shorted, Right Front Window Switch circuit poor electrical connection.
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.
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Code Popularity 506
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Mar 04, 2020
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Code B3172 Buick Description

This Diagnostic Trouble Code (DTC) is generated by a passenger door window switch or a passenger door window switch circuit. Each passenger door window switch is mounted to the trim panel of the appropriate passenger door. The circuits and contacts of each passenger door window switch receive battery voltage and ground from the corresponding door module, i.e. Front Passenger Door Module (PDM), Left Rear Door Module (LRDM), or Right Rear Door Module (RRDM). When a passenger door window switch is operated, the switch contacts close and the associated door module interprets the flow of voltage as a specific request to move the window up or down. If conditions are correct for window operation to occur, the door module then powers the associated window motor and circuits to move the window.
OBDII Code B3172 Buick - Right Front Window Up Switch Circuit Low - AutoCodes.com
B3172 Buick Code - Right Front Window Up Switch Circuit Low
What does this mean?

What are the Possible Causes of the DTC B3172 Buick?

  • Faulty Right Front Window Switch
  • Right Front Window Switch harness is open or shorted
  • Right Front Window Switch circuit poor electrical connection
  • Faulty Front Passenger Door Module (PDM)

How to Fix the DTC B3172 Buick?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3172 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B3172 Buick code?

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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.

Frequently Asked Questions about B3172 Buick Code

1. What does the OBDII code B3172 mean on a Buick?

The B3172 code indicates a "Right Front Window Up Switch Circuit Low," meaning the vehicle's control module has detected a low voltage issue in the up switch circuit for the right front window.

2. What are common symptoms of the B3172 code in a Buick?

Symptoms may include the right front window not rolling up, intermittent window operation, or a non-responsive window switch.

3. What causes the B3172 code to appear in a Buick?

Possible causes include a faulty window switch, damaged wiring or connectors in the circuit, a malfunctioning window motor, or a failing control module.

4. How is the B3172 code diagnosed?

A technician will inspect the window switch, check the wiring and connectors for damage, test the window motor, and verify voltage levels in the circuit using a multimeter.

5. Can I still drive my Buick with a B3172 code?

Yes, the vehicle is safe to drive, but the right front window may not function properly, which could be inconvenient or a safety concern in certain situations.

6. How do I fix the B3172 code on my Buick?

Repairs may include replacing the window switch, repairing damaged wires or connectors, replacing the window motor, or reprogramming/replacing the control module if necessary.

7. How much does it cost to repair the B3172 code?

Repair costs vary depending on the issue, but replacing a window switch typically costs $50–$150, while wiring repairs or motor replacements may cost more.

8. Can I fix the B3172 code myself?

If you're comfortable working with electrical systems, you can inspect and replace the window switch or repair visible wiring issues. Otherwise, it's best to consult a professional.

9. Will clearing the B3172 code solve the problem?

Clearing the code may temporarily remove it from the system, but if the underlying issue isn’t fixed, the code will likely return.

10. What tools are needed to diagnose the B3172 code?

Basic tools include a multimeter for voltage testing, a scan tool to read and clear codes, and wiring diagrams for troubleshooting the circuit.

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