AutoCodes – Generic – B19F9

B19F9 Code - Left Rear Window Switch Circuit Stuck

Quick Answer

The Left Rear Door Module monitors the Left Rear Window Switch Circuit. Common causes include Faulty Left Rear Window Switch, Left Rear Window Switch harness is open or shorted, Left Rear 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
B19F9 indicates Left Rear Window Switch Circuit Stuck.
Common causes
Common causes include Faulty Left Rear Window Switch, Left Rear Window Switch harness is open or shorted, Left Rear 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 579
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 05, 2019
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Code B19F9 Description

The Left Rear Door Module monitors the Left Rear Window Switch Circuit. The Left Rear Door Module sets the OBDII codes when the Left Rear Window Switch circuit is held below 3.2 volts for over 15 seconds.
OBDII Code B19F9 - Left Rear Window Switch Circuit Stuck - AutoCodes.com
B19F9 Code - Left Rear Window Switch Circuit Stuck

What are the Possible Causes of the DTC B19F9?

  • Faulty Left Rear Window Switch
  • Left Rear Window Switch harness is open or shorted
  • Left Rear Window Switch circuit poor electrical connection
  • Faulty Left Rear Door Module

How to Fix the DTC B19F9?

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 B19F9 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 B19F9 code?

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Need Help with the Code?

Get the B19F9 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 B19F9 Code

1. What are the common symptoms of OBDII code B19F9 (Left Rear Window Switch Circuit Stuck)?

- The common symptoms include the left rear window being inoperative or stuck in a certain position, failure to respond to the switch inputs, and potential issues with other window switches in the vehicle.

2. What are the possible causes of the B19F9 trouble code?

- The code B19F9 can be caused by a faulty left rear window switch, damaged wiring or connectors in the circuit, a malfunctioning window motor, or a problem with the window regulator.

3. How can I diagnose the cause of the Left Rear Window Switch Circuit Stuck code?

- You can start by checking the left rear window switch for proper functioning, inspecting the wiring and connectors for any damage, testing the window motor, and ensuring the window regulator is operating correctly.

4. Can a DIY enthusiast repair the B19F9 code issue?

- Depending on the exact cause, DIY repairs may be possible for those with automotive repair experience. However, electrical issues can be complex, so it's recommended to consult a professional if you're unsure.

5. What are some tips for repairing the Left Rear Window Switch Circuit Stuck code?

- Tips include checking the fuse related to the left rear window circuit, performing a visual inspection of the switch and wiring, testing the switch for continuity, and ensuring proper voltage is reaching the window motor.

6. Is it safe to continue driving with the B19F9 trouble code present?

- While the vehicle may still be operable with the code, it's not recommended to ignore window switch issues as they can lead to safety concerns or potential inconvenience. It's best to address the problem promptly.

7. Can a faulty left rear window switch cause other electrical problems in the vehicle?

- Yes, a malfunctioning left rear window switch can sometimes cause electrical issues in the vehicle, such as draining the battery if the switch remains active or affecting other components on the same circuit.

8. How much does it typically cost to repair the Left Rear Window Switch Circuit Stuck code?

- The cost of repairs can vary depending on the exact cause of the issue, the labor rates in your area, and whether you choose to replace the faulty component yourself or have it done by a professional technician.

9. Are there any preventive measures to avoid the B19F9 trouble code in the future?

- To prevent the Left Rear Window Switch Circuit Stuck code, you can periodically inspect the condition of your window switches, avoid overloading the windows, and address any window operation issues promptly to prevent further damage.

10. Can I reset the B19F9 trouble code myself after repairing the issue?

- Yes, once the underlying problem causing the B19F9 code is fixed, you can reset the trouble code using an OBDII scanner or by disconnecting the battery for a short period to clear the vehicle's memory.

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