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Engine-Codes – Generic – B1420

B1420 Code - Passenger Power Window Motor Circuit Short To Battery

Quick Answer

The diagnostic trouble code B1420 indicates a problem with the passenger power window motor circuit shorting to the battery. Common causes include Damaged or corroded wiring in the power window circuit, Faulty power window switch, Malfunctioning power window motor. 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
B1420 indicates Passenger Power Window Motor Circuit Short To Battery.
Common causes
Common causes include Damaged or corroded wiring in the power window circuit, Faulty power window switch, Malfunctioning power window motor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code B1420 Description

The diagnostic trouble code B1420 indicates a problem with the passenger power window motor circuit shorting to the battery. This means that there is an electrical issue within the circuit that controls the passenger side power window motor, causing it to receive power directly from the battery when it shouldn't. This can lead to various problems with the functionality of the power window, including issues with opening or closing the window, intermittent operation, or complete failure.

OBDII Code B1420 - Passenger Power Window Motor Circuit Short To Battery
B1420 Code - Passenger Power Window Motor Circuit Short To Battery

Common Causes of B1420

  1. Damaged or corroded wiring in the power window circuit.
  2. Faulty power window switch.
  3. Malfunctioning power window motor.
  4. Short circuit in the wiring harness.
  5. Issues with the control module or relay.

Symptoms of B1420

  1. Inability to open or close the passenger side power window.
  2. Intermittent operation of the power window.
  3. Unusual noises coming from the power window motor.
  4. Power window operates slowly or struggles to move.

How to Fix B1420

  1. Begin by diagnosing the exact cause of the short circuit using a multimeter to test the continuity of the wiring and components in the power window circuit.
  2. Inspect the wiring harness for any signs of damage or corrosion, and repair or replace any affected wires.
  3. Test the power window switch for proper functionality and replace if necessary.
  4. Check the power window motor for proper operation and replace if it is found to be faulty.
  5. Ensure that all connections in the power window circuit are secure and free of corrosion.

Cost to Fix B1420

The cost of repairing a passenger power window motor circuit short to battery can vary depending on the exact cause of the issue and the labor rates in your area. On average, you can expect to pay between $150 to $300 for parts and labor. Keep in mind that additional costs may apply if other components need to be replaced or if there are underlying electrical issues that need to be addressed. It is recommended to consult with a professional mechanic for a more accurate cost estimate based on your specific vehicle and location.

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Code B1420 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 B1420 Code

1. What are the common symptoms of OBDII code B1420 - Passenger Power Window Motor Circuit Short To Battery?

The common symptoms include the passenger power window not functioning at all or only working intermittently, unusual noises coming from the window motor, or the window getting stuck in one position.

2. What are the possible causes of OBDII code B1420 - Passenger Power Window Motor Circuit Short To Battery?

Possible causes include damaged wiring in the power window circuit, a short to battery in the power window motor circuit, a faulty power window switch, or a malfunctioning power window motor.

3. How can I diagnose OBDII code B1420 - Passenger Power Window Motor Circuit Short To Battery?

Diagnosing this code involves visually inspecting the power window wiring for damage, testing the power window switch for proper function, checking the power window motor for shorts, and using a multimeter to test for voltage irregularities.

4. Can I still drive my vehicle with OBDII code B1420 - Passenger Power Window Motor Circuit Short To Battery?

It is generally safe to drive the vehicle with this code, but you may experience inconvenience due to the non-functioning power window. It is recommended to address the issue promptly to avoid further damage.

5. How can I repair OBDII code B1420 - Passenger Power Window Motor Circuit Short To Battery?

Repairing this code may involve repairing or replacing damaged wiring in the power window circuit, replacing a faulty power window switch, or replacing the power window motor if necessary.

6. Is it possible to reset OBDII code B1420 - Passenger Power Window Motor Circuit Short To Battery without repairs?

Resetting the code without addressing the underlying issue will not solve the problem permanently. It is recommended to diagnose and repair the root cause to prevent the code from reoccurring.

7. Can extreme weather conditions cause OBDII code B1420 - Passenger Power Window Motor Circuit Short To Battery?

Extreme weather conditions can potentially contribute to wiring damage in the power window circuit, which may lead to shorts and trigger this OBDII code.

8. Are there any preventative maintenance tips to avoid OBDII code B1420 - Passenger Power Window Motor Circuit Short To Battery?

Regularly inspecting the power window wiring for signs of wear or damage, avoiding forcing the power window to operate when obstructed, and using the power window system responsibly can help prevent this issue.

9. How long does it typically take to repair OBDII code B1420 - Passenger Power Window Motor Circuit Short To Battery?

The repair time can vary depending on the specific cause of the issue and the extent of the damage. Simple repairs like fixing wiring may take a short time, while motor or switch replacements may require more time.

10. Can a DIY enthusiast fix OBDII code B1420 - Passenger Power Window Motor Circuit Short To Battery?

DIY enthusiasts with automotive repair experience and the necessary tools can potentially address this code by following repair guides and procedures. However, if unsure, it is recommended to seek professional help to avoid further complications.

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