B1422 – OBD-II DTC

OBD-II DTC B1422 – Power Window RR Motor Circuit Failure

DTC B1422 meaning

DTC B1422 refers to a diagnostic trouble code indicating a failure in the power window rear right motor circuit. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components and systems for faults. When the power window motor for the rear right window does not operate as expected, this code is triggered, signaling a potential issue with the motor, wiring, or related components.

DTC B1422 symptoms

Common symptoms associated with DTC B1422 may include:

• The rear right power window does not operate.
• Intermittent operation of the rear right power window.
• Other power windows may function normally.
• Possible blown fuses related to the power window circuit.

DTC B1422 causes

Several factors can lead to the triggering of DTC B1422, including:

• Faulty rear right power window motor.
• Damaged or corroded wiring in the power window circuit.
• Defective power window switch.
• Blown fuse in the power window circuit.
• Issues with the vehicle’s body control module (BCM).

DTC B1422 seriousness

DTC B1422 is considered a moderate issue. While it does not typically affect the vehicle’s drivability, it can lead to inconvenience and safety concerns, especially if the window is stuck in an open or closed position. Addressing this code promptly is advisable to ensure proper functionality of the power window system.

How to diagnose DTC B1422

To diagnose DTC B1422, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1422 code.
2. Inspect the rear right power window motor for visible damage or wear.
3. Check the wiring and connectors for signs of corrosion or disconnection.
4. Test the power window switch for proper operation.
5. Examine the fuse related to the power window circuit and replace if necessary.
6. Perform a continuity test on the wiring to ensure there are no breaks.
7. If all components appear functional, consider testing the body control module.

How to fix DTC B1422 step-by-step instructions

To fix DTC B1422, follow these step-by-step instructions:

1. Confirm the DTC B1422 code using an OBD-II scanner.
2. Inspect the rear right power window motor for any physical damage.
3. Check the wiring harness for any signs of wear, fraying, or corrosion.
4. Test the power window switch for functionality replace if faulty.
5. Examine the fuse box for any blown fuses related to the power window circuit and replace as needed.
6. If the motor and switch are functional, test the body control module for any faults.
7. After repairs, clear the DTC using the OBD-II scanner and test the power window operation.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.