2019-2025 Honda Passport Liftgate Control Module: Failure, Diagnosis, and Replacement

Symptoms of a Failing Liftgate Control Module

When the liftgate control module begins to fail, it can cause a range of frustrating issues. Because the module controls the entire system, symptoms can sometimes be mistaken for a bad motor or latch, but they often point back to this central computer. Be on the lookout for the following signs:

• Liftgate is completely unresponsive: Pressing the key fob, dashboard button, or tailgate buttons does nothing. You may or may not hear a beep or a click.
• Intermittent operation: The power liftgate works sometimes but not others. It may fail to open or close randomly.
• Liftgate opens or closes on its own: In rare cases, a faulty module can send phantom signals, causing the tailgate to operate unexpectedly.
• Beeps but no movement: The system may acknowledge the command with a beep, but the tailgate fails to move.
• Gate reverses direction: The liftgate starts to close, then beeps and re-opens as if it detected an obstacle, even when nothing is there. This can sometimes be caused by faulty pinch sensors, but the module is responsible for interpreting those sensor signals.
• Slow or sluggish movement: The gate may operate much slower than usual, indicating a problem with the power being delivered by the module.
• Grinding or clicking noises: While often a sign of a mechanical issue, a faulty module can cause the motor to engage improperly, leading to unusual sounds.

A professional scan tool can often pull specific Diagnostic Trouble Codes (DTCs) from the Body Control Module (BCM) or directly from the liftgate module. While generic code readers may not see these, a more advanced tool can find codes such as:

• B1377: Power Tailgate Inner Switch Circuit Malfunction
• B1378: Power Tailgate Right Touch/Pinch Sensor Circuit Malfunction

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

Water Intrusion: The #1 Killer of Liftgate Modules

Before replacing a failed module, it is critical to identify and repair the source of any water leak. Failure to do so will result in the new module failing as well. Inspect the headliner, the driver's side cargo area trim, and the floor for any signs of moisture or water staining. Some owners have reported leaks from improperly sealed body seams near the roofline.

Recalls and TSBs

As of mid-2026, there are no specific recalls or TSBs from Honda that directly address the liftgate control module on the 2019-2025 Passport. However, other recalls exist for this vehicle, including one for a faulty coaxial cable that can cause the rearview camera image to fail, which is located in the same general area of the vehicle.

Buying a Used Liftgate Control Module

Purchasing a used OEM liftgate control module is a cost-effective way to restore functionality, especially when compared to the high price of a new part from a dealer. However, there are important factors to consider.

Programming and Initialization

This is the most critical aspect of buying this part. The information can be confusing, but here is a breakdown:

• New OEM Modules: A brand-new module from a Honda dealer will almost always require an "initialization" or "updating" procedure using the Honda Diagnostic System (HDS) or a compatible J2534 pass-thru tool. This syncs the new module with your vehicle's specific configuration. This must be done by a dealer or a well-equipped independent shop.
• Used OEM Modules: A used module from a donor vehicle with the exact same trim and options may be plug-and-play, requiring no programming. This is because it's already configured for a similar vehicle. However, this is not guaranteed. Be prepared for the possibility that even a used module may need an initialization procedure to work correctly.

Inspection and Compatibility

• Match the Part Number: The most important step is to match the part number on your original module to the replacement. The primary part number is 74970-TGS-A11. An earlier version was 74970-TGS-A01; the A11 part is the correct and current replacement.
• Check for Water Damage: When buying used, ask the seller to inspect the module for any signs of corrosion or water marks on the casing or connectors. Do not buy a module that shows any evidence of water exposure.
• Verify the Donor Vehicle: If possible, get the VIN or trim level (e.g., Elite, Touring) of the vehicle the part came from. The closer the match to your own vehicle's options, the higher the chance it will be plug-and-play.

Replacement Overview

Replacing the module is a feasible DIY task for those comfortable with removing interior trim panels.

1. Location: The liftgate control module is located in the rear cargo area, behind the driver's side (left) interior trim panel.
2. Procedure: The process involves carefully prying off the rear scuff plate and the large side trim panel to gain access. The module is typically a small black box held by one or two bolts with a few electrical connectors attached.
3. Reset Procedure: Before replacing the module, you can try a simple reset. Some owners of other Honda models have had success by fully opening the tailgate, disconnecting the vehicle's negative battery terminal for 5-10 minutes, manually closing the tailgate, and then reconnecting the battery. This can sometimes clear a fault and restore operation, saving you the cost of a new part.

Cost Comparison

Prices can vary, but here is a general estimate:

Frequently Asked Questions (FAQ)