2019-2023 Honda Passport Auto Start Stop Eliminator

If your Honda Passport turns Auto Idle Stop back on every time you start it, this inline memory harness solves that one problem: it remembers the last setting and restores it at the next ignition cycle. Coverage is the 2019–2023 Honda Passport. It plugs in line with the factory connector named in the instructions. Both ends are factory-style plugs, so nothing is cut or spliced.

You can still use the original button at any time. Whatever you select last is what the module repeats on the next start. Take the module out and the vehicle behaves exactly as it did from the factory.

Fitment

The fitment table for this SKU lists the following, each marked as a 100% fitment match:

• Honda Passport: 2019–2023

Trim is not listed separately. Any trim in these years with factory stop-start and the pictured connector is covered.

What the factory system does

Each start of the Honda Passport begins with Auto Idle Stop enabled. The switch on the dash can disable it, but only until the key is cycled. This module records the switch position and repeats it after the restart, which is the entire job it does.

Connecting it

It plugs in line with the factory connector named in the instructions. Both ends are factory-style plugs, so nothing is cut or spliced. Work with the ignition off. Seat each connector until its lock engages, then secure the module with the supplied ties or tape so it cannot rattle or touch pedals, steering parts or anything hot. Start the vehicle, press the stop-start button once, then restart to confirm the choice is held.

Why owners turn it off

Some owners only want stop-start off in certain seasons or on certain trips, such as towing a trailer or crawling through summer traffic with the A/C working hard. Because the module remembers whatever you chose last, it works both ways: leave the system off for a week, then switch it back on with the factory button and it stays on.

If stop-start is not engaging

Even with Auto Idle Stop enabled, the engine control logic only stops the engine when conditions allow it. Typical blockers are a low battery state of charge, an engine that has not reached operating temperature, heavy heating or A/C demand, steering input, an open door or unlatched seatbelt, and some drive modes. If the system never seems to stop the engine, one of these is usually the reason, and the module does not change that logic.

Keep the battery healthy

If the stop-start indicator shows the system as unavailable, test the battery before anything else. On stop-start vehicles that is the most common cause. A replacement should match the original specification (AGM or EFB), and some manufacturers call for a battery monitor reset after the swap.

What the module does and does not do

• It does not change engine power, transmission shifts, emissions calibration or fuel trims.
• It leaves the factory button working, so you can turn stop-start back on whenever you want.
• It does not write anything to the vehicle's modules, and removing it restores the stock default.
• It remembers the last stop-start setting through a key cycle.

Troubleshooting notes

If the setting is not remembered, check that the module was installed with the ignition off and that the connector clicked into place. Then press the factory button once, switch the vehicle off, close the doors, give the electronics time to shut down, and start again. If it still resets, contact support with the year, trim and a photo of the connector.

Confirm these points

• Model year and model match a row in the table above (2019–2023 Honda Passport).
• Your Honda Passport has the factory stop-start button. Base trims or engines without stop-start have nothing for the module to remember.
• The connector at your install point matches the one in the product photos.
• The battery and charging system test good and no warning lights are on.
• No aftermarket remote start, alarm or gateway bypass is wired into the same circuit. If one is, email support before ordering.
• If you are unsure, send your VIN to support@automotivebypass.com and we will confirm fitment.

Ordering details

Free standard shipping covers the contiguous US, with dispatch in 1–2 business days and 3–4 days on the road after that. You have 45 days to request a return (pre-approval required, 20% restocking fee, buyer-paid return shipping). The module is backed by a 3-year limited warranty. For order or fitment questions, write to support@automotivebypass.com between 9 and 5 Pacific, Monday through Friday.