2025 TRD OffRoad - truck still thinks the trailer is plugged in after towing

[OGBugsy]

I towed my converted cargo trailer out camping A few weekends ago. Added the trailer in the truck and selected it. Plugged it into the truck and used tow/haul mode while driving. Everything went fine. That night I unplugged the trailer and ran into town to get us dinner. Right after starting the truck I got an error saying that a few systems were unavailable, to see the owners manual, the trailer was still detected and trailer driving assist was active. Once I started driving, a different error came up saying “trailer not detected please confirm yes or no”. I confirmed no and went and got dinner.

after that, every time I started and drove the truck, it did exactly the same thing. Even after hooking the trailer back up and towing it home. After I got home and unhooked the trailer. It was still doing the same thing so I deleted the trailer and boat that I had stored in the trucks trailer settings and still no luck.

I took it to Toyota and they first changed a break solenoid under the dash. That didn’t fix it so they said they needed to change the brake manifold and it would take 5 days to get the part. The next day they called and said it was fixed. That an engineer told them to unplug the battery for three hours, reinstall the original break solenoid and that was it. They told me to disconnect it in the truck settings next time before unplugging it from the truck. The r & r of the break solenoid was not on my paperwork and they left 2 of the 3 seat fasteners on the back floor (hybrid truck).

fast forward to today. I took my boat in for a service and I did exactly what they told me as far as the order of disconnecting and unplugging, and right away the truck is doing the same thing every time I started driving and drive the truck. It thinks the trailer is still connected and wants me to confirm yes or no.

Has anyone else had any issues with this? Any help would be greatly appreciated. See attached pictures for the errors I am getting.

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[Sagebrush]

Right after starting the truck I got an error saying that a few systems were unavailable, to see the owners manual, the trailer was still detected and trailer driving assist was active. Once I started driving, a different error came up saying “trailer not detected please confirm yes or no”. I confirmed no and went and got dinner.

So, the first note was telling you that certain features aren't available while towing, such as Lane Assist. That's not an error.

When it asked you, "Trailer not Detected, Please Confirm Yes or No." You missed that test. The answer is Yes.

 

[OGBugsy]

So, the first note was telling you that certain features aren't available while towing, such as Lane Assist. That's not an error.

When it asked you, "Trailer not Detected, Please Confirm Yes or No." You missed that test. The answer is Yes.

I tried selecting yes several times and no as well. It just keeps coming back every time I start the truck. If the features aren’t available with no trailer selected or attached to the truck…then yes, there is an error. Your sarcasm isn’t helpful.

 

[TxGlenn]

This is the same symptom I was having in my 2024 that was supposedly fixed with TSB 25TC07. I just got the recall work performed this week and haven't hooked up a trailer yet so can't definitively say if it fixed it, but you may want to take a look at that.

 

[Great White North]

I towed my converted cargo trailer out camping A few weekends ago. Added the trailer in the truck and selected it. Plugged it into the truck and used tow/haul mode while driving. Everything went fine. That night I unplugged the trailer and ran into town to get us dinner. Right after starting the truck I got an error saying that a few systems were unavailable, to see the owners manual, the trailer was still detected and trailer driving assist was active. Once I started driving, a different error came up saying “trailer not detected please confirm yes or no”. I confirmed no and went and got dinner.

after that, every time I started and drove the truck, it did exactly the same thing. Even after hooking the trailer back up and towing it home. After I got home and unhooked the trailer. It was still doing the same thing so I deleted the trailer and boat that I had stored in the trucks trailer settings and still no luck.

I took it to Toyota and they first changed a break solenoid under the dash. That didn’t fix it so they said they needed to change the brake manifold and it would take 5 days to get the part. The next day they called and said it was fixed. That an engineer told them to unplug the battery for three hours, reinstall the original break solenoid and that was it. They told me to disconnect it in the truck settings next time before unplugging it from the truck. The r & r of the break solenoid was not on my paperwork and they left 2 of the 3 seat fasteners on the back floor (hybrid truck).

fast forward to today. I took my boat in for a service and I did exactly what they told me as far as the order of disconnecting and unplugging, and right away the truck is doing the same thing every time I started driving and drive the truck. It thinks the trailer is still connected and wants me to confirm yes or no.

Has anyone else had any issues with this? Any help would be greatly appreciated. See attached pictures for the errors I am getting.

I have a 2024 TRD Off-Road premium Tacoma. I experienced the same symptoms while pulling my boat last week. Once I disconnected the boat trailer, I was still getting prompted whether or not a trailer was detected. I ended up removing the trailer hitch and the trailer prompts stopped. My rationale for removing the hitch was based on the idea that the trailer prompts were coming from the rear camera detecting the hitch. A couple of weeks before these trailer prompts, I took the truck in to complete a rear camera programming recall. I will put the hitch back on and see if the trailer prompts start again. I hope this helps.

 

[SpicyTaco]

Same thing on my 2024 TRD Pro! So frustrating. It continued to happen for over 1000 miles, then suddenly corrected itself. I have towed a trailer since then and it functioned properly. No recall performed yet. I don't have any answers for this.

 

[Sagebrush]

Your sarcasm isn’t helpful.

It isn't sarcasm. You said you selected No as your answer, and that's not the correct answer. I was trying to be helpful. Excuse me.

 

[rybern]

So, the first note was telling you that certain features aren't available while towing, such as Lane Assist. That's not an error.

When it asked you, "Trailer not Detected, Please Confirm Yes or No." You missed that test. The answer is Yes.

I do find the wording confusing. It seems it might could/should be "No, the trailer isn't connected."

 

[Sagebrush]

I do find the wording confusing. It seems it might should be "No, the trailer isn't connected."

I agree. I'm guessing the mother language is Japanese.

 

[OGBugsy]

Took the hitch out and the issue went away after the first start. Problem solved!!

Tyvm everyone for the input!! And Tyvm Great White North!! I never would have thought of it without your reply. Hopefully it’s something they will fix in the future. Let me know if yours is fixed after the work they did please.

 

[just_rich_young]

Same thing happened to me. I turned the gain back down to zero on the trailer brake controller and it never happened again. My hitch is still in.

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