Automatic Transmission Control Module problems of the 2018 Honda Accord

Intermittently, the vehicle has a very violent shift at low speed (under 20 miles per hour). In the past, this had been mentioned to the dealer, numerous times, who claimed that the issue is not reproducible. However, during the visit on 12/06/2022, dealer mechanic(s) claimed that they did witness the issue and performed the following (per dealer's notes): "reset tcm and batter cable reset. " after which (the dealer notes state): "let the customer know that the trans will adapt to driving habits within 200 miles. If the customer drives hard, the transmission will learn hard to shift hard etc. . . " the second statement is nonsensical, since, most of the time the transmission shifts relatively fine, regardless of the driving pattern (I. E. Hard, mellow, etc. ) and the issue happens intermittently (every so many hundreds miles driven), at very low speeds with very little accelerator input, which indicates more of a software issue (and, possibly a mechanical design defect, coupled with the sw issue). . Read more...

The vehicle had a very violent shift (perhaps it was turbo lag related?) at low speed (under 20 miles per hour - typically, this happens in a parking lot or the like as you slowly drive away). In the past, this had been mentioned to the dealer, numerous times, who claimed that the issue is not reproducible. However, during the visit on 12/06/2022, dealer mechanic(s) claimed that they did witness the issue and the fix the performed the following (per dealer's notes): "reset tcm and batter cable reset. " after which (the dealer notes state): "let the customer know that the trans will adapt to driving habits within 200 miles. If the customer drives hard, the transmission will learn hard to shift hard etc. . . " the second statement is nonsensical, since, most of the time the transmission shifts relatively fine, regardless of the driving pattern (I. E. Hard, mellow, etc. ) and the issue happens intermittently (every so many hundreds miles driven), at very low speeds with very little accelerator input, which indicates more of a software issue (and, possibly a mechanical design defect, coupled with the sw issue). Again, Honda has refused to properly troubleshoot and address the issue. . Read more...

The vehicle had a very violent shift (perhaps it was turbo lag related?) at low speed (under 20 miles per hour - typically, this happens in a parking lot or the like as you slowly drive away). In the past, this had been mentioned to the dealer, numerous times, who claimed that the issue is not reproducible. However, during the visit on 12/06/2022, dealer mechanic(s) claimed that they did witness the issue and the fix the performed the following (per dealer's notes): "reset tcm and batter cable reset. " after which (the dealer notes state): "let the customer know that the trans will adapt to driving habits within 200 miles. If the customer drives hard, the transmission will learn hard to shift hard etc. . . " the second statement is nonsensical, since, most of the time the transmission shifts relatively fine, regardless of the driving pattern (I. E. Hard, mellow, etc. ) and the issue happens intermittently (every so many hundreds miles driven), at very low speeds with very little accelerator input, which indicates more of a software issue (and, possibly a mechanical design defect, coupled with the sw issue). Again, Honda has refused to properly troubleshoot and address the issue. . Read more...

The vehicle had a very violent shift (perhaps it was turbo lag related?) at low speed (under 20 miles per hour - typically, this happens in a parking lot or the like as you slowly drive away). In the past, this had been mentioned to the dealer, numerous times, who claimed that the issue is not reproducible. However, during the visit on 12/06/2022, dealer mechanic(s) claimed that they did witness the issue and the fix the performed the following (per dealer's notes): "reset tcm and batter cable reset. " after which (the dealer notes state): "let the customer know that the trans will adapt to driving habits within 200 miles. If the customer drives hard, the transmission will learn hard to shift hard etc. . . " the second statement is nonsensical, since, most of the time the transmission shifts relatively fine, regardless of the driving pattern (I. E. Hard, mellow, etc. ) and the issue happens intermittently (every so many hundreds miles driven), at very low speeds with very little accelerator input, which indicates more of a software issue (and, possibly a mechanical design defect, coupled with the sw issue). Again, Honda has refused to properly troubleshoot and address the issue. . Read more...

My vehicle is a 2018 Honda Accord hybrid with 12,075 miles on the odometer. I was driving to work in the morning of 09/22/2021. The condition was dry and the outside temperature was around 60 degrees. I was merging onto the interstate in sport mode when all-of-the-sudden my car went into a limp mode. The check engine light began flashing and car lost 90% of its power. The engine made a knocking noise and began to shudder violently. I tried to switch it out of sport mode to get it back into eco but the message displayed on the dash said something like "unavailable at this time. " I was about a mile and a half away from work and was able to creep along the road to make it there as it was losing more and more power. When I got to work (with the engine still running) I lifted the hood and the engine was still shaking hard. I scheduled an appointment with the local dealership to have it looked at that afternoon at 2:00 pm. When I drove it to the dealership 3 miles away, the check engine light was no longer flashing and the engine seemed to run fine. When I called the service advisor later that afternoon to check the status of my car he told me, "the technician drove the car around with the scan tool plugged into it and it drove fine. He wasn't able to pull any codes from the pcm. " I find it to be odd. In my experience, whenever the cel illuminates, a malfunction code will be stored in the pcm until it is cleared. Why would Honda program the pcm to reset and hide the malfunction code so that we're not able to diagnose the issue? I did take the car into the dealership earlier this year to get a warranty battery replacement and to perform 2 recalls (one was an emission recall and the other was for the bcm).