2021 Honda Pilot engine problems

“On four occasions, my 2021 Honda Pilot SE AWD (VIN [XXX]) has shut off at a stop under the Auto Idle Stop system and then failed to restart, leaving the driver stranded. The incidents happened on XXX, XXX, XXX, and XXX in and around [XXX]. Component: The starter system and the Auto Idle Stop engine restart function. Honda has acknowledged this exact condition in Service Bulletin 23-009 and Warranty Extension 23-009/23-010 (“Engine Does Not Auto Restart After Entering Auto Idle Stop”). The listed remedy is a software update, a valve adjustment, and replacement of the starter assembly and starter relays. The vehicle and the original starter are available for inspection on request. Safety risk: The engine shuts off at stops as designed, then will not restart. The vehicle is left disabled at intersections and in traffic with no warning, which puts the driver and passengers at risk of being rear-ended and stranded. My wife has been stranded four times. Idle Stop turns itself back on every time the car is started, so the driver’s only protection is remembering to switch it off manually on every trip. The fourth failure happened when she forgot. Dealer confirmation:…”

“While stopped at red light or stop sign the car goes into engine auto off mode when the brake is pressed. When then trying to go, the car is turning off or going to neutral. This causes vehicles behind me to stop suddenly and can cause an accident. The only way to then go is to turn the vehicle off, and restart, then put back in drive. This is happening very frequently and again is a safety hazard for me and others.”

“The auto idle stop feature will turn my engine off like it's supposed to, but then my engine dies when I try to accelerate again. This is happening more and more. I would allow my car to be inspected. My car tried to roll backward into the car behind me today, and I have held up traffic each time this has happened. I have seen on chatrooms that other honda pilots have this problem. No one has inspected my vehicle. This time my car went into neutral and flashed an alert that my car was now in neutral.”

“To Whom It May Concern: I am requesting immediate escalation of a serious safety concern involving my 2021 Honda Pilot Touring, which I purchased as a Honda Certified Pre-Owned vehicle directly from Tempe Honda. I also purchased additional warranty coverage at the time of sale. I have owned this vehicle for less than two years, and it has already required service for an issue involving the automatic idle-stop system. That issue remains unresolved. More recently, the vehicle has begun unexpectedly shifting into neutral without any action on my part. This has occurred on multiple occasions, including when transitioning from reverse into drive and, most alarmingly, while attempting to accelerate from a complete stop at a traffic light. During these incidents, the neutral indicator actually illuminates on the dashboard. This is not simply an inconvenience or a minor performance concern. It is a potentially dangerous malfunction that places me, my passengers, and other motorists at risk. I am particularly concerned because I am a single mother who relies on this vehicle for daily transportation, including transporting my child.”

“My vehicle's auto idle engine stops when brake is engaged, goes into neutral when released instead of restarting causing me to have to turn on the flashers, shift into park, turn off the ignition then restart. I was almost rear ended at an intersection & held up traffic during another occurrence, causing impatience behind me. I then found numerous complaints on the same by Honda owners & extended 10-year warranty via service bulletins 23-008 & 23-009. I brought my vehicle into the dealership to be diagnosed on 9/29/26, & they said it needed the referenced valve adjustment & performed it. A few days later, on 10/4/26, it happened again in a grocery store parking lot as I stopped for a vehicle pulling out of space. I called the next morning & made the appt to have the starter diagnosed later in the week. Later that day, it happened again at a red light. I brought it back to the dealership on 10/9/26 & advisor called a few hours later to say said the starter was pulling too much power & causing the problem & needed replacement, but did not have it in stock, with no expected date, but would contact me as soon as they received it. About an hour later, he called back…”

“Idle auto stop / start - this has repeatedly failed at traffic lights. Vehicle stops dead and will not restart. Taken to 3 dealers over the course of 18 months and finally the 3rd Honda dealership acknowledged this. The problem has been identified and repeated by dealership mechanics. No warning lights at all.”