2021 Honda Ridgeline: start-stop system problems

5 of the 103 complaints about the 2021 Honda Ridgeline describe start-stop system problems.

owner complaints: 5
of this car's complaints: 5%
recalls: 0

Is there a fix? 7 service bulletins cover this area of the car. See below

Start-stop system problems by model year

2025
15
2024
10
2023
1
2022
4
2021
5
2020
10
2017
2
2006
1

What owners say

Filed May 9, 2025 · Engine · 50,000 miles · KY

The contact owns a 2021 Honda Ridgeline. The contact stated that while at a stoplight, the Auto START/STOP feature malfunctioned, and after releasing the brake pedal, the engine failed to automatically restart as designed. After shifting back to park(P), the vehicle restarted and operated as normal. The cause of the failure was not yet been determined. The local dealer was notified of the failure. The manufacturer was not yet contacted. The contact was informed of the federal safety agency Action Number: EA25004 (ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the investigation. The failure mileage was 50,500. The VIN was not available.

Filed Apr 6, 2025 · Engine · MA

2021 Honda Ridgeline Sport with 60,000 miles and no other issues. Engine failed to restart after the "auto stop/start" kicked in, all the lights on the dashboard went off and then turned off. After 1 minute, I was able to get the car started again, this happened on 3 different occasions over a 4 week period. Got the car tested and the starter was bad. Contacted Honda, they said too bad, no issues with the starter. I got the starter replaced for $800 and now the federal safety agency is investigating the issue Honda said was not an issue.

Filed Oct 29, 2024 · Electrical, Engine · OH

My car is equipe with a idle stop start assitant and in 3 ocasions did not restar the vehicle after stoping on a red light, I have to put the car in parking and then try to re-start the vehicle triying 1 or 2 time until starts up.

Filed Dec 27, 2023 · Engine · OH

I took my vehicle in to the dealer on 1/31/2023 to address recall 23-008 (Idle stop/start switch update). I had not had any problems with it , but I had them inspect it. They performed Bulletin 23-008, PGM-FI update. On 2/16/2023, after stopping at a stoplight, the engine shut down but it didn’t start back up when I tried to proceed. A message came up on the dash saying to put the vehicle in park and press the start button. I did that and the car started. I stopped at the dealer and told them what had happened and they performed bulletin 1103A8 Warrany Extension Campaign: Adjust Valves. I haven’t had the problem reoccur, but I keep getting an intermittent message on the dash, “Auto Engine Idle Stop Unavailable “. I’ve had the vehicle back in to the dealer numerous times about the message and they tell me that they could not duplicate, or they give me a list of things that could cause the message, but none of them apply. I believe it was something that they did in the two bulletins that is causing the message to come up on the dash

Filed Dec 13, 2022 · Electrical, Engine · NH

The auto start/stop function fails to restart the truck after stopping. I has in the middle of an intersection waiting to turn left. The auto stop turned off the engine. When I let go of the brake the truck failed to restart. I was stuck in the middle of the intersection when other cars were trying to get around me because the traffic lights changed. I couldn’t restart the truck at first. Had to put it in Park; push the brake down; hit the start button and then the truck finally started. Then had to put it back in Drive. But I was still in danger of getting hit, because it wasn’t my turn to go due to the traffic lights. I’m still under the bumper to bumper warranty and I take the truck to dealership tomorrow. The dashboard reads, “Auto Engine Idle Stop System Problem”