2020 Honda Odyssey: check engine light

Filed Oct 14, 2026 · Transmission · 55,000 miles · CA

The contact owns a 2020 Honda Odyssey. The contact stated that while coming to a stop, the vehicle independently shifted into Park (P). The contact stated that the check engine warning light initially illuminated before the vehicle automatically shifted into Park (P); however, the failure escalated, with the vehicle shifting into Park (P) and shutting off the engine entirely without warning light illumination. The vehicle was able to be restarted following the failure. Additionally, the collision warning light illuminated on the instrument panel, with no vehicles nearby. The vehicle was taken to a dealer. The failure mileage was 55,000.

Filed Aug 19, 2026 · Engine · CT

The engine auto idle system failed at a stoplight. The auto-idle engaged, but when I took my foot off the brake, the engine did not restart. It completely shut down, putting my car in park in a busy intersection. The engine light and an error message flashed briefly but disappeared. I was able to restart the car and drive, however, only after waving several other cars to pass by me. I've noticed recently the restart function lagging, and if I put my foot on the gas too soon, the car lurching and jerking forward (indicating the engine isn't restarting quickly or properly). I recently had a full routine service on the vehicle, indicating battery life is good. No other issues appeared such as overheating.

Filed Apr 5, 2026 · Driver assistance · WV

My vehicle started cycling between all of the check engine types of lights to include the emissions system. When taking it to my local Honda dealership, they determined that it was my front camera (multi-purpose camera internal failure). After some research and speaking to the service department, this major safety failure has been happening to many other Honda vehicles. The emissions system failure seems to also be a faulty design. I feel that the camera system failure could have resulted in an accident or major injury. And of no fault of my own. My vehicle is regularly maintained and is merely 6 years old. I should not be replacing a mayor system like the front camera every 6 years.

Filed Jan 6, 2026 · Acceleration, Electrical · TX

Upon starting the vehicle, it failed to engage in reverse. Although the backup camera activated, the vehicle remained stationary. After multiple ignition cycles, the vehicle eventually engaged in reverse and then moved forward in Drive. However, shortly after, the vehicle experienced a sudden loss of power and entered "limp mode," restricting speed to approximately 15–20 mph regardless of throttle input. The engine revved excessively high without corresponding acceleration, and a severe burning/heat smell emanated from the transmission/engine compartment. This failure occurred without any prior warning; notably, no dashboard warning lights or "Check Engine" indicators illuminated to alert the driver of a mechanical or electronic fault. The sudden, un-signaled drop in speed on a public roadway created a significant safety hazard for following traffic and risked a rear-end collision. The vehicle was towed to a certified Honda dealership where the Transmission Control Module (TCM) was diagnosed as failed. The TCM is currently being replaced under the Honda Certified Pre-Owned (CPO) warranty. We do not know what else requires replacement and repairs. The dealership will not cover the replacement of the transmission fluid, or engine fluid, despite the fluid being subjected to extreme heat and potential damage during the failure and subsequent limp mode.

Filed Jul 21, 2025 · Engine · NY

High pressure Fuel pump makes Loud noice. Fuel line vibrates. Check engine light on, Shows error code Low fuel pressue.

Filed Oct 28, 2024 · Engine · LA

I was driving with cruise control on and a car pulled in front of me and hit the brakes. My car reacted by hitting the brakes hard and the engine tried to recover but hiccupped and lost power and engine light flashed at me. I pulled over and when I started the car again there was a rattle that would get faster if i pressed the throttle. I was able to get back on the road and the throttle rattle was still there and now it started saying engine oil low. I pulled over, checked dipstick and it was fine. Engine oil low light continued to flash, so I went to a oil change place to have them look and change the oil and they reported nothing wrong. I left and continued driving and the rattle noise was still there, engine oil low was still there. Then i heart a loud pop and griding noise, lost all power and had to pull over. This time the car was dead. I had it towed to a mechanic who said had to be an internal defect in the engine from the factory.

Filed Oct 23, 2023 · Transmission · PA

My wife was driving our honda odyssey on a state highway and it began lurching and drastically reduced speed while in 65 mph traffic. The vehicle almost created a large accident as it uncontrollably and suddenly reduced gears and instantly slowed well below the rate of travel of the vehicles on the road. She managed to pull over on the side of the road but was unable to move the vehicle . There was never a check engine indicator or any other warning signs prior to this happening. The vehicle was towed to the local honda dealership in Scranton PA. Today the service center there stated that the transmission fluid was charred and burnt up gears in the transmission. This is a huge safety concern as there was no warning signs of the issue until the vehicle rapidly and suddenly shifted down gears and slowed to almost a complete stop along the highway. The vehicle is only 3 years old and is 900 miles over the powertrain warranty. Has there been a check engine light or any indicator we could have had the problem addressed before it became catastrophic and put my families lives in jeopardy. The vehicle has been regularly maintained

Filed Feb 7, 2022 · Transmission · CA

Just experienced a serious issue with our 2020 Odyssey Elite with 24,000 miles on it. Jerked forward from a stop and then would not advance beyond 1st gear. Multiple warning lights came on: check engine/ emissions/ back up camera and sensors. Dealer reported there was an electronic defect that destroyed the transmission which they claim caused the transmission to attempt to shift into two gears simultaneously. Not sure but the jerking motion may indicate that the transmission shifted into park while moving. Dealer refused to provide a loaner car and now waiting for a transmission replacement on a $50K vehicle with 24,000 miles on it. Multiple similar transmission replacements on 2020 Honda Odyssey are reported on the Odyssey Owners Forum. Had this event occurred on a higher speed or congested area a serious accident could have occurred as vehicle could not accelerate and jerked violently initially immediately followed by inability to shift to higher gears.