2021 Honda Pilot: multiple warning lights

Filed Jun 26, 2026 · Electrical · NJ

This is the major safety issue while driving with my family on a highway. Keyless control unit is failing when car stops. While on a highway, all the lights on the dashboard start flickering, alarm went off brake system got locked. I need to pull over, stop the car and restart the car again. The flickering dashboard problem persisted the whole day and alarm went off intermittently till it drained the battery. Problem is reproducible.

Filed Jun 16, 2026 · Electrical · CT

The Multipurpose front camera just went out and a series of many warning lights came on in my Honda Pilot. The camera just stopped working for no reason, with no warning and never an issue before. I took my Honda Pilot to the Honda Dealership service department to have it checked and resolved. The dealers resolution was quoting me $2,000.00 just for the camera, with no labor or calibration, that is extra. They told me its a glitch in the Honda's system and that's probable why the camera stopped working. They told me they are not responsible for the camera and won't replace it. They showed no concern for safety and I had to pick up the vehicle if I did not replace, at my cost, the $2000.00 camera plus labor and calibration which may be around $3000.00 all told. I can't believe that if this is a known problem to Honda and Honda is aware of it in their system, why aren't they responsible to replace a faulty manufacturing problem. Honda is passing their problem to consumers at a cost of $2000.00 just for a camera. This should be unacceptable and it is outrageous the fact that Honda knows of a problem in their system that creates a safety problem and still are allowed to have the financial burden put on the consumer with no accountability. I had 2 other recalls on file and nothing was done. With the warning lights on, I am very concerned of the major safety issue. I don't believe, I as a consumer, should be responsible for the cost of a manufacturing issue. Now I have a vehicle with a safety issue and an extremely high cost resolution. I wanted to inform you because I believe that I am not the only person this has happened too and hopefully you can address this issue with Honda. Thank you.

Filed Jun 5, 2026 · Driver assistance · SC

My dash is lit up like a Christmas tree. The CMBS has a serious issue, every safety feature has been disabled. Please refer to the he provided picture.

Filed May 14, 2026 · Driver assistance, Electrical · 75,670 miles · MA

The contact owns a 2021 Honda Pilot. The contact stated that while driving at an undisclosed speed, the vehicle's rear brakes rub significantly to the point of prematurely wearing out the brake pads. Additionally, the instrument panel is failing and displaying all warning lights, and the side mirrors flicker while driving. The vehicle was taken to a local dealer where it was diagnosed to be the federal safety agency Campaign Number: 20V439000 (BACK OVER PREVENTION, ELECTRICAL SYSTEM) however, the VIN was not included in the recall repair. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 75,670.

Filed Jan 2, 2026 · Engine · OH

While driving the check engine light started flashing and lost a lot of power. Pulled over and turned the car off. Turned the car back on and the light was gone and power seemed to be back. Trying to get home about 15 minutes later every light came on. Lane assist, check engine, blind spot, traction control, literally all warning lights. When these came on the car lost all power within a minute. Wouldn't turn over or even power on to use lights or the radio. Got the car towed to two separate garages both stating engine failure. Honda dealer provided documentation of a bearing failure which damaged cylinder 5.

Filed Oct 25, 2025 · Engine · IL

While stopped at a traffic light the “Auto Stop” engine shut off feature engaged. When releasing the brake, the vehicle completely shut down, all dash lights came on as did the transmission mode lights. Upon trying to restart with the start button, prompts came up to place the vehicle in park. Trans select button did not work. Pressed the Start button several more times. At one time all dash lights went off, except for the battery light. Brake pedal went all the way down to the floor. Opened the drivers door and then tried the start button one more time with the AutoStart button switched off after dash lights returned. Vehicle started after that. Blocked traffic for one traffic light sequence. Occurred on Route 30 and Schoolhouse Road; New Lenox IL on 10/25/25. Attempted to restart several times afterward and vehicle restarted. Trying to drive with “autostart” feature manually turned off from now on, if I remember. Scheduled checkup @ dealer 10/29/25. Honda of Joliet Vehicle has slightly over 40k miles.

Filed Aug 28, 2025 · Electrical · MD

My 2021 Honda Pilot SE has developed a failure of the forward-facing Multipurpose Camera Unit (mounted behind the rearview mirror). A scan with a professional tool confirmed Diagnostic Trouble Code U3000-49 – “Multipurpose Camera Unit Internal Electronic Failure.” When this occurs, the vehicle immediately displays multiple warning lights at every startup: Collision Mitigation Braking System (CMBS), Lane Keeping Assist (LKAS), Road Departure Mitigation (RDM), Adaptive Cruise Control (ACC), and Automatic High-Beam/Dimming headlights. In addition, the dashboard shows a “brake system failure” message, although the brakes continue to function normally. This single camera failure disables all of Honda’s Honda Sensing crash-avoidance features, leaving the driver without forward collision prevention or lane-keeping systems. The failure is persistent, and the DTC remains “Current” after clearing. I took the vehicle to a Honda dealer, but because the car is out of warranty they refused to perform diagnosis or provide a repair estimate, essentially telling me it was my responsibility to resolve. This problem is widely reported by owners of Pilots, Odysseys, CR-Vs, Accords, and Passports, all showing the same U3000-49 code and symptoms. Independent shops confirm they often see these failures, and forums show repeated cases of owners paying high out-of-pocket costs, sometimes with parts on back-order. Honda has recalled less serious issues, such as rearview camera display faults, while this defect disables forward collision prevention and lane safety systems—far more critical to protection. Other automakers (Toyota, GM, Subaru) have recalled forward cameras and radar modules under similar conditions. This is a major safety defect that removes federally promoted crash-avoidance systems with no fallback. I urge the federal safety agency to investigate and require Honda to issue a recall at manufacturer expense, and please advise how long the process may take, as my vehicle is less safe to drive

Filed Aug 19, 2025 · Brakes, Driver assistance · TX

I purchased my vehicle approximately 8 months ago, and recently all of the warning lights on my dashboard began coming on randomly while driving. I immediately brought the vehicle back to the dealership where I purchased it. At that visit, I was told the cause was unknown and that it might possibly be related to the battery. Unsatisfied with that explanation, I took the car to a second authorized dealership for another opinion. After inspection, I was advised that there was nothing wrong with the battery and no clear cause was identified for the warning lights. Despite taking the car to two dealerships, I have received no resolution or effective support. The issue remains ongoing, and I am now left uncertain about the reliability of my vehicle. Warning lights are designed to alert drivers to serious problems, and when they come on without explanation, it creates a very real safety concern. I do not know if my car is safe to drive. My concern is heightened by the fact that I have since learned this vehicle model has been subject to a recall in the past for the same issue. This raises the possibility that my car may be experiencing a known defect that was not properly resolved. As a consumer and driver, I should not be left to guess about the safety of my vehicle, especially when a documented recall exists. I am formally requesting immediate assistance: a complete inspection by a qualified technician, confirmation of whether my car is covered by any recall, and repair of the defect at no cost if it is recall-related. I also request written documentation of findings and assurance that my vehicle is safe to operate. At this point, I feel I have not been provided with adequate support or resolution. I am extremely concerned for my safety and believe this matter requires urgent attention.

Filed May 3, 2025 · Electrical, Engine · OH

Vehicle when trying to start locks up, have had the battery alternator starter checked, changed the brake switch and still having issues with hard start to my 2021 Honda Pilot. When this happens all the lights come on. I push the Idle/Start switch when I do get it started so that it does shut off when I’m at a red light or stop sign. Because I’m afraid it will not start. Dealership could not find any issues with the vehicle, I’ve taken it to another mechanic and they could not. It has been put on diagnostics several times. I keep putting money into trying to find out what the issue is!!!

Filed Jan 30, 2025 · Electrical, Engine · AR

I have had numerous issues with the car stalling while in idle- it will shut off but still display all the warning lights on the dash. It would require the car engine to be restarted. Has happened at stop signs, stop lights, carpool lights. This has happened at least 10 times over 3.5 years. Last week I had a similar issue but this time it was much scarier- it did that same shut off but completely shut off the engine. All systems were black and the start button did not trigger a response for at least a minute. Once it finally restarted it displayed a “lost power” message on the screen. More similar issues to report.

Filed Oct 5, 2024 · Driver assistance · CA

Normal driving of vehicle when suddenly several warning lights began to appear and show up every time when driving (LKAS, ACC, Mitigation, etc) despite these features working. Honda dealership claims it is due to a faulty front camera. Safety at risk because if these systems do fail, there will be no way of indicating.

Filed Oct 1, 2021 · Electrical · 1,000 miles · NY

The contact owns a 2021 Honda Pilot. The contact stated while driving 30 MPH, he noticed that several warning lights illuminated and remained illuminated. The contact continued driving to his residence. The following day the warning lights disappeared. Several months later the failure recurred. The contact took the vehicle to the local dealer to be diagnosed. The mechanic related the failure to an unknown electrical failure and performed a software update to fix the vehicle. the contact stated that the failure recurred. The vehicle was taken back to the dealer but was not diagnosed. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 1,000.