2018 Honda Odyssey Electrical System Problems

Multiple times of driving the vehicle as I am trying to press the gas pedal while driving it acts like it is not working and suddenly it stutters and stalls. The car will shut off and put you into to neutral while you try and pull over to the side of the road without being hit. It happens randomly and without rhyme or reason. After it shuts off codes are thrown such as brake failure, emissions failure, hill assist failure, steering failure, and lane assist failure. The car will be really hard to restart and if eventually will and then everything will disappear and go back to normal. Codes leave and car drives fine until it messes up again. First time it happened was months ago from this report, and then it happened monthly, weekly and now almost daily but only when you try and drive. Very unsafe and there’s no reason cars should stall at high speeds going down interstates!

I have a 2018 odyssey EXL I been getting messages from right sliding door problem and during the drive after 12 or 13 miles was getting sign was saying stop the vehicle and door sign is keep flushing saying right sliding door problem

Power Tailgate Failure/Dead Battery from Body Leak. currently power tailgate is not functioning.

Tailgate door is not functioning. Tailgate problem message on dash. Cannot open door with remote nor manually.

Rear hatch power door issue indicated on dash display, and complete failure of powered door feature. Investigation finds many other drivers of this make/model/year have issues with faulty seals allowing water intrusion into circuitry in left rear panel where the power lift fat control unit box is, causing damage to the circuitry. Other drivers have described more widespread electrical issues, some even causing the gate to unlatch while the vehicle is in motion. Upon inspection of my personal vehicle, signs of water damage were found both in the base of the area covered by the panel and within the circuit box and panel itself, confirming these suspicions.

2018 Honda Odyssey rear tailgate problems, What was the issue? Problem is because water is leaking from the roof rails onto the tailgate module, causing the power liftgate control unit to short circuit, leading to unintended opening/closing or complete failure.I checked every fuse and my tail gate still wont open! tailgate module failed due to leak on the roof rail. The "holes" are three very small spots that the weld didn't cover.......

Upon further investigation, LOTS of 2018 Honda Odysseys are experiencing the same problem I am. There is a leak coming in from the top of the van in the rear that causes water to leak through and overtime damages the control unit in the back. Damage to this causes my power lift gate to completely stop working, my passenger drive door to stop working, and a bunch of features like the front collision warning, the lane departure, sensors, fog lights, so on to fail and go on and off. I had problems here and there with it but it wasn’t until it rained 4 days straight that I made the connection with the leak and started trying to figure out the problem. I took it to the Honda Dealership to get diagnosed and they confirmed this problem. We have not been in any accidents to cause body damage to the vehicle.

The vehicle previously received a manufacturer dash wiring recall repair. After the recall repair was completed, the vehicle began experiencing intermittent and cascading electrical and communication failures across multiple integrated systems. Affected systems include Apple CarPlay, the DVD system, in-vehicle camera systems, CabinWatch, and repeated “MOST network unavailable” error messages. These failures occur intermittently and result in multiple systems disabling simultaneously. The vehicle was inspected by a Honda dealership, which confirmed the issue involves wiring within the dash harness. The dealership stated the affected wiring is not sold or serviceable separately and that correction would require replacement of the entire dash harness, but that this portion of the harness is not included in the original recall coverage. Because these systems share common power and communication pathways, failures cascade across multiple modules. When the camera system fails, rear view camera functionality and related warnings are unavailable while backing up, reducing the driver’s ability to detect obstacles, pedestrians, or children behind the vehicle. When CabinWatch is unavailable, the driver is unable to visually monitor children seated in the rear rows while driving, which affects situational awareness and the ability to respond quickly to unsafe conditions inside the vehicle. These failures also impact driver information systems and create intermittent loss of critical visual feedback, increasing driver distraction as systems drop out unexpectedly while the vehicle is in operation. The condition began after the recall repair and appears to be related to or a continuation of the original recall defect. The vehicle remains available for inspection, and the condition has been confirmed by a manufacturer-authorized dealer.

Defective body seam on roof panel over drivers side rear wheel - resulting water leak on control panel for power liftgate caused the rear tailgate to continually open and close while driving. The vehicle was parked and the fuses controlling the tailgate were removed to enable the closure of the hatch and allow vehicle operation. Prior to this, the vehicle battery died while parked due to the continuous tailgate operation and required a battery jump. The vehicle was taken to D&J Auto (an independent service center) where a previous liftgate control panel was replaced for failure to open the tailgate. A search of the internet on 2018 Honda Odyessey liftgate problems revealed multiple instances of water leaks on the liftgate control panels due to body seam issues which caused liftgate failures. This information was relayed to the auto repair shop where the leak was discovered. The vehicle was taken to a body repair shop across the street where the seam was fixed, returned to the auto repair shop where a third tailgate control panel installed.

Vehicle experiences engine stalling and failure to restart at intersections when the Auto Idle Stop (AIS) feature is engaged. This creates an immediate life-safety hazard as the vehicle becomes non-functional in live traffic. This has occurred 2 times. Once on surface streets and once on the highway in stop-and-go traffic. This issue persists despite Service Bulletins 23-008 and 23-009. Honda Corporate and Honda Dealership refusing to cover the repair. Separately, during a 37-day repair attempt (Jan 22 – March 2, 2026), AutoNation Honda Chandler admitted the vehicle was sold with an 'incorrect' battery type (Lead Acid instead of required AGM), which caused electrical instability. The dealership attempted a repair on Feb 13, but the vehicle failed to start again on Feb 11 during a pickup attempt. The dealer has since refused to provide accurate service records or further communication. The vehicle remains unsafe to drive as it continues to stall randomly.

Since I own this vehicle, 3 times tailgate failed. I have done repair it twice in Honda dealership at Paramus NJ. Now it happened again after a year of last fix. Instrument cluster = Warning sign appears stays there. Somewhere on back = Constantly sound beeping - When driving Tailgate = Does not open and if open some how, it does not close. Neither automatic nor manually. I have to drive vehicle since I have no choice. I inspected all fuse in front under hood and in rear at cargo area.

The Infotainment Display has been malfunctioning. The display goes black and the back-up camera is not available. On the night of December 12, 2025, we were driving the car on the highway and the screen flickered in and out and then went black and so did the dashboard display. This was very scary as the entire car went dark and we were driving blindly on the highway. It appears that all 2018 Honda Odysseys have a recall for the Infotainment electrical system except for the Elite model that we purchased. I called the dealer last week and was told no recall available and we will need to pay the $179 diagnostic fee plus the cost to repair which will be significant. We will take the car in this week as the car cannot be driven safely without full dashboard and backup camera display.

The Tailgate Control Module failed due to water getting in to it from normal rain. There seems to be a leak in the seam and caused the failure. I took it to the shop and confirmed the failure, purchased a new control module and replaced the faulty one. I opened up the faulty one and it had water damage inside.

The front facing camera has stopped working. Anytime we turn the vehicle on we get multiple warning lights (lane assist, cruise control, bright lights, braking, etc) aren't working.

My computer screen that has my radio and backup camera will black out randomly while I’m driving. There are times I can’t use it for a backup camera because it won’t cut on. I’m not able to control my heat and a/c when it goes blank too.

The roof leaks in the LH rear of the van under the roof strip thru a bolt or bad seam rfom a bad build causing the Power Unit Liftgate Module PN - 74970-THR-A11 to get wet and sit in water causing a short to the battery, The sliding doors to fail and the rear liftgate to fail which is a safety hazard if someone cannot exit the vehicle in an emergency. It is also a fire potential. This should be a safety recall at Hondas expense. The world wide web is flooded with videos and forums pertaining to this exact issue and Honda has not stepped up to the plate and addressed this issue.

The media touch screen display periodically goes blank and reboots during driving, which affects the backup camera, defrost control, and every other component controlled on the touchscreen display.

The contact owns a 2018 Honda Odyssey. The contact stated that while attempting to start the vehicle, several unknown warning lights illuminated. An independent mechanic was contacted. The vehicle was taken to the independent mechanic where it was diagnosed and determined that the windshield camera sensor had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 60,000.

FAILED MONOCULAR CAMERA : It is a very common issue across majority of HONDA ODYSSEY. It's the overheating of the camera and start to malfunction, causing all the warning systems lights to illuminate. A lots of people and families who have owned or currently owns HONDA ODYSSEYS minivans have either faced this problem in the past or having it more commonly now. Due to the malfunction caused by the FAILED MONOCULAR CAMERA, it tends to automatically disables the Lane assist function, Engine light comes on, Cruise control get disabled and two other warning comes on the dash. Please note that there are a lots of families who own these HONDA ODYSSEY have been facing this manufacturing fault that HONDA needs to address.

Mass safety system failure due to front projector camera/ wiring harness. noted systems below failed: Adaptive cruise control Auto emergency braking Forward collision warning Lane departure warning Lane keeping assistance Auto High beams All above system are not operational