2012 HONDA ODYSSEY Complaints

I own a Honda Odyssey equipped with the Auto Idle Stop (automatic engine start-stop) system. The feature has not operated properly and behaves inconsistently. In addition to frequently failing to engage when the vehicle is stopped, I have experienced several instances where the engine shut off as part of the Auto Idle Stop function and then failed to restart promptly when I attempted to proceed. On several occasions, while stopped at red lights on major roads and highways, the vehicle stalled and took a considerable amount of time to restart. During these incidents, I was unable to move the vehicle when traffic began moving, leaving me stranded in active traffic lanes and creating a significant safety hazard. The delayed restart exposed me and my passengers to the risk of rear-end collisions and other accidents. This issue has occurred multiple times and has caused me to lose confidence in the reliability and safety of the Auto Idle Stop system. A vehicle should not become temporarily disabled in traffic due to the failure of a system intended to improve fuel efficiency. Given the repeated nature of the problem and the potential for serious injury, I believe this issue warrants investigation. On August 7, 2026, I brought my Honda Odyssey to an authorized Honda dealership to diagnose the Auto Idle Stop system due to repeated incidents in which the vehicle failed to restart promptly after the engine shut off at a stop. According to the dealership's service report, the technician stated that they had identified similar complaints from other Honda Odyssey owners and that Honda is currently investigating the concern. The technician monitored live vehicle data and determined that the battery voltage did not drop excessively, the starter was not drawing excessive voltage, and no diagnostic snapshots or fault data were stored by the vehicle at the time of inspection. As a result, the dealership was unable to perform any repairs.

piston rings wore out prematurely on our 2012 honda odyssey. this was caused by the vcm system. its a known issue on hondas. it only had 88,600 miles at the time. we were driving our 2012 honda odyssey in december 2023. the check engine light began to flash. it starting running rough. we had it towed to a honda dealer for inspection. they pulled codes p303 and p304. they said the rings were worn and spark plugs fouled. they said this is a common issue because of the vcm. they peformed a rering job and with all parts and labor the cost came to $4000. we are very disgusted that this issue was already known by honda and they failed to place the vehicle on recall or wave the repair cost. they had a previous recall for this issue, but they say it was for a limited time frame. my mother only drives less than 10k miles a year, so the issue wouldnt have happened before 2016, as the miles on her van were still very low. we are issueing a complaint against honda for this issue. we are asking for reimbursement for the repair for the piston ring job which was $4000 while we had the vehicle in for this repair, we were also informed of other issues with the van, and we went ahead with those repairs as well, which brought our repair bill total to over $6419, which is also shown on the same receipt.

Odometer Fraud. The contact purchased a 2012 Honda Odyssey. It was discovered that there was a mileage discrepancy. The vehicle was a private sale. The vehicle mileage was 117,000 at the time of purchase; however, the title listed the mileage at 14,580. The Department of Motor Vehicle reported that the actual mileage as 214,000.

The 2012 Honda odyssey alternator caught on fire after the battery light came on which luckily I, the driver, was able to put out. The next day I towed the vehicle to Boyd Honda Auto in Oxford, NC, where they confirmed with diagnostic that the alternator was overworking and that there was a seeping spool valve. This seeping spool valve is a manufacturer’s defect.

On Wednesday night, the battery light initially came on and after a few minutes the van had this burning smell so I pulled over and the alternator was on fire. I put it out with several bottles of water from papa John’s. Today, at Boyd Honda in Oxford said in the diagnosis that there was a sweeping spool valve that had leaked which must have caused the alternator to blaze because this is a manufacturer’s defect from Honda.

Odometer Fraud. The contact purchased a 2012 Honda Odyssey. The contact discovered that there was a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 80,000. It was later discovered, after checking the Carfax report that the mileage was 285,000.

For several years now, we have misfire issue or code P0304. We continue to change spark plugs cylinders. Both usually last a year or so then they need replaced again. I research the problem, no recall or the like. I did see his report on-line, wondering if it applies to us, Warranty Extension: MIL Comes On with DTCs P0301 thru P0304. Any help would be greatly appreciated.

Dear NHTSA Advisor, Thank you for regarding my request for warranty coverage for the critical misfire and overheating defect with my 2012 Odyssey Honda Engine 3.5L Engine. Odyssey, as described in Honda’s Service Technical Bulletin 13-081. I must reiterate the severity of my situation: the part required for repair is quoted at $7,500.00—and that does not include labor. This amount far exceeds the current market value of my vehicle, effectively making it impossible to afford repairs without Honda’s intervention, it’s aSafety Defect & Known Manufacturer Issue. The misfiring and overheating problems represent major safety risks for my family and anyone who operates the vehicle. This is not routine maintenance, but a substantial defect that Honda has addressed in its own technical bulletin. I have adhered diligently to Honda’s maintenance schedule throughout my ownership. Attached to this correspondence is a PDF containing the complete Service Technical Bulletin 13-081. I am prepared to provide any additional documentation upon request. WARRANTY EXTENSION: MIL COMES ON WITH DTCS P0301 THRU P0304 TECHNICAL SERVICE BULLETIN Reference Numbers): 13-081, Date of Issue: October 08, 2020 HONDA: 2011-13 Odyssey Superceded Bulletin(s): 13-081, Date of Issue: June 18, 2019 Aug 5, 2025 License: Odometer: NOTE: Supersedes 13-081, dated June 18, 2019, to revise the information below. AFFECTED VEHICLES AFFECTED VEHICLES Year Model Trim Level VIN Range 2011-13 Odyssey ALL Check the iN VIN status for eligibility. REVISION SUMMARY Under CUSTOMER NOTIFICATION, outdated information was removed. CORRECTIVE ACTION 2011 Models: Complete diagnosis procedure and if necessary, update PCM software (Procedure A) , replace affected spark plugs then clean pistons and replace the piston rings (Procedure B) • 2012-13 Models: Complete diagnosis procedure, replace affected spark plugs then clean the pistons and replace the pistons rings (Procedure B). No need for software update as 2012-13

The contact owns a 2012 Honda Odyssey equipped with Cooper Tires, Tire Line: CS5 Grand Touring, Tire Size: P235/65/R17, DOT Number: (N/A). The contact stated while driving 70 MPH, the vehicle started to vibrate abnormally. The driver was able to pull over safely and became aware of a blowout of the front passenger’s side tire. There were no warning lights illuminated. The contact stated that while driving 70 MPH, there was an abnormal vibration in the steering wheel. The vehicle was taken to a tire center where it was determined that the failure was linked to a busted tire core. The damaged tire and driver's side rear tire were replaced. The contact stated that while continuing to drive, the steering wheel and the vehicle continued to vibrate. The vehicle was taken to a tire center, where it was determined that the driver's side front tire had a shifted radial belt, and a bulge was detected. The tire was replaced. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The vehicle failure mileage was approximately 79,694. The tire mileage was approximately 20,000.

Odometer Fraud. The contact purchased a 2012 Honda Odyssey. The contact stated that while attempting to register the vehicle, it was discovered that there was a mileage discrepancy. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 130,000, and at the time of registration, it was discovered that the mileage was 230,000. Local authorities had been notified.