2012 Honda Civic power train problems

“The contact owns a 2012 Honda Civic. The contact stated that while driving at various speeds, the vehicle hesitated or stalled while depressing the accelerator pedal. The “Check Emission Systems" message was displayed on the instrument panel. The contact then received notification from the Manufacturer for Honda Service Bulletin: 19-106. The vehicle was taken to the dealer, where a PCM update was performed. Recently, the contact stated that the "Check Emission Systems" message returned, and the vehicle hesitated while depressing the accelerator pedal. The dealer was notified of the failure and provided the cost for a diagnostic test. The manufacturer was notified of the failure, and the contact was provided with a case number. The contact was also informed that dealers were independently owned and could not be forced to repair the vehicle under the service bulletin. The vehicle was not repaired. The failure mileage was approximately 211,000.”

“Component or system failure: The vehicle experienced failures involving the engine/ignition system, emissions system, Vehicle Stability Assist (VSA), and power steering. On July 14, 2025, warning messages appeared for “Check Emissions System,” “Check VSA System,” and “Check Power Steering System.” Diagnostics identified engine misfire code P0304 (Cylinder #4). On August 11, 2025, an authorized Honda dealership confirmed a seized spark plug and cylinder head damage, indicating an internal engine defect. The vehicle is currently with the selling dealership and available for inspection. Safety risk: Simultaneous failure warnings for emissions, VSA, and power steering created an unsafe driving condition. Impaired stability control and power steering increase the risk of loss of vehicle control during turning or emergency maneuvers. Confirmation of problem: Yes. Independent diagnostics confirmed the misfire. The selling dealer attempted repairs between July 22–25, 2025, but the same warnings returned. On August 8, 2025, the dealer admitted it lacked tools and software to diagnose or repair CNG vehicles. Honda later confirmed internal engine damage. Inspections: The…”

“While driving, my 2012 Honda Civic Hybrid suddenly loses power and steering ability. The vehicle stalls and the steering wheel locks up, making it impossible to safely maneuver. This has happened multiple times, including in traffic, creating a serious risk of collision. When the failure occurs, warning lights illuminate on the dashboard, including the IMA light, anti-lock brake light, and others. In some cases, all dash lights flash before the car stalls. When scanned with an OBD tool, the vehicle shows power inverter-related fault codes. The symptoms are consistent with the IMA motor power inverter defect described in Honda Recall H98 (2012–2015 Civic Hybrid inverter recall). However, my VIN does not currently show as part of that recall. Despite this, the vehicle is clearly experiencing the same safety defect. This defect causes sudden loss of propulsion and steering assist, placing myself, passengers, and other drivers at serious risk. The vehicle is available for inspection upon request.”

“I am reporting a serious safety concern with my 2012 Honda Civic Hybrid. What component or system failed and is it available for inspection? The hybrid drive system and regenerative braking system are malfunctioning. The hybrid battery recharging system including the MPI have failed, causing the vehicle to operate solely on the gasoline engine. This results in degraded braking performance due to the loss of regenerative braking. How was safety put at risk? When the hybrid system fails, braking performance is noticeably reduced, increasing stopping distances. This creates a high risk of collision, especially in sudden-stop situations or heavy traffic. Additionally, the sudden loss of hybrid power assistance can cause unsafe changes in vehicle acceleration and handling. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The issue has been confirmed by Pearson Honda in Midlothian, Virginia. They state the MPI needs to be replaced and state my VIN is outside their "factory warranty extension". Multiple calls to Honda America state that I am responsible for all repairs and that this is not their problem and will not clarify…”

“The contact owns a 2012 Honda Civic. The contact stated that while attempting to park the vehicle, the vehicle was turned off and the vehicle started to roll away. The vehicle was stopped, and the parking brake was engaged to stop the vehicle. The vehicle was towed to an independent mechanic, where it was diagnosed that the front axle had failed and needed to be replaced. The vehicle was repaired. The contact also stated that while at a stop light, the vehicle vibrated, and the contact heard an abnormal sound coming from the vehicle. The accelerator pedal was depressed, and the vehicle unexpectedly lunged forward. There was no warning light illuminated. An independent was contacted; however, the vehicle was not diagnosed or repaired. The dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 156,000.”

“The contact owns a 2012 Honda Civic. The contact stated that while exiting a parking structure, the vehicle failed to accelerate, the steering column started to fail, and the vehicle began to make an abnormal sound coming from the front driver’s side. The vehicle was towed to the local dealer where it was diagnosed as having a shredded C-axle and transmission failure. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 140,000.”