2019 Acura MDX: sudden loss of power

Filed Jun 22, 2026 · Fuel system · CO

On [XXX], while traveling at highway speeds on [XXX], the vehicle suffered a sudden, complete loss of engine propulsion. The vehicle rapidly decelerated, refused to respond to accelerator input, and forced itself into a dangerous "Limp Mode" in live traffic, creating an immediate highway safety hazard. Multiple warning messages illuminated on the dashboard. The vehicle was towed to Mile High Acura under Repair Order #[XXX]. Diagnostic testing pulled stored Code P0087 for Low Fuel Pressure at the Fuel Rail. An inline fuel pressure gauge confirmed that the low-side fuel pressure was rapidly fluctuating between 55 and 64 PSI at idle. The dealership escalated the data to the Acura Corporate Tech Line (Ref #[XXX]), which reviewed the vehicle's onboard snapshot data and officially determined a terminal defect in the low-pressure fuel pump assembly, mandating the replacement of the low-side pump and both fuel relays. Dealership service records confirm that this vehicle previously had a low-pressure fuel pump recall performed in 2021 under the federal safety agency Campaign Number 21V‑215 (Acura Code CAI). The sudden failure of this replacement component matches the exact failure conditions detailed in the subsequent the federal safety agency Campaign Number 23V‑858 (Acura Codes KGC/KGD). In that expanded campaign, American Honda Motor Co. openly admitted to federal regulators that the early replacement "service parts" distributed and installed during the 21V‑215 window were manufactured with the exact same defective, swelling density impellers prone to subsequent deformation and complete failure. Despite their own corporate Tech Line explicitly confirming that the root cause of this dangerous highway power loss was the low-pressure fuel pump—the exact component of the 21V‑215 and 23V‑858 safety recall campaigns—Acura Client Relations denied 100% safety remedy coverage. Acura refused to provide the technical basis for their denial in writing. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 2, 2026 · Electrical, Engine · OH

My car has stalled while driving on the highway multiple times now. The first time it happened, it lost power, stopped accelerating, and cycled through multiple warning lights, causing a significant safety risk. I pulled over and it restarted within minutes. I took it to a repair shop and they could not find a problem with it, even with the codes provided. Nothing pointed to a solution. It happened two other times while I was driving my child on a highway where it lost acceleration and then kicked back in. Again, this post, a significant safety risk as always in a fast lane on a highway with my child cars behind me had to hit their brakes to avoid me after this incident. Other times it doesn’t lose power, yet it cycles through warning lights randomly. I took it to the dealer instead of a local shop. They texted me about items that should be fixed per an inspection, including struts and a battery replacement. Complete with a large bill just for diagnostics. Yet, nothing was found having to do with the main problem at hand. Losing power while driving. . My battery is less than six months old. I had it tested and it is fine. My vin is not listed in the recall, but, all of the symptoms match the other recalls of the same year make and model.

Filed Jul 30, 2025 · Fuel system · PR

My vehicle is showing identical symptoms to those described in recall 21V‑215/23V‑858 related to the fuel pump. Although my VIN is not listed in the recall, I would like to verify whether my fuel pump is part of the defective batch, as it is failing in the same way (e.g., loss of power, engine shutting off, hard starting when cold, etc.). Or please confirm if my car symptoms are related to different campaigns.

Filed Sep 6, 2024 · Transmission · TX

Driving down 45 at 70mph. Attempted to accelerate and change lanes. Car lost engine power and was almost rear ended before power was restored. Have been waiting almost a year for recall to be complete. Grubbs Acura called is the other day to have service performed. Made the aware of the symptoms. They tried to have us pay for a diagnostic. Informed them that the symptoms were that of the recall. We believe. The engine may have damage and should be further inspected and or replaced. The informed is that they replaced the connecting rod through the oil pain and did not touch the timing belts. However it’s time for timing belts and other maintenance to occur in the next 5k miles. Feel like the job was rushed and it is a safety hazard.

Filed Sep 3, 2024 · Engine · VA

Engine poweer failure while driving at highway speed. Vehicle could not maintain allowed highway speed (above 45 mph) while moving in fast traffic. First warning indicator appeared after driver noticed loss of power while driving 60 mph. Independent service center confirmed error code p0304, misfiring cylinder. Could not identify problem with spark plug or ignition coil. Technition found engine knocking during diagnostic exam.

Filed Apr 14, 2022 · Acceleration, Engine · AR

I was getting ready to pass a semi and when I went to accelerate I had no power. I pushed the pedal several times with no power. Then it finally kicked in and the car accelerated. I was almost rear ended due to me losing power. This has happened multiple times. No lights ever come on. I am also experiencing the car completely shutting off while stopped. When it does this, a message pops up that I need to shift to park. It takes a few tries and then I can restart the car. I have taken it to the dealership and they can’t replicate either issue. They told me there are no TSB’s on these issues. Dates this occurred in 2021: 8/27, 9/9, 10/5, 11/5. Dates this occurred in 2022: 3/4, 3/28, and 4/10.

Filed Dec 3, 2021 · Engine, Fuel system · TX

I think this recall needs to be expanded: Honda and Acura have recalled 2019 and 2020 vehicles including the CR-V and Accord for fuel pumps which can malfunction and cause the engine to lose power. My wife recently had her 2019 MDX stall on her in an intersection and she had to turn off the car and turn it back on so it would work. It sounds exactly like the below: “While driving, the vehicle shifts into Neutral, the transmission indicator comes and DTC P0657 (actuator supply voltage circuit/open) is stored. The driver will not be able to select any other gear until the vehicle is turned off and restarted. Update the PGM-FI [programmed fuel injection] software and the TCM software, clear any DTCs [diagnostic trouble codes], and do the PCM [powertrain control module] idle learn procedure.” - TSB 15-034 Additionally, May 23, 2021 we had an experience where the same MDX decelerated as we merged into traffic at I-30 and I-820 in Ft. Worth. I let off the accelerator going 60-70 MPH and then stepped on the accelerator to complete my merge and there was no power. Speed dropped to around 20 almost instantly. I had to completely let off the accelerator and depress it again to get going. Very scary situation considering how fast people drive on Texas freeways. These are two big issues Honda/Acura needs to address ASAP as both put consumers at risk of injury and possibly death.