2019 Toyota Camry: misfire or rough idle

Filed Dec 17, 2025 · Engine · CA

The vehicle has experienced ongoing engine misfire issues while driving. The check engine light illuminated, and diagnostic testing identified a cylinder misfire (P0302). The vehicle shakes, runs rough, and has reduced power, especially during acceleration. These symptoms create a safety concern, as the loss of power and engine instability could affect the ability to safely merge, accelerate, or maintain speed in traffic. The issue has been confirmed by diagnostic scans performed by an independent service center. The problem appears to be persistent and not consistent with normal wear for a vehicle of this age and mileage. No collision has occurred, but the condition poses an ongoing safety risk while operating the vehicle. The issue has not yet been resolved by the manufacturer.

Filed May 8, 2025 · Fuel system · CA

Two weeks prior, car began rough idling at stop-lights, intermittently. Then one morning, after refueling, the car sputtered and failed to start. The MIL light came on, with display warnings: “Charging System Malfunction” and Steering Power Low”. Car eventually started and barely made it to Carlsbad (CA) Toyota. DTC code pulled was P0171: “System Too Lean Bank 1”. It was diagnosed with low or leaking high-pressure reading for the high-pressure fuel rail. They replaced all four high-pressure direct injectors. However, idle roughness persisted until they replaced the canister purge valve. Car has only used Costco top-tier fuel. Injectors should not have failed at 47,000 miles; likely defective. Fuel pump was replaced years ago under recall, and I was told that fuel pump pressure was fine.

Filed Aug 3, 2024 · Electrical · CA

Driving along, went to pass someone and the ICS malfunction came on, reduce speed and visit dealer. The Camry had no “juice”. It shook. I put on emergency lights and drove on the side of the road. Pulled over and turned off car. Turned back on and there were no warning lights on. I drove to Toyota dealership and they diagnosed it as “ignition coil” was bad and it had misfired that’s why the malfunction light came on. Needless to say, the car has 39,005 miles on it!!!

Filed Jan 3, 2023 · Brakes, Electrical · MO

My 2019 Toyota Camry was left in my driveway for three days during the winter, and during that time, a rodent or rodent(s) got inside the engine and insulation and ate the engine cover, multiple writing harnesses, damaged the ignition coil(s), and rendered the vehicle un-operable, requiring a tow to Toyota for repair. The initial DTCs from the rodent were Cylinder 3 and 4 misfire, pre-collision system, emergency brakes, and parking brakes, among others. When the 2019 Camry was left in my driveway for three days, two other cars were also parked, one on each side of the Camry, and sustained no rodent damage. Come to find out, the electrical components, insulation, and writing harness in Toyota vehicles all contain a Soy ingredient that apparently rodents love.

Filed Oct 30, 2020 · Electrical, Engine · 43,000 miles · GA

I purchased the vehicle from a dealer in june of 2020 and was unaware of any ongoing recalls or that any required service had not been completed. I've had the vehicle in the shop multiple times for engine stalling while driving, engine shaking, misfiring, and loss of forward momentum. Not once did they tell me about the recall or that toyota was aware of the problem until I took the vehicle to a different automotive shop. The new shop gave me all the recall information and advised that the vehicle is not safe to drive. The engine will sputter and shake in idle and in reverse. Consistently the vehicle shakes and runs very rough when in idle, reverse or attempting to accelerate from stop lights, red lights, parking lots, etc. Dealership told me that I wasn't used to the electronic fuel ignition and that the sputtering and delay in forward momentum was normal. One time I was driving 65mph and the vehicle stalled while on a island causeway. Luckily I was in the right had lane and was able to get off the road safely. Another time the vehicle stalled was in a parking lot (again slow speed) and again in reverse. The vehicle did sustain rodent damage to wiring on 2 occasions which the dealership repaired, noted the multiple engine misfires and "cleared the codes". The vehicle ran better for about a week and then the same problem begins reoccurring. The spark plugs continue to foul due to the engine fuel pressure issue.

Filed Aug 19, 2020 · Fuel system · 37,000 miles · IN

Car stops working and runs rough and the dealer said it's a bad fuel pump but doesn't have a recall