2018 Subaru Forester: check engine light

Filed Jun 20, 2025 · Electrical, Engine · MT

Yesterday 6/19/25 I was driving out the driveway when the vehicle accelerated on its own, and not slowly, but like it had been punched. I was actually coasting at the time since I didn't want to stir up dust. My foot was not on the gas pedal. And it was not the floor mat. It happened on its own, the first time in 87,000 miles. It probably cannot easily be replicated as it was completely random, although now that it's happened once, it very well could happen again if there's a faulty or aging part or sensor. Neither the local dealer nor Subaru has acknowledged the problem (I called both today) but it's a SERIOUS safety issue. No check engine light or other means of warning. It just happened out of nowhere. Glad I was in the driveway and not in town waiting while a pedestrian was crossing the street.

Filed May 20, 2025 · Engine · ID

Ticking noise on cold start up as well as reduced acceleration speed and torque. Diagnostics point me to believe the AVCS solenoids are beginning to fail prematurely. This has not been confirmed by a dealership and the issue is reproduced during any driving. There are no CEL lights active or codes stored. The vehicle currently has 74,*** miles. The issue started within the last 6 months. This is a safety concern when attempting to get up to highway and freeway onramps or getting up to merging or passing speeds.

Filed Oct 15, 2024 · Fuel system · NY

The initial incident happened when I was accelerating uphill. When I pressed the gas pedal to accelerate, the car began jerking and sputtering. I released the gas pedal and let the car coast, as I was heading toward a stop sign. After I stopped and then accelerated the second time, the engine seemed to smooth out. Nothing further happened until about 1 week later. The second incident, I was 35 minutes into an hour-long drive. I was going around 45-55mph when the same issue happened suddenly: I pressed the gas pedal and the car started shaking and sputtering. If I released the gas pedal, the car was fine. All check engine lights came on and were flashing. I lowered my speed into the 30s, and the issue continued to happen, regardless of what speed I was driving at. If I was accelerating, the car was shaking a lot. At stop signs, the lights would turn off, but pop on as soon as I began driving again. I was able to make it to my destination and when I parked the car, it was shaking a lot while idling. It felt like the engine was about to die or shut off. It was late so I turned the vehicle off and left it parked for the night. The next morning, when I started the car, it was continuing to shake/sputter during idle and I drove it briefly to see how it ran. It continued to shake when pressing the gas pedal, however, the check engine lights were not on. Since I had to drive back home, I decided to take it slow and began the two-hour drive back. The engine again seemed like it wanted to die as I let the car warm up, but it did not shut off. Initially when driving, the car continued to have the same problem - shaking whenever I pressed the gas pedal, no matter the speed. The check engine panel lights did not come on, however, and after driving for about 20 minutes, the issue cleared up. I've only driven it as needed since then and it is currently running ok, but, given the numerous fuel pump recalls I'm concerned there is a defect with this model.

Filed Dec 13, 2021 · Fuel system · CA

At around 35,400 miles on the odometer, the vehicle first started backfiring as I was driving. I began an uphill climb through low mountains and the check engine light began flashing, the "emissions control systems" warning light came on the screen, the engine began seriously sputtering and lost a lot of its power, all occurring at the same time. Luckily I have a standard transmission and was able to downshift through gears to regain some power and was able to drive 10 miles, seriously sputtering the whole time, to a safe location. I turned off the engine and it wouldn't start back up again, therefore, I had to have it towed home. The next day I had it towed to a Subaru dealer. It took them 5-6 days to diagnose the cause and fix. I was told it was a VERY rare occurrence; it was pinpointed to the fuel injector and coil, they went bad in cylinder #1. The parts were replaced with new ones and a new spark plug was installed as well. ALL codes are gone and the problem was completely fixed. Thankfully, the service was covered by manufacturer's warranty of 5yrs/60,000 miles power train. For being such a fairly new engine, this problem should not of occurred. A defective fuel injector. However, I can understand that there can always be some sort of flukes. As of this writing, I have not gone to the dealership to pick up the vehicle.

Filed Jul 26, 2018 · 7,650 miles · NV

My 2018 subaru forester xt shut off while driving 2 times on 7/26/18. Nothing happened, no warning lights,it just shut off while driving. And came to a sudden stop in a matter of seconds -I was going 40 MPH. After it shut off the battery light came one, the check engine, and the esp electronic stability light came on. Extreamly heart stopping to have your vehicle shut off/stall, whatever, while on a road, especially a highway. Luckily I was on a street where I could get to the side before it completely stopped. But I had just gotten off the freeway however I commute to work one a freeway. If this happens again today, I pray I'm not on the freeway or anywhere where I can't safely get over on time before I'm hit. It started again no problem, then stalled again in my driveway 10 minutes later. My vehicle is an automatic CVT transmission and shouldn't stall while driving.