2017 Subaru Forester: check engine light

Filed Sep 11, 2026 · Engine · CA

the TGV valve metal flap screw came undone and came loose with the intake manifold. piece of metal about 1 in x 2 inch (flap) fell down to cylinder 2 intake and rubbed against the intake valve nipping pieces off and those pieces of metal along with loose screw fell chipping corner of cylinder 2 top edge. at my shop they had to replace cylinder 2 and TGV valve and rebuild the damaged cylinder head. REASON WHY I TOOK IT TO THE SHOP There was small vibrations at a idle at about 800 rpm (stationary) and already replaced the spark plug and fuel injector and it still shook little bit. since i couldn't figure out what was the issue decided to take it to a mechanic. about a week prior to dropping the car off at the mechanics I heard a metal clinking in the engine for a minute and went away. after that the Miles per gallon went from 27 down to 25 miles per gallon. before taking the car to the shop there was a warning light on cylinder 2 on my OBDII reader ( not a full check engine light). a screw shouldn't be loosening in a internal combustion engine part where if not taken care of it can detonate an engine and cost user thousands of dollars and it was not their fault. I researched on this same issue and I found few online where they were showing videos of them moving the loose part with a screw driver. Have not found any one where the part came off completely and went down into the intake valve.

Filed Dec 3, 2024 · Engine · 140,000 miles · MN

The contact owns a 2017 Subaru Forester. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated, and several safety features failed to function as intended. In addition, the contact stated that the check engine warning light had been illuminated intermittently for over a month prior to a diagnostic test. The vehicle was taken to the dealer where DTC code: P0420 was retrieved, and the vehicle was diagnosed with catalytic converter failure. The contact was informed that the catalytic converter needed to be replaced. The vehicle was scheduled to be repaired. The contact researched Warranty Extension: 09-84-22; however, the contact was informed that the repair was not covered under any warranty programs. In addition, the contact stated that the case manager provided false information and stated that the Warranty Extension document did not exist. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 140,000.

Filed Jul 13, 2021 · Electrical · 22,375 miles · CA

The contact owns a 2017 Subaru Forester. The contact stated while attempting to start the vehicle, the vehicle would not start due to battery drainage. The contact stated that the battery had to be connected to a battery charger after each use. The contact stated that the check engine warning lights was illuminated. The vehicle was not diagnosed nor repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 22,375.

Filed Oct 25, 2020 · 50,100 miles · NY

Car check engine light went on while driving. Safety features advertised with the subaru forester such as blind spot detection, cruise control, forward accident avoidance all stopped working. Once the code was cleared from the car, these safety features returned. The check engine light was caused by failure to secure gas cap tightly. I believe that safety features should not be disabled with check engine light going onb.

Filed Oct 12, 2020 · Acceleration, Electrical · 64,500 miles · CA

The vehicle was traveling along the highway at around 65-75mph and we went up a grade (cuesta grade) along 101 freeway in california and vehicle had a sudden loss in power while climbing up the hill. Ultimately, no power was ever regained and the vehicle shut off completely and stopped. We were stuck on the side of the road and had to call 911 to have a chp offer park behind us so that we would not be hit because we were partially in the lane. The car could not move so we had to have it towed to a subaru dealership. We received a check engine light, vehicle emissions controls, hill assist, and the car was shaking. Subaru recently made a recall on models that have had a loss of power but my vehicle is not on the list but I did experience everything mentioned in the recall. Can you assist?

Filed May 13, 2020 · Engine · 20,000 miles · AK

We have a 2017 subaru forester xt touring model 2.0 turbo engine with approximately 20,000 miles. Wife and son were traveling to a wedding when check engine light came on no sooner did light come on heavy smoke filled inside of car from air vents heavy smoke was coming out from under hood also waited for smoke to clear noticed oil all over engine had vehicle towed to subaru dealership service manager called and said there was a hole in engine block I asked him how could happen he said it could be faulty engine this vehicle is a fire hazard my family could of been seriously been injured if vehicle caught fire while they were driving or passed out due to heavy smoke inside vehicle was in motion traveling on paved black surface road this vehicle should be recalled completely.

Filed Dec 29, 2019 · Acceleration, Fuel system · 29,000 miles · WA

I was driving on the high way for about 2 hours, 70 MPH, gas was at about 1/8 full, but low gas light on. The gear shifter remained in d and the indicator on the dash said d. The engine revved as if it were in neutral and would not provide power to the wheels. The check engine, traction control, and cruise control lights came on, along with possibly others. The car began to slow since it was just revving in what appeared to be neutral while the gas pedal was pressed. Eventually I made it to the shoulder. I turned the car off for about 15 seconds then started it again. It struggled to start for a moment like the battery was low or it was cold outside, but still started on the first try. I shifted into d and began to move on the shoulder, but when the car when over about 10 or 15 MPH, it would rev and not provide power to the wheels. I had the car towed to the dealer where they added gas, test drove it, said there was nothing wrong, and nothing that they could do.

Filed Feb 27, 2019 · Electrical, Engine · 26,645 miles · CA

Driving in the freeway around 20-30mph, some traffic. On the way to dropping daughters off to school. On the freeway switched lanes then car lost power and decelerated on its own quickly from 20mph to about 1mph, pressing the didn't do anything. Almost got hit by the rear driver behind me. Managed to move to right lane. Pressing the gas pedal did nothing, several lights on the dashboard appeared which included check engine light, traction control, oil light. Turned off the car to find the number for towing about 15 minutes later turned on the car and this time pressing the gas pedal made the car go, dashboard lights still on. Took the car directly to the dealership. Dealer claimed it was a bad cell on the battery that caused the problem, and also reprogrammed the computer. Bad cell on battery will not cause this to happen. Dealer also failed to write the details of the incident. Initial paperwork stated check engine light. Advice dealer to properly document incident.

Filed Dec 6, 2018 · Engine · 16,500 miles · CO

2.5 manual, burns oil at excessive rate. Check engine oil light turned twice so far, once at 2k miles on a car and next time at 16k miles. Both lights were well within the oil change schedule and the car has not been subdued to any unusual use. Unable to travel in the car long distances without having 2 quarts of oil in a trunk due to possible engine failure for lack of oil. Both times the low oil lights went up when traveling on roads and sunaru dealer had to add oil (still under warranty).

Filed Sep 26, 2018 · Electrical, Transmission · 47,800 miles · CO

Vehicles battery has slow cranking power, since new currant miles are 47,800 today vehicles slow to start ,once started all engine warning lights illuminate and stay on and vehicle will not drive in forward or reverse, replaced battery with new and vehicle started normal and strong, put into drive and vehicle drove normal, put into reverse and again vehicle will not drive forward or reverses, vehicle in in dealership repair facilities at this time, problem unknown,