Subaru Outback misfire problems

Filed Jun 22, 2026 · Brakes, Engine · CO

On Monday [XXX] were driving on [XXX] going north up [XXX]. I was doing about 60-65 mph in traffic which was flowing in both directions. While ascending the pass, the car suddenly started to misfire, rapidly lost power, power steering failed and all dash lights lit up. With no shoulder to pull out this was a very scary experience. Eventually managed to limp to a spot where I could pull out off the pavement. Car was dead. Popping the hood showed significant battery corrosion. I had a toolkit with me. The voltmeter measured the battery voltage at 9.3V. Thinking maybe cleaning the battery terminals would allow the car to be restarted, I managed to get the cables off and cleaned everything with a wire brush. But still no power. After a while a state trooper passed by and hung on while I contacted a towing service. After another 1.5 hours, the tow truck arrived and towed the car the 60 miles or so to the dealership in Denver with my wife and I in the cab of the tow truck. Dealer repair invoice indicated Data Control Module (DCM) "causing excessive draw on electrical system." More significantly, the battery had drained below the the operating threshold voltage required for vehicle drivability (understood to be 10-10.5V). There was no mention of this by the dealer service adviser. Although dealer diagnostic was carried out, no computer codes were provided. Vehicle mileage at time of incident 73,456. I have owned the car since new and have all service records. Car was repaired and picked up from dealership on 06/10/26 with a replacement DCM. Battery was charged up but not replaced and left in corroded state. Battery will probably have been weakened by such a total discharge with reduced life expectancy. I have uploaded the dealer repair invoice. I have reported this incident to Subaru of America. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 4, 2025 · Airbags, Electrical · 97,803 miles · CT

The contact's girlfriend owns a 2012 Subaru Outback. The contact stated that the vehicle hesitated while starting. In addition, the contact attempted to jumpstart the vehicle; however, the vehicle failed to start. The check engine warning light was intermittently illuminated. The contact stated that during rainy weather, several unknown warning lights were illuminated. The contact scanned the vehicle with an OBD2 scanner and retrieved DTC codes: P0420 (Catalytic convertor) and P0057 (Ignition System). The vehicle was taken to a local dealer to be diagnosed. The contact was informed that there were failures with the rear brake pads, rotors, PCV valve, valve cover gasket, engine air filter, catalytic converter heat shield; and a cylinder #4 misfire. The DTC codes P0304, and P0420 (Catalytic convertor) were also retrieved. The contact was informed that the catalytic converter needed to be replaced first. The contact stated that several repairs were made prior; however, the failure persisted. Upon further investigation, the contact related the failure to Subaru Service Program Bulletin: WQC-39, WVY-35, WUF-91r, TKC-19R, and the federal safety agency Campaign Number: 20V003000 (Air Bags); however, the VIN was not included. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 97,803.

Filed Feb 3, 2024 · Engine, Transmission · VT

Vehicle has an automatic transmission and it stalls when stopping. There is no warning light on the dash. This happens more frequently when the vehicle is warm, in early operation it may only hesitate or run rough while stopping. A warm a stop is more likely to stall the vehicle than a slow stop. Hard braking at operating temperature will stall the vehicle without fail. This has been happening since I bought it and it occurs with each drive every day.

Filed May 24, 2023 · Fuel system · 39,000 miles · OR

The contact owns a 2019 Subaru Outback. The contact stated while driving approximately 60 MPH, the vehicle inadvertently decelerated while the accelerator pedal remained depressed. The engine misfired and the vehicle stalled. The check engine warning light illuminated, then several other unknown warning lights illuminated. The contact was able to maneuver the vehicle off the roadway. The vehicle failed to restart. The contact stated that she purchased an OBD reader and diagnosed the vehicle and retrieved codes: P0177, P0174, P0102 and P0113. The vehicle was then towed to the dealer where it was diagnosed that the fuel pump and mass airflow sensor failed and needed to be replaced. The vehicle was not repaired. The contact stated that the vehicle was previously repaired under the federal safety agency Campaign Number: 20V218000 (Fuel System, Gasoline). The manufacturer was not notified of the failure and the contact was informed that she would be notified however, the contact had not received a response. The failure mileage was approximately 39,000.

Filed Apr 10, 2022 · Engine, Fuel system · CA · fire

3 weeks ago the all of the warning lights came on. Had vehicle towed to dealership. Could not find out what was wrong. Saw there was a lot of carbon build up which was unusual since there is only 26,000 miles on vehicle. After a week a dealership a cleaning took it home. Went back the next day. They inspected and stated it was the spark plugs and needed new fuel injectors. Had replaced. Everything still covered. Picked vehicle up finally after 17 days of it being there. When picking it up the paper work stated the vehicle had cylinder 1 misfires 30-45 times in a 3 hour period. But was assured the vehicle was repaired and fully inspected and 100% safe. Within 24hrs of driving the vehicle. The next morning we drove to school and with after the second light we smelled smoothing rolled windows down and but was sure if it was us. Then had slowed down to turn at the next light to turn to pull over but didn’t get that opportunity before a boom and smoke and flame came and i rushed out of the car and took immediate action and got my 4 year old out of her car seat. Before the whole car was up in flames. I have heard that similar vehicles had similar issues but have had other repairs to deal with it.There was no lights that came on in the vehicle to warn us that something was wrong so thought the smell was from outside. Insurance and the auto maker are inspecting but i had to alert the automaker the dealership wasn’t going to. They stated that the insurance and automaker will just compare notes.

Filed Sep 24, 2021 · Engine, Transmission · CA

I experienced issues with the engine of my 2012 Subaru Outback shutting down at times when coming to a stop, and also stalling/idling when accelerating (such as when entering freeway). My engine light and brake light also turned on at the same time. Very concerned, I took it in to the local Subaru service center at around 112,000 miles. They inspected the car and replaced 2 spark plugs, and must have restart the computer to turn the warning lights off. Recently at 117,000 after entering the freeway at night , my car roughly idled and the stalled and would not properly accelerate, almost causing me to crash as it happened suddenly while driving on freeway. The engine light was flashing and brake light came on as well. I immediately pulled over. After the Subaru inspection the next day, I was told that this was being caused by the torque converter and is a known issue on this model. This is a very dangerous issue, I believe that if this incident would have happened the next morning while on my commute instead of at the less busy hour at night, a crash would have occurred. I believe a recall is warranted on this dangerous issue as it is known by Subaru that this issue affects certain models and they will not provide much help to customers if they are past the extended warranty. The issue can occur past the 100,000 mile mark on an otherwise good condition and well cared for vehicle. This puts the customer and other drivers at great risk. I am very concerned and upset about the danger this put myself and others in. I was personally left on the side of the freeway at night at 7 months pregnant, but the situation could have been much worse. Since Subaru is not required to let customers know of this issue, customers may experience this issue without proper remediation until a serious issue happens.

Filed Aug 4, 2021 · Electrical · VA

Battery drains - just goes dead. In the past six months it has happened @4 times. Checked twice at my garage and no problem found. Electrical system and battery checked out. After it is jumped it runs rough and not drivable until computer resets and windows have to be reset by hand. No warning lights of low battery.

Filed Aug 6, 2020 · Electrical, Engine · 19,000 miles · CA

Battery dies unexpectedly within a few minutes of the vehicle off and in accessory mode only (I.e. Car off, radio or lights on). Vehicle will not start without jump from battery pack or another vehicle. Car will not even crank but will only make a clicking noise. Occasionally, engine timing will be affected after jump and misfires will occur causing vehicle to run very rough until restarted, at which point electrical system seems to reset itself. To date, dealer has found no direct cause for the problem (I.e. No parasitic draws) but has replaced the battery (which are under warranty) multiple times. Problem has occurred numerous times since it was purchased in late 2015.

Filed Jun 15, 2020 · Electrical, Fuel system · 154,000 miles · AL

Car intermittently stalls and is hard to restart. Happens randomly with no check engine light or code in the ecu. Has happened on the highway at interstate speed and while stopped. Will not restart immediately. Rough idle at restart then back to normal. Mechanic was unable to recreate the problem and thus unable to repair. Creates potentially dangerous situation when stalling on the highway, intersection, etc.

Filed Aug 16, 2019 · FL

Hesitates for 3 to 4 seconds from a stop without warning. Has been occurring since we bought it new jan. 2017. Reported to service dept at dealership. Told it is the way I drive. Reported it to subaru corporate offices. They refuse to check into it and say it is not a problem. I am very careful about pulling into traffic as I never know when this will happen. It also has a rough idle. I know there is a problem with these vehicles in the throttle assembly.