2022 Subaru Outback: start-stop system problems

Filed Nov 9, 2026 · Electrical · VA

Monday, November 9th at 3:20 p.m. The auto start stop feature shut the car off in traffic and it wouldn't restart. I had my 12 year old in the back seat. After turning on the flashers, I had to exit the vehicle and get a jump pack I had in the back. Then I raised the hood and jump started the vehicle. I wasn't to far from the dealership, so I took the vehicle in to buy a new battery. My factory battery is just over 4 years old. They informed me I needed an upgraded battery, which I purchased and installed myself. I also had to purchase a new battery sleeve, tray, and clamp for about $400. I will be filing a formal complaint with Subaru of America tomorrow as they have placed me and my family in danger yet again.

Filed Jun 26, 2026 · Electrical, Engine · MD

On May 19th 2026 around noon time, while we (me and my wife passenger) were driving my 2022 Subaru Outback Touring (2.5L, non-turbo) in active congested traffic on our way to airport, the engine shut off as expected by the Auto Start-Stop system when I came to a stop. When I released the brake pedal to proceed, the engine failed to automatically restart. The vehicle became immobilized in a live traffic lane, creating a serious safety hazard with traffic backed up behind me and oncoming vehicles unable to predict my situation. No warning lights or alerts preceded the failure. After shifting to Park and pressing the ignition button multiple times, the engine eventually restarted. There was no prior history of stalling, no check engine light, and the battery and vehicle have been maintained per Subaru's schedule. This is a critical safety defect: a vehicle that disables its own engine in traffic and fails to restart on demand puts the driver, passengers, and surrounding traffic at immediate risk of rear-end collision. The Auto Start-Stop system should never leave a vehicle stranded in a live roadway. The vehicle is available for inspection. I have/have not yet taken the vehicle to a Subaru dealer for diagnosis.

Filed Jun 17, 2026 · Brakes, Electrical · WA

On June 15th 2026, I was at a red light and the Auto Start-Stop feature shut off the engine. When light turned green, my car lost power and started rolling downhill. During this rolling downhill, the brakes stopped working, I was unable to engage parking brake, and I wasn't able to do anything except find a place to safely use gravity to slow the vehicle down. If the hill was steeper, this scenario could have been deadly. It was so scary, I called 911 for assistance but got lucky I was able to stop the car before there was an accident. It turns out the battery didn't have enough power to allow the vehicle to restart and if this happens when the Auto Start-Stop feature is engage you lose the ability to use the brakes. I spoke to the local dealership and acknowledge that is a problem.

Filed Jun 5, 2026 · Electrical, Transmission · AZ

Recently, the 2022 Outback my mom drives has been having some strange electrical issues. About a year-or-so ago the battery in her outback died. Not unusual in Arizona. I replaced it with an upgraded AGM (Interstate) version—same group, same cranking power. No issues. Recently, after an oil change at the dealer, she called back to report that a “Check Engine” light had come on. She was told that she probably had not put the gas cap on properly. Gas cap was on properly; light went off the next day. A few days later the Auto Stop/Start (ASS) feature started acting up (not functioning). A few days later the ASS turned the engine off and did not restart automatically—in the middle of heavy traffic during rush hour. The ASS light came on. The engine started manually, and we got it home. Battery was dead the next morning. I charged it up and took the car to the local mechanic for a quick assessment. The battery was fine, charging, but the car threw a Code: P0871 Transmission Fluid Pressure Sensor Switch. This mechanic told us that there was a Technical Service bulletin through Subaru that addressed this issue but was also aware that it could be caused by the ASS killing the battery OR other electronic modules which fail to enter sleep mode—which would also cause random lights to come on. An appointment was made to take the car into Peoria Subaru, thinking it would be something they could diagnose easily. It had previously been in for the routine oil change with the inspection. When we dropped the car off, I provided the Advisor the code and a associated TSB for the code. We got the car back that day and were told the following: The tech found that the car currently has a “Aftermarket” AGM battery. Subarus require a “Enhanced Flooded Battery” which would explain multiple codes found for loss of communications and parasitic battery drain--for systems that don't go to "sleep" when the car is not running.

Filed Dec 3, 2025 · Electrical · CA

I experienced two serious electrical failures within a few days that caused the vehicle to stall without warning. At Nov 29, 2025, after parking for about 20 minutes, the car would not start. Symptoms included: • Very weak clicking from the starter • Dashboard flickering and dimming • Unable to shift out of Park without manual override • Jump-start did not work even though power was delivered The vehicle was towed to the Subaru dealer. The dealer reported: • Battery “low but fine after charging” • Alternator “normal” • Starter “normal” • No warning codes On Dec 2, 2025 the vehicle had been released without repairs. Only a few minutes after leaving the dealer, the car stalled in live traffic during an Auto Stop/Start event. Symptoms: • Immediate loss of all electrical power • All warning lights flashing erratically • Hazard lights did NOT illuminate externally • Gear shifter locked again • Vehicle would not restart on battery • Subaru roadside assistance jump-started the vehicle With Auto Stop/Start disabled, it was barely drivable and returned to the dealer. This appears to be a serious electrical or charging-system failure, possibly involving: • intermittent alternator failure • voltage collapse during Auto Stop/Start • BCM or power distribution fault The vehicle can stall unpredictably in traffic without warning, creating a significant risk of collision.This is not normal battery discharge — the battery was fully charged at the dealer minutes before the second failure. I am filing this complaint because this issue is dangerous and the dealer cannot reproduce or diagnose it. A formal investigation or recall may be necessary.

Filed Jan 29, 2023 · Electrical, Engine · NY

On January 28, 2023 at approximately 1930 hours, vehicle battery was dead after being in a parking garage for a week. Vehicle was jump started and being driven on a highway for about 10 miles at highway speeds. At a location on the NYC Harlem River Drive, traffic came to a stop for a minute or so. The 'Auto Start Stop System' stopped the motor as designed. When traffic started to move again, the motor would not restart and the battery was dead. We were disabled in the left lane of an unlit high speed, high volume highway in the dark with our emergency flashers rapidly going dim. After about 45 minutes and numerous near serious collision misses, a tow truck arrived to tow us off of the highway. The system that failed was the 'Auto Start Stop System' and the vehicle is available for inspection. I have 40 years of investigating and reconstructing fatal and serious motor vehicle collisions and this defect put the safety of the motoring public at a serious risk. It is unknown if the problem has been reproduced and the component has not been inspected by the manufacturer. There was not any warning indicators or other symptoms of the problem. To the contrary, the vehicle operator had the false assumption that all systems were operating properly. This defect presents a high risk of serious injury to highway users.

Filed Sep 7, 2021 · Fuel system, Steering · CO

The 2022 Subaru Outback has a "feature" called AUTO START STOP. This is intended as a fuel saving feature. In the car's Setup Menu, you have the choice to turn this feature off. However, this feature MUST be turned off EACH and EVERY TIME you start the car. The change is NOT held in memory. This fact was confirmed by a Subaru Customer Service Representative in a call on the morning of 9/7/2021. This Auto Start/Stop feature works just like a gasoline powered golf cart. Take your foot off the gas and the engine dies. Press the accelerator and the engine restarts. However, there is NOT oncoming traffic on a golf course. If the wheels are canted to the left or right, a notable amount of force is experienced in the steering wheel. Subaru should be FORCED IMMEDIATELY to make a software change to allow this feature to be disabled permanently. I also suspect that in extreme cold or as these vehicles age, this "feature" will become an extreme safety hazard.

Filed Aug 14, 2021 · Engine · MI

The initial incident occurred on July 31, 2021. I used the push button start to start the car, put the vehicle in reverse, and the vehicle proceeded to roll uncontrolled down my driveway, which is on a slope. I had no power steering or power brakes. I was able to safely stop the vehicle with no incident other than damage to the plastic over the right rear taillight. I turned the vehicle off and restarted it, and everything seemed operational. It seemed that the car's engine had not turned on, only the electrical system. The same issue happened repeatedly over the next few days. In observing what was happening, I have noticed that the push button ignition requires a significant press in order for the vehicle to start correctly - quite different from my experience with our previous two push-button start vehicles. In the "Getting Started Guide, Outback 2022", p. 41, instructions clearly state "briefly press and release the Engine START/STOP button." I submit that this is inaccurate, and that new vehicle owners should be advised as to what to do, and what to look for in the dashboard to understand that the vehicle engine has, in fact, started properly. I am a user experience researcher, including in automotive research, and we have an expression that there's no such thing as user error, just poor design. This is a clear example of poor design.