2020 Subaru Outback: fuel pump failure

Filed Jul 13, 2025 · Electrical, Engine · AZ

Car stalled in traffic. The engine was cranking but it would not start. Had AAA tow off the road and to my home. Car sat for 10 days waiting for a fuel pump (thought this was the problem). After sitting for 10 days the battery was totally dead! New fuel pump installed battery was jumped but could not start the car. After 2 hours on the charger the battery still did not have enough energy to turn over the engine. Car is in a certified service shop (Wilhelm). Battery replaced and same starting issues with the new battery and the new battery is discharging at a very high rate even though the car is not starting. Bought the car used in 2023 so I have no knowledge of the history of the car. Service provider running factory diagnostic testing but so far no determination as to cause of the high rate of discharge. Verified that the fuel pump is fully operational. What we know is that with a fresh fully charged battery and a working fuel pump the car will not start and remain running. The engine stops and the battery drain is excessive.

Filed Sep 2, 2022 · Engine · 9,846 miles · FL

The contact owns a 2020 Subaru Outback. The contact stated while driving 30 MPH, the vehicle began to jerk and then stalled. The check engine warning light and several unknown warning lights were illuminated. The contact was unable to veer to the side of the road. The contact was able to restart the vehicle and continued driving; however, the failure reoccurred that same day. The contact veered to the side of the road and restarted the vehicle. The contact was able to drive to her residence; however, the failure persisted. The vehicle was towed to the dealer where it was diagnosed that the Engine Control Module (ECM) was malfunctioning. The dealer reset the warning lights; however, the failure had recurred more increasingly. The vehicle was then towed to a second dealer, Subaru of Pembroke Pines (16100 Pines Blvd, Pembroke Pines, FL 33027) where the fuel pump and high-pressure fuel pump were replaced; however, the failure persisted. The dealer then replaced the Engine Control Module (ECM). The vehicle was not fixed and remained at the dealer since July 12, 2022. The manufacturer was notified of the failure and followed up with the dealer. The contact was awaiting a call back from the manufacturer. A case was opened. The failure mileage was approximately 9,846.

Filed Jul 6, 2022 · Fuel system · 11,000 miles · FL

The contact owns a 2020 Subaru Outback. The contact stated while driving approximately 25 MPH, the vehicle inadvertently stopped in the middle of the road. There was no warning light illuminated. The contact engaged the hazard lights; the police arrived on the scene and helped to move the vehicle safely to the side of the road. The vehicle was towed to the dealer. The dealer diagnosed the vehicle with a faulty fuel pump. The fuel pump was replaced. The manufacturer was notified of the failure. The approximate failure mileage was 11,000.

Filed Nov 17, 2021 · Electrical, Engine · MA

11/10/21 first incident: vehicle stalled in middle of dangerous busy road intersection: would not start. After about 15-20 min, it restarted. Drove to Dealer who reported: "battery low, taking too many short trips running down the battery. Many codes found. all referring to low battery". 11/16/21 second incident in remote beach parking lot. After a 30-45 min walk, vehicle would not start. solenoids clicked, engine turned over a few times, but would not start. 15-20 min later, was able to start. Drove to dealer and left vehicle. Tech wondered if problem was maybe not the battery, possible loose wire, but none found immediately. Left car with them. 11/17/21: Dealer called: "bad fuel pump overheating and stopping. once cooled down would run again." Ordered a new part will be here in 2 days. I am not sure of their explanation since the car had a long time in the cold for fuel pump to cool down. If they are right, then the fuel pump must be defective from manufacturer.

Filed Aug 13, 2021 · Fuel system · OR

Car has twice stalled out when driving slowly in hot weather. When trying to restart vehicle the engine turned over just fine, but wouldn’t restart until much later after the car had a chance to cool down completely. Possible vapor lock or faulty fuel pump.

Filed Sep 28, 2020 · Fuel system · 3,300 miles · IA

Driving on a busy road, made a stop at a light. When I got the green arrow to turn left, car just died in the middle of the intersection. Was fortunate, 4 good individuals jumped out of their vehicles to push us out of the intersection and avoid collision with oncoming traffic. Called subaru for a tow. During the 2 hour wait, tried to start a couple of times with no luck. When tow truck arrived, was to put it in neutral, so attempted to start again, which it did. Drove immediately to dealership. Stayed there for 2 and a half weeks. They replaced fuel pump, which in my mind, may not be at the root of the problem. My thoughts are that something overheated, possibly a circuit or software that caused the malfunction. It was a 95 degree day, the car had been idling for about 20 minutes in a store parking lot right before the shutdown. In talking with subaru, they will not give me root cause once they do further analysis on the problem. I feel at great risk this can happen at any time going forward, (ie on the interstate, at an intersection, etc). I'm hoping that logging this incident will help other outback owners know of the potential danger they may be in.