I have a 2008 Subaru Outback. I recently had the car into the dealership for its 175,000 mile check up. The car's gas mileage dropped from 24-26 mpg to around 20 mpg prior to my bringing it in. They replaced the spark plugs
, changed out the engine air filter, and changed the oil and filters. I drove the car 30-40 minutes on highway and surface streets to my folks and then parked the car. When I started back up I got the CEL. I took it back to the dealership the next day thinking it was related to the service. They looked it over and said they didn't find anything wrong and cleared the code. After receiving the car back I noticed that the car would shudder when I stopped (like it was going to stall out), but then the RPMs would pick back up to normal idle. I drove it back up to my folks and when I restarted the car after being parked the CEL came back on. With the CEL on, the car no longer shudders when coming to a stop. I'm thinking this has to do with one of the O2 sensors, but figured I'd get your thoughts.
JA: Thanks. Can you give me any more details about your issue?
Customer: Car has 176,000 miles as of this morning. This is the first time this car has had this problem and had been running well through 174,000 miles.
JA: OK got it. Last thing — Subaru Mechanics generally expect a deposit of about $18 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.