I’m hoping someone will be able to help me with this question as my mechanics are making me crazy!! About two weeks ago I had the engine replaced in my 2000 Subaru Legacy. As I was driving it home from the shop, I noticed a lack of power. The car was having a really hard time getting above 40 mph. The next day the check engine light came on and I took it back to the mechanic. He first told me that I wasn’t getting any power because my floor mat was stuck up under my gas pedal (very strange answer that I knew was garbage) and that my check engine light was on because of a failed air sensor. Finally, he told me that I might have a failing transmission and to take it in to the dealership, he couldn’t diagnose the true problem himself.
So I took it to the Subaru dealership, who told me that I had a failed MAP sensor. Once they put in a new MAP sensor, they are now telling me that I have a failed air sensor. The original mechanic says that these are the sensors from the original engine, that he didn’t put in any new sensors with my new engine. My question is: how could it be that RIGHT after putting in a new engine (and spending a good chunk of money on that) could I now have all of these failing sensors? Is there a connection here between the installation of the new engine and the failing sensors? Has anyone seen anything like this before? They are telling me the new sensors will be another $600.
Please, any information or ideas will be much appreciated!!