I have a 1995 Toyota Previa minivan S/C w/ check engine light that's been in the shop numerous times. They see a P0171 code, and we have replaced the MAF and it still hesitates when going up steep hills for a long time ( I live in colorado at 9,300 feet - there's a lot of hills). I Am NOT a competent mechanic -- rather, a non-mechanically inclined woman, but the shop doesn't seem to fix my car.
Could it be the ECU?
How do I find out?
Thursday, September 20th, 2012 AT 2:53 AM