On my 99 Tacoma (V6 with 40k miles), I've had a check engine light coming on and off. It's on at the moment, ran it by Autozone, and they pulled a P0171 code.
Noticed in Lon's garage that a 171 can be:
- air induction system
- injector blockage
- Mass Air Flow meter
- engine coolant temp sensor
- Heated oxygen sensor (bank 1, 2 sensor 1)
Before I proceed with replacing the oxygen sensor, should I replaced the Mass Air Flow meter? Exactly where is this sensor located, and what does it look like?