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Check Engine Light and failed emissions test

Tiny
ETEITGE
  • MEMBER
  • 2001 MAZDA MPV
  • 2.5L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
My van has been trouble. I had it repaired twice over the summer. New MAF sensor, some new O2 sensors, a new carburator. Lots of expensive work. My check engine light is still on. (As an aside I will never return to the mechanic I used this summer.) I decided to try and do some work myself. I cleaned the throttle body and that seemed to help. From what I could tell all hoses seemed fine too. Do you have any suggestions? I am a rookie at best here.
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Tuesday, November 3rd, 2015 AT 11:02 PM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
I don't know what you really replaced but that car doesn't have a carburetor.

What is the code number being stored in the computer from the check engine light?
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Wednesday, November 4th, 2015 AT 2:17 AM
Tiny
ETEITGE
  • MEMBER
  • 2 POSTS
My mistake, I meant catalytic converter. The codes that come up are: P0102, P0171, and P0174.
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Wednesday, November 4th, 2015 AT 6:43 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
See if the intake snorkel has any cracks or leaks of any kind. Maybe a hose left off.
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Wednesday, November 4th, 2015 AT 6:56 AM

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