Failed smog because lean code P1071

Tiny
JIMMYJAMES1234
  • MEMBER
  • 2001 FORD EXPLORER
  • 2WD
  • AUTOMATIC
  • 193,823 MILES
We have had a new fuel pump, MAF sensor, o2 sensor and new exhaust gaskets on it. What else could be the problem?
Tuesday, May 24th, 2016 AT 5:39 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Most lean mixture codes are caused by a vacuum leak on the engine. That is where I would start. If you have access to a vacuum gauge, place it on any of the intake vacuum ports and start the engine. Vacuum should be around 18 pounds at idle. Also, if you have access to a scanner that can read real time live data, it would be helpful to see what the short term trim readings are. Let me know what you find.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, May 24th, 2016 AT 6:32 PM

Please login or register to post a reply.

Related P1071 Content

VIEW MORE

Sponsored links