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Engine codes

Tiny
PAPA1HUNDRED
  • MEMBER
  • 2000 FORD EXPLORER
  • 170,000 MILES
Can you Tell me what do these engine codes mean

P0171
P0174
Friday, January 22nd, 2016 AT 7:55 AM

4 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
They mean the fuel system is too lean and the computer has reached it's adaptive limits and can no longer compensate for it.

On a Ford, 90% or the time this is caused by a bad vacuum leak at one of the large rubber hoses or connectors.
You can perform a smoke test to locate it if it's not obvious.
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Friday, January 22nd, 2016 AT 8:33 AM
Tiny
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Wow thanks for responding so quickly, amazing, is a smoke test something I can do myself or do I have to take into a shop. THANKS. AGAIN
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Friday, January 22nd, 2016 AT 8:52 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
The smoke machine costs about $1000 so I doubt you have one. You probably need to have someone do it for you.
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Friday, January 22nd, 2016 AT 8:54 AM
Tiny
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Sure thing thanks again for your help.
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Friday, January 22nd, 2016 AT 8:59 AM

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