How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Jared D Your Own Question
Jared D
Jared D, ASE Certified Technician
Category: Ford
Satisfied Customers: 1906
Experience:  Shop Supervisor at County Fleet
Type Your Ford Question Here...
Jared D is online now
A new question is answered every 9 seconds

I have 1999 ford taurus i got the code p0171 and 174 may i

Customer Question

hello i have 1999 ford taurus i got the code p0171 and 174 may i know what it is
JA: Just to clarify, what's the exact code? And have you tried to reset it?
Customer: po174 & po171
JA: Are you fixing your Taurus yourself? What have you tried so far?
Customer: i have check with code reader machine so i got that codes
JA: Anything else you want the mechanic to know before I connect you?
Customer: no i just want to ask u for is that major problem?
Submitted: 11 months ago.
Category: Ford
Expert:  Jared D replied 11 months ago.


P0174 and p0171 are lean codes. These codes set when the engine detects too little fuel in the engine compared to the amount of air entering the engine. Most of the time this is caused by an air leak- this is often called a vaccum leak. Air entering the system which cannot be metered by the mass air flow sensor is burned in the engine casing the lean condition.

Another cause could be a weak fuel pump that is not able to provide enough fuel to the engine to keep up with the amount of air which also triggers a lean code.

Do you plan to fix this yourself?

Expert:  Jared D replied 11 months ago.

Please don't forget to rate. That's how Just Answer compensates me for my time