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 JerryG Your Own Question
JerryG, Mechanic
Category: Car
Satisfied Customers: 47
Experience:  over 5 years experience in late model repair, 2000 to 2009
Type Your Car Question Here...
JerryG is online now
A new question is answered every 9 seconds

what do error codes P0171 and P0174 mean on a F150 Ford pickup

Resolved Question:

what do error codes P0171 and P0174 mean on a F150 Ford pickup truck?
Submitted: 7 years ago.
Category: Car
Expert:  JerryG replied 7 years ago.

P0171 is system to lean bank 1

P0174 is system to lean bank 2


I would suggest looking for air leaks, and checking your fuel pump and injectors. All these can lead to a lean system.

JerryG and other Car Specialists are ready to help you
Customer: replied 7 years ago.
Already knew it was lean and checked the hoses, is not an air leak, need to know what else could cause the problem such as dirty sensor and or leaking gasket.

Related Car Questions