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 Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1672
Experience:  GM Grand Master Technician 2007. 14 year experience.
Type Your GMC Question Here...
Gm Tech (Cam) is online now
A new question is answered every 9 seconds

P0171 failure replaced o2 sensor #1 no help... thinkimg map

Customer Question

p0171 failure replaced o2 sensor #1 no help... thinkimg map sensor because load reads 100$% a lot..
JA: Have you located all of the vehicle's oxygen sensors? Are the wires leading to and from each intact and in good shape?
Customer: yes I can see the sensiior values on a Bluetooth obdii
JA: What is the model/year of your GM?
Customer: 2006 envoy
JA: Are you fixing your Envoy yourself? What have you tried so far?
Customer: v6
JA: Anything else you want the mechanic to know before I connect you?
Customer: cant think of it...
Submitted: 6 months ago.
Category: GMC
Expert:  david craig replied 6 months ago.

Hi Im David thanks for visiting the site. allow me a few moments to pull up some information for you. thanks

Customer: replied 6 months ago.
Expert:  david craig replied 6 months ago.

P0171 refers to the fuel trim system being lean. Possible causes could be water in the fuel, too much alcohol in the fuel, a clogged fuel injector and/or a weak fuel pump. check out these TSB's on your vehicle.

Expert:  david craig replied 6 months ago.

checking in to see how its going

Expert:  david craig replied 5 months ago.

were you able to have it taken care of?