SPONSORED LINKS

OBD code P0171, will not start

Tiny
JDUNFORD2871
  • MEMBER
  • 2006 CHEVROLET TRAILBLAZER
  • 4.2L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
Truck cranks so I'm pretty sure the battery is strong. But it won't start. Seems like it's not getting fuel. It was running fine the night before and I went out in the morning and nothing.
Thursday, February 6th, 2020 AT 12:59 PM

2 Replies

Tiny
JOETECHPRO
  • MECHANIC
  • 705 POSTS
Hey JDUNFORD2871,

OBD code P0171 points to fuel system too lean, this would point towards a fuel pressure problem.

If the engine is turning over slowly then trying to boost with jumper cables or a jump pack will rule out a low battery state of charge.

A quick test to attempt to see if the fuel pump has stopped working would be to tap the bottom of the fuel tank whilst someone is cranking the motor. Using a rubber/wooden mallet or something that will not dent the tank. This can sometimes shock the pump and get it going. You then know you have a fuel pump issue.

Let me know how this goes. The next step will be to check fuel pressure.
Do you have access to a gauge for this?

Regards, Joe
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Thursday, February 6th, 2020 AT 4:51 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Here is a guide to help you as well:

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

Please run down this guide and report back.
Was this
answer
helpful?
Yes
No
Sunday, February 9th, 2020 AT 10:46 AM

Please login or register to post a reply.

Related Engine Not Running Content

How to fix an engine that wont start
VIDEO
How to fix an engine that wont start
Instructional repair video
Engine Not Starting
GUIDE
Engine Not Starting
Over the past 20 years at 2CarPros we have identified the top problems that are easily fixed. This guide can save you a trip to the repair garage or calling a tow truck and...
VIEW MORE

Sponsored links