1996 GMC Jimmy DTCs P0440,P0507

1996 GMC JIMMY
256,843 MILES • 6 CYL • 4WD • AUTOMATIC
Avatar
DAVE-BRINSTON
  • MEMBER
  • 2 POSTS
There are three oxygen sensors on the exhaust,how do I test to see which one needs replacement.Or is there another solution to these codes?P0440,P0507
Oct 4, 2008 at 1:22 PM
Advertisement
Avatar
SWILLIAMS
  • ✓ASE Certified Mechanic
  • 597 POSTS
  • ASE Certified Mechanic
P0440 is an EVAP failure code.

P0507 is an idle control system, idle higher than expected.

With the two of these together it sounds like the front purge solenoid on the intake manifold is leaking and causing a vacuum leak through the EVAP system. It is a simple bolt on part that costs about 20 bucks. Two bolts to remove it and a clip that retains the vacuum line to the EVAP line. It could also be a larger vacuum leak though. Look for broken lines or listen for the leak as well when you test the solenoid valve.
Oct 13, 2008 at 8:23 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.