Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

t-code 440 98 gmc sierra 4.3

reyes45's Avatar

Join Date: Mar 2003
Posts: 71

05-10-04, 03:01 PM   #1  
t-code 440 98 gmc sierra 4.3

Hi Guys,
Today my truck`s check engine light turned . I scanned the computer and it registered code 440. My question is , what could have caused this code and whet should i start checking first. Thanks in advance.

Sponsored Links
Desi501's Avatar

Join Date: Oct 2003
Posts: 2,207

05-10-04, 05:10 PM   #2  
Not sure what you mean by "t" code. Is this a PO440?. If that's what it is you may have just left the gas cap loose. It's pretty common. It could mean another problem with the evap sytem too. The definition is "Evaporative Emmision Control System Malfunction" That's pretty broad but a loose gas cap will set it.

davo's Avatar

Join Date: Apr 2002
Posts: 2,417

05-10-04, 06:19 PM   #3  
Do you drive off road alot or on gravel roads?Let me know then we know what path to follow.

Search this Thread