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 Don Knight Your Own Question
Don Knight
Don Knight, ASE Certified Technician
Category: Dodge
Satisfied Customers: 1736
Experience:  40+ years all makes&modles
Type Your Dodge Question Here...
Don Knight is online now
A new question is answered every 9 seconds

Hi I have a p0440 code in my dodge 2003 1500.

Resolved Question:

Hi I have a p0440 code in my dodge 2003 1500.
Submitted: 5 years ago.
Category: Dodge
Expert:  Don Knight replied 5 years ago.

Don Knight :

Good morning.The code you have is for a system failure of the evap system.You will need a scan tool to see just what is not working.There are several components that can cause this problem,the most common is the leak detection pump but with out a scan tool to see just what is not working you will end up just throwing parts on your truck till you get the correct one.I would have a shop do the diognostics for you so you will know what is causing your problem.Please let me know if you need more assistance,Don


I have a scan tool that has a screen with different settings, can you tell me what to look for on my scan tool so that I could tell what is the problem.

Don Knight :

You need a level three scan tool to force the solenoids and NVLD to switch.You will also need a smoke tester to run all the manufactures test.That is why I suggested that you have the system checked by a shop that has all the equipment to check the whole system for your problem.

Don Knight and 4 other Dodge Specialists are ready to help you