Question

1998 Chevrolet Venture V6, how do i fix trouble code P1665?

Answer 1

Hi there

This code is for the evap vent control circuit conditions.

The most common cause for this issue is the vent control valve itself. You could have a wiring issue as well that isn't commanding the vent control valve on and off when it should, but the most common problem is the valve itself.

Answer 2

P1665 CHEVROLET - EVAP Vent Solenoid Control Circuit Conditions

Read more: https://www.autocodes.com/p1665_chevrolet.html