Car coded for a po446. Replaced vent solenoid valve. Reset light came back on.
Checked for power to the vent sol. Valve good. Checked for ground to the valve by activating the valve with the scanner, no ground signal. Traced the ground wire back to the pcm (white wire pos. 45)back probed and checked for ground signal again, nothing. Brough car to dealer they check and came up with the same thing and replaced the pcm. When I picked up the car I asked if they ran a function test and they said yes and it passed. Two days later light came back on. Pull the evap canister and it had some dirt in it so I replaced it. Reset light back on in two days. Replaced fuel tank pres. Sensor, purge solenoid valve.
I am able to click the vent sol. Valve with my tester. The light remains on.I blew out the evap lines the light remains on.
Monday, October 1st, 2018 AT 10:51 AM