04-06-2009, 07:56 PM
Join Date: Apr 2009
Error Code P0446 2001 Tahoe
2001 Chevy 4X4 5.3L Tahoe with 200K miles
check engine light is on,autozone says code is P0446. This is what their ticket says:
The PCM has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.
EVAP (Evaporative Emission System) purge/vent solenoid circuit condition
The solenoids and system wiring are monitored for opens or shorts
1- Purge or vent solenoids defective
2- Check connevtor and wiring
3- Fuel saturated vapor canister
4- Failed EVAP vent solenoid
If the Vent solenoid is defective, what effects would this cause to the motor? Could it cause the motor to miss at low RPM?
Any info and help is appreciated.
Thank you in advance for your help!
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04-07-2009, 07:53 AM
Welcome to the forum
To the best of my knowledge the evap system witch is an emissions system should not affect drive ability, at least not in the sense of a miss or rough idle, the EGR which is also emissions could cause a rough idle.
With that many miles I would suspect fuel delivery / ignition
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04-08-2009, 11:32 AM
Join Date: Apr 2006
Location: KC, MO area
Welcome to the Tahoe forum. Remember that DTCs just point to an area of a problem and usually require further troubleshooting to determine the underlying cause.
2010 Sheer Silver Tahoe LTZ (all options but sunroof, power boards), GM (body color flaps, rear console, 3rd row mat, 2-Way Remote, chrome gas door, Esky rack), Eagle Eye LED tails, SLP dual tip exhaust, Silver bow-ties/rear wiper, Catch-All mats, AlphaTherm washer fluid heater, Putco chrome mirror covers, silver calipers, board chrome trim, tint, GMPP Major Guard
2007 Black Tahoe LTZ (Sold),
flaps-$15, Lund Step Tubes-$80
04-08-2009, 11:32 AM
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