Question about 2006 Chevrolet Equinox
There are a couple things that can cause this.
First, replace the PCV valve and check for vacuum leaks.
Get some carburetor cleaner or starting fluid and spray the engine are down. If the engine revs or responds to the external fuel, you have a vacuum leak.
The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge solenoid valve OPEN and the EVAP canister vent solenoid valve CLOSED. This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or if the vacuum level decreases too rapidly, this DTC sets.
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Posted on May 31, 2010
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Posted on Jan 02, 2017
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