P1646 Citroen EVAP Vent Solenoid Output Circuit
Possible causes
– Faulty EVAP Vent Solenoid
– EVAP Vent Solenoid harness is open or shorted
– EVAP Vent Solenoid circuit poor electrical connection
– EVAP Vent Solenoid harness is open or shorted
– EVAP Vent Solenoid circuit poor electrical connection
What about the obd code?
The Powertrain Control Module (PCM) has detected the EVAP Vent Solenoid circuit was low
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1646 Citroen Description
The Powertrain Control Module (PCM) contains chips called Output Driver Modules that provide 7 switchable ground outputs for operating solenoids, relays, telltales, and other devices. Each of these ground outputs has an internal fault line that feeds back to the PCMs microprocessor. When the output is OFF, the output driver should receive the 12 volts fed to the solenoid, relay, etc. When the output is ON, it should receive 0 volt since it is grounding the output. If it receives 0 volt when the output is OFF or 12 volts when the output is ON, it sets the fault line low.
Citroen Vehicle:2013 Citroen,2012 Citroen,2011 Citroen,2010 Citroen,2009 Citroen,2008 Citroen,2007 Citroen,2006 Citroen,2005 Citroen,2004 Citroen,2003 Citroen,2002 Citroen,2001 Citroen,2000 Citroen,1999 Citroen,1998 Citroen,1997 Citroen,1996 Citroen,