P1646 BMW 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 BMW 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.
BMW Vehicle:BMW F650GS,BMW F800S,BMW F800ST,BMW G450X,BMW G650 Xmoto,BMW R1200GS,BMW R1200R,BMW R1200RT,BMW R1200S,BMW K1200LT,BMW K1300GT,BMW K1300R,BMW K1300S,BMW K1600GT and K1600GTL,BMW S1000RR,BMW E36/5,BMW E36/7,BMW E36/8,BMW E38,BMW E38/2,BMW E38/3,BMW E39,BMW E46/5,BMW E46/4,BMW E46/3,BMW E46/2,BMW E46/C,BMW E52,BMW E53,BMW E60,BMW E61,BMW E62,BMW E63,BMW E64,BMW E65,BMW E66,BMW E67,BMW E68,BMW E70,BMW E71,BMW E72,BMW E81,BMW E82,BMW E83,BMW E84,BMW E85,BMW E86,BMW E87,BMW E88,BMW E89,BMW E90,BMW E91,BMW E92,BMW E93,BMW F01,BMW F02,BMW F03,BMW F04,BMW F06,BMW F07,BMW F10,BMW F11,BMW F12,BMW F13,BMW F15,BMW F18,BMW F20,BMW F21,BMW F22,BMW F25,BMW F26,BMW F30,BMW F31,BMW F32,BMW F33,BMW F34,BMW F35,BMW F36,BMW F80,BMW F82