Fault code description for purge control valve, ME
Purge control valve, voltage supply
1
Fault code
( Readout on generic scan tool)
P2026 (P0443)
2
Fault storage
Actuation of the engine diagnosis indicator lamp (EURO3/4)
or CHECK ENGINE (MIL) malfunction indicator lamp
after expiry of test duration and fault
following two successive driving cycles with faults
3
Checking frequency
Continuous
4
Checked signal or status
Voltage and current at purge control valve
5
Fault setting conditions
Limit values
Short circuit to ground
Short circuit to +12 V
Open circuit in wiring
Checking duration
Voltage lower than 4 volts
Current higher than 4.2 amps
No voltage on the purge control valve,
Approx. 4 to 8 V on under no load output of the ME control unit
approx. 1 seconds
6
Actuation of the purge control valve is checked for to detect a line discontinuity and short-circuit (to ground or battery voltage). A short circuit to ground and a line discontinuity will be recognized when the output stages are locked, while a short circuit to the battery voltage is recognized when the output stages are conducting.
The output stage is immediately no longer activated when a fault arises.
If the purge control valve does not close (jams), the fault purge system has a gross leak will be stored.