Manufacturer Code Charts: 190201

190201 - P0442

Information saved in
DME

Fault code
190201 - P0442

Fault text
Fuel tank ventilation system and purge air system, minor
leak: Leak greater than 1.0 mm

Fault description
The diagnostic function monitors the DMTL module pump's
electrical current draw within a time window.

Condition for fault identification
Test condition:
The fault is recognized when the correct current value is not
obtained within a time window defined in the program map.
Potential problem source(s):
- Leakage > 1 mm in tank EVAP vent system
Terminal condition: none
Voltage condition:
- 10.95 V < electrical system voltage < 16 V
Temperature condition:
- Ambient temperature between 1.5 °C and 38 °C
Time condition:
- None
Other conditions:
- Tank fuel level between 1/4 and 3/4

Condition for fault memory entry
The diagnostic fault code is logged when the fault remains
present after the following routine is completed:
- DMTL operational check
- Driving distance > 200 m, during which the vehicle speed
must exceed 15 km/h at least once

Action in service
- If diagnostic fault codes for the DMTL are logged, then
clear the control module fault memory
- Carry out DMTL operational test (see 'Condition for
logging diagnostic fault code')
- If it is possible to reproduce the fault with the DMTL
operational test then look for a leak in the EVAP vent
system

Fault effect and breakdown warning
Breakdown notice:
- none
Possible apparent symptoms:
- none

Driver information
Warning light:
- ECE emissions warning lamp: off
- US emissions warning lamp: on
- ECE electronic engine power reduction: off
- US electronic engine power reduction: off
- CC message: none

Service instruction
- Operational testing on the DMTL (Diagnostic Module
Tank Leakage) can only be carried out provided that no
faults related to the DMTL have been logged. The
conditions for fault detection apply to the function test, but
not to diagnosis in the course of normal operation.