P0459

191001 - P0459

Information saved in
DME

Fault code
191001 - P0459

Fault text
Tank-venting valve, activation: short circuit to positive

Fault description
The diagnostic function monitors the electrical connection
between the DME and the EVAP evaporative emissions
valve.

Condition for fault identification
Test condition:
The fault is recognized when a control signal is transmitted
to the EVAP evaporative emissions valve and a short circuit
to positive is present.
Potential problem source(s):
- Defect in wiring harness between DME and EVAP
evaporative emissions valve
- Fuel tank ventilation valve defective
Terminal condition: Terminal 15
Voltage condition:
- Electrical system voltage > 10 V
Temperature condition:
- None
Time condition:
- 0.5 sec.
Other conditions:
- Component must receive activation signal

Condition for fault memory entry
This fault is logged in the control module's fault memory if
it remains present for longer than 0.5 sec.

Action in service
- Disconnect evaporative emissions valve and check wiring
harness
- Replace EVAP evaporative emissions valve

Fault effect and breakdown warning
Breakdown notice:
- Attempt to release excess pressure from the tank by
carefully opening the fuel filler cap. Then attempt a restart.
Possible apparent symptoms:
- In extreme cases the engine will be hard or impossible to
start.

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

Service instruction
- none