P0445

Evaporative Emission System Monitoring - 0.020" (0.5mm) Diameter











Evaporative Emission System Monitoring - 0.040" (1.0mm) Diameter











DTC P0445
Cannister purge valve fault (power stage) Drive cycle C:Signal out of range - below minimum.

Possible causes by suggested order of priority:
- Cannister purge valve open circuit.
- Cannister purge valve short circuit.
- Cannister purge valve driver (in ECM) stuck on.
- Cannister purge valve driver (in ECM) stuck off.
- Fuse condition - F2 Engine Compartment Fusebox
- Open circuit - C152/2 (NK) to C570/1 (NK).
- Open circuit - C152/1 (NR) to C636/3 (NR).
- Connector(s) C152,ECM C636 (B).

Cannister purge valve open circuit.
- Check resistance > 1M Ohm

Cannister purge valve short circuit.
- Check resistance < 5.0 Ohm

Cannister purge valve driver (in ECM) stuck on.
- Cannister purge valve driver (in ECM) stuck on.
POSSIBLE FAULTS
- Faulty ECM - Valve always energized (open) when ignition on.
- Harness cable connected to C152/1 (NR) shorted to ground - Valve always energized (open).
- Use multimeter to manually check components.

Cannister purge valve driver (in ECM) stuck off.
CHECK THE FOLLOWING:
- Cannister purge valve driver (in ECM) stuck off.
POSSIBLE FAULTS
- Faulty ECM - Valve never energized (always closed).
- Harness cable connected to C152/1 (NR) shorted to battery positive - Valve never energized (always closed).
- Use multimeter to manually check components.

Fuse condition - F2 Engine Compartment Fusebox
- Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded.
- Certain diagnostics may also perform further checks to try and narrow down the fault. Eg Check if other circuits fed by the same fuse are also experiencing problems

Open circuit - C152/2 (NK) to C570/1 (NK).
- Check resistance > 1M Ohm

Open circuit - C152/1 (NR) to C636/3 (NR).
- Check resistance > 1M Ohm

Connector(s) C152,ECM C636 (B).
- Check for connector not correctly latched, backed out pins, damaged pins, corroded pins