OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P0445

Evaporative Emission System Purge Control Valve Circuit Shorted

The ECU detected a short in the EVAP purge solenoid control circuit. With the valve permanently energized or shorted, the system can either over-purge causing rich running, or stay closed.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 45

Possible causes

  • Purge valve circuit shorted high
  • Wiring or connector fault medium

Symptoms

  • Check engine light on
  • Possible smell of fuel near tank or engine bay
  • Failed emissions inspection
  • Loose-cap warning may appear

Inspection / repair

  • Difficulty: easy
  • DIY: possible

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Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication