P0445: Evaporative Emission Control System Purge Control Valve Circuit Shorted
Can you still drive? Yes, driving is safe. However, a shorted circuit could potentially blow a fuse, so have it checked at your convenience.
What Does P0445 Mean?
Code P0445 indicates a short circuit condition in the EVAP purge control valve circuit. The ECM has detected lower than expected resistance in the circuit, suggesting the wiring is shorting to ground or to battery voltage, or the purge valve solenoid has an internal short. A shorted circuit can cause the purge valve to remain energized or behave erratically.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Short circuit in purge valve wiring harness
- Internally shorted purge valve solenoid
- Damaged wiring rubbing against metal causing ground short
- Water intrusion into purge valve connector
- Melted wire insulation near exhaust components
Symptoms
- Check engine light on
- Failed emissions test
- Purge valve may click continuously
- Possible fuel odor
Diagnostic Steps
- 1Disconnect the purge valve and check if the code clears, isolating the valve from the wiring
- 2Measure purge valve solenoid resistance and compare to specifications
- 3Inspect wiring harness for chafing, exposed copper, or melted insulation
- 4Check for water or corrosion inside the purge valve connector
- 5Test wiring for shorts to ground and shorts to voltage with a multimeter
Recommended Parts & Tools
wiring harness repair kit
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $40 - $250 |
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Frequently Asked Questions
What is the difference between an open and shorted circuit?
An open circuit means the wire is broken and no current flows. A shorted circuit means current is taking an unintended path, such as through the wire insulation to ground, which can cause excessive current flow and component damage.
Can P0445 drain my battery?
It is unlikely but possible. If the short keeps the purge valve solenoid energized when the engine is off, it could draw a small amount of current. More commonly, a short will blow the circuit fuse, preventing drain.
Community Fix Reports
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