P0445

Universal

Evaporative Emission Control System Purge Control Valve Circuit Shorted

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium
Low Severity

The purge control valve regulates when fuel vapors from the evaporative-emissions system are drawn into the engine to be burned. This code means the vehicle detected an electrical short in the purge valve control circuit. It identifies a circuit condition, not proof that the valve itself has failed. The check-engine light may come on; emissions performance may be affected, and drivability symptoms are possible depending on the fault.

Report an error with this code

⚠️ Before You Begin (Safety First)

This code alone does not usually mean the vehicle must stop immediately. If you smell strong fuel vapors, see a fuel leak, or notice a significant change in how the vehicle runs, stop in a safe place and have it checked. Keep sparks and flames away from fuel vapors, and do not open the fuel system for basic checks.

Common Symptoms

  • The check-engine light may be on because the engine controller detected an electrical fault in the purge valve circuit.
  • There may be no noticeable change in driving if the circuit fault does not significantly affect purge operation.
  • Fuel-vapor emissions may increase if the system cannot control purge flow as intended.
  • Rough running or other drivability changes are possible if the electrical fault also leaves purge flow in an unintended state; the code alone does not establish that this has happened.

Common Causes

  • Damaged, chafed, or pinched wiring may create an unintended electrical connection in the purge valve control circuit.
  • Corrosion, looseness, or damage at the purge valve connector may disrupt the circuit.
  • The purge control valve may have an internal electrical fault that shorts its circuit.
  • A fault in the circuit's control side may be involved; further testing is needed before suspecting a control module.

Diagnostic Steps

  1. Confirm the code with a suitable scan tool and note any related codes before clearing anything; related information can help guide diagnosis.
  2. With the engine off and the vehicle cool, visually inspect accessible purge-valve wiring and connectors for chafing, pinching, corrosion, or loose connections.
  3. Check whether the connector is fully seated and visibly undamaged; avoid pulling on wires or forcing connector locks.
  4. If damage is not obvious, use model-, year-, and engine-specific service information before doing electrical tests; stop and seek qualified help if the checks require circuit probing or the wiring layout is unclear.
  5. After any repair, have the code and system operation rechecked rather than assuming the valve needs replacement.

When to Call a Professional

A technician can confirm the code and check related fault codes and scan data, then inspect the purge valve connector and harness for damage or unwanted electrical contact. Electrical testing can help distinguish a short in the wiring from a faulty valve or a control-module driver issue. The exact test method depends on the vehicle's service information.

Compare component listings

Confirm diagnosis and vehicle fitment before buying. A listing does not prove that a part needs replacement. We may earn a commission from qualifying purchases.

Search Amazon Search eBay

Commonly Asked Questions

Does P0445 prove the purge control valve is bad?

No. It reports a shorted condition in the valve's control circuit. Wiring, connectors, the valve, or the control side may be involved, so diagnosis is needed before replacing parts.

Can I keep driving with P0445?

The code alone does not usually require stopping immediately, but arrange diagnosis. Stop safely if you notice a fuel leak, strong fuel-vapor odor, or a significant running problem.

What does the purge control valve do?

It controls the flow of fuel vapors from the evaporative-emissions system into the engine, where they can be burned.

Will clearing the code fix the problem?

Clearing the code does not repair an electrical fault. If the cause remains, the code may return when the vehicle detects the condition again.

Does P0445 identify where the short is?

No. It identifies a shorted condition in the purge valve control circuit, but model-specific testing is needed to locate the fault.

Browse Available Code Guides

Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.