The evaporative emission control (EVAP) system prevents fuel vapors from entering the atmosphere by storing the vapors in a charcoal canister. A P0445 code gets logged if the system detects an anomaly in the purge flow from the EVAP system, indicating a potential issue with the operation of the purge control valve.
What Does the P0445 Code Mean?
Diagnostic trouble code (DTC) P0445 stands for “Evaporative Emission System Purge Control Valve “A” Circuit Shorted.” It indicates a potential issue with the purge control valve or its circuit.
As was mentioned, the EVAP system stores fuel vapors in a charcoal canister. When conditions are correct, Your car’s primary computer, which is often referred to as the powertrain control module (PCM), opens a device called the purge valve. Opening the valve creates a vacuum that draws fuel vapors from the charcoal canister into the engine to be burned.
The PCM performs various tests on the EVAP system. If the module perceives a problem with the purge valve or its circuit, it turns on the check engine light and stores code P0445 in its memory.
If you have a Volkswagen (especially a VW Jetta), Chevrolet, Toyota, Audi, or Jeep, your vehicle’s onboard diagnostics may register code P0445, and you must have the issue checked by a technician as soon as possible.
Note: The definition of code P0445 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
What are the Possible Causes of the P0445 Code?
The purge control valve regulates the purge flow of fuel vapor in the engine. This narrows down the likely causes of the P0445 code to:
- Failed purge valve
- Purge valve circuit issues, such as damaged wires or poor connections
- PCM issues, such as software in need of an update
What are the Common Symptoms of the P0445 Code?
This problem may cause the following symptoms:
- Check Engine Light activates
- Possible fuel odor
- The engine hesitates, experiences rough idling, or stalling
Sometimes, the vehicle will not display any warning signs associated with the P0445 code. Plugging a scan tool into the OBD port can confirm the presence of the diagnostic trouble code.
How to Diagnose the P0445 Code
Hunting down the cause of the P0445 code can prove daunting for anyone with minimal or no experience in car repair. Unless you know your way around your car’s EVAP system like it was the back of your hand, leave it to a professional mechanic or technician.
For an idea of what the troubleshooting process might involve, check out these videos:
How to Fix the P0445 Code
Once you’ve determined what triggered the P0445 code, figure out how to resolve the issue. Make sure to research a solution that’s specific to your vehicle’s year, make, and model. Consult online auto repair resources and guides to determine the right way to resolve the code P0445.
Other Notes About P0445
The Society of Automotive Engineers (SAE) set the generic code P0445. Your vehicle’s manufacturer may have a definition for the code, so a Ford P0445 case may not resemble or resolve in the same way as a P0445 Toyota incident.
This code resembles P0443 (EVAP Control System Purge Control Valve Circuit) and
P0444 (EVAP Purge Control Valve Circuit Open). P0443 triggers if the solenoid controlling the valve doesn’t display the right voltage or shows signs of an open circuit. In comparison, a P0444 gets logged when the solenoid shows no activity after the PCM ordered the purge valve opened.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic.