P2450 Possible Causes
- Faulty Evaporative Emission System Switching Valve
- Evaporative Emission System Switching Valve Circuit Open or Shorted
- Poor Electrical Connection in Evaporative Emission System Switching Valve Circuit
- Faulty Engine Control Module (ECM)
How to Fix Code P2450
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P2450 Symptoms
Possible
Illuminated Engine Light (or Service Engine Soon Warning Light)
P2450 Meaning
This error code is stored in the engine control module when there is a malfunction in the evaporative emission control circuit. The EVAP system allows the fuel tank to be purged in a controlled manner without releasing harmful gas emissions into the atmosphere. This is achieved by periodically allowing hydrocarbon emissions from the fuel tank into the intake manifold to enter the combustion process. The engine control module monitors the circuit’s integrity by observing the inductive spike generated when the solenoid valve is deactivated. This is due to the collapse of the magnetic field causing a back EMF (electromotive force). A solenoid typically has a resistance of 15 Ohms. The solenoid valve will be actuated by a pulse width modulated signal from the engine control module. The solenoid may be powered by a constant supply at system voltage or have a constant ground.
The system may not purge the carbon canister during idle conditions. The vehicle may need to be driven for the system to operate; an actuator test can be used to operate the solenoid valve with a scan tool.
Due to the presence of harmful hydrocarbons in the system, manufacturers must closely monitor the system in certain markets. This is achieved by adding specific hardware to measure system pressure and gas flow. The engine control module can monitor the system for leaks (both large and small) and for excessive or insufficient flow. This allows the technician to access more information related to the failure and provides a better chance for accurate diagnosis.