What is the diagnostic trouble code for EVAP?
P2422 is a diagnostic trouble code (DTC) for “Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed”.
What does p2422 mean on an EVAP system?
EVAP trouble codes that may be a symptom of the P2422 trouble code: The P2422 diagnostic trouble code is an indication that the vent valve of the evaporative emissions control system (EVAP) is stuck closed. The EVAP system reduces harmful pollutants, generated by the engine combustion process, from being expelled into the environment.
What happens if the EVAP valve is stuck?
If the EVAP vent valve is stuck in the closed position, fuel vapors will be prevented from flowing through the vent valve and into the engine. The powertrain control module (PCM) receives a voltage signal from the vent valve control circuit. This voltage signal carries information regarding the pressure and flow of the EVAP system.
P2422 is a diagnostic trouble code (DTC) for “Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed”.
EVAP trouble codes that may be a symptom of the P2422 trouble code: The P2422 diagnostic trouble code is an indication that the vent valve of the evaporative emissions control system (EVAP) is stuck closed. The EVAP system reduces harmful pollutants, generated by the engine combustion process, from being expelled into the environment.
If the EVAP vent valve is stuck in the closed position, fuel vapors will be prevented from flowing through the vent valve and into the engine. The powertrain control module (PCM) receives a voltage signal from the vent valve control circuit. This voltage signal carries information regarding the pressure and flow of the EVAP system.
What happens when the EVAP vent valve fails?
From the above it should be obvious that the EVAP vent valve is a critical component in the EVAP system, and should the PCM detect that the vent valve has failed, in the sense that it is stuck in the closed position, it will set code P2422 as a result.
What does it mean when a vent valve is stuck?
Note that depending on the application, code P2422 could mean that the valve is actually stuck in the closed position, or, that it cannot be commanded to open due to a failure or malfunction in its control system, or, that the vent valve cannot communicate its status (whether it is open or closed) to the PCM.
What causes an EVAP canister to be stuck closed?
However, if the fuel tank internal pressure is below the specified value (excessive vacuum is detected) when starting the engine, the malfunction detection should be done as follows because it is difficult to distinguish the FTP sensor range problem (P1454) from the EVAP canister vent shut valve stuck closed (P2422). 1.
From the above it should be obvious that the EVAP vent valve is a critical component in the EVAP system, and should the PCM detect that the vent valve has failed, in the sense that it is stuck in the closed position, it will set code P2422 as a result.
However, if the fuel tank internal pressure is below the specified value (excessive vacuum is detected) when starting the engine, the malfunction detection should be done as follows because it is difficult to distinguish the FTP sensor range problem (P1454) from the EVAP canister vent shut valve stuck closed (P2422). 1.
Note that depending on the application, code P2422 could mean that the valve is actually stuck in the closed position, or, that it cannot be commanded to open due to a failure or malfunction in its control system, or, that the vent valve cannot communicate its status (whether it is open or closed) to the PCM.