P2422 Possible Causes
- Faulty evaporative emission vent shutoff valve
- Evaporative emission vent shutoff valve harness is open or shorted
- Poor electrical connection in evaporative emission vent shutoff valve circuit
How to Fix Code P2422
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.
P2422
Symptoms
Possible
Illuminated engine light (or service engine soon warning light)
P2422 Meaning
The fuel tank pressure (FTP) sensor output indicates atmospheric pressure of 0 kPa (0 in.Hg, 0 mmHg) before purge starts because the evaporative emission (EVAP) tank vent shutoff valve is normally open (open to atmosphere). The sensor indicates a negative pressure (vacuum) value during purge.
When the FTP sensor indicates vacuum after engine start, there is a possibility of FTP sensor zero point offset failure or closed EVAP canister vent shutoff valve failure. Therefore, the powertrain control module (PCM) monitors the FTP sensor output after purge starts. The PCM detects a malfunction of the EVAP canister vent shutoff valve if the output indicates excessive vacuum.
However, if the internal fuel tank pressure is below the specified value (excessive vacuum is detected) during engine start, malfunction detection must be performed as follows because it is difficult to distinguish between the FTP sensor range problem (P1454) and the EVAP canister purge shutoff valve stuck closed (P2422).
1. If no diagnostic trouble code (DTC) (P1454 or P2422) is recorded, both DTCs are recorded.
2. If both temporary DTCs (P1454 and P2422) are stored and excessive vacuum is detected, both DTCs are stored.
3. If a temporary DTC (P1454 or P2422) is recorded and excessive vacuum is detected, the PCM stores the DTC of the temporary DTC that was recorded.