You have to find the cracked hose, loose component, etc and repair/replace it.
You have to find the cracked hose, loose component, etc and repair/replace it.
These are the options for code 31. You need to have it checked with a scanner, If you know the "P" number you will know what to check. The old two digit codes are not specific enough. EVAP LEAK MONITOR LARGE LEAK DETECTED p0455 EVAP LEAK MONITOR PINCHED HOSE FOUND p1486 EVAP LEAK MONITOR SMALL LEAK DETECTED p0442 EVAP PURGE FLOW MONITOR FAILURE p0441. EVAP PURGE SOLENOID CIRCUIT p0443
Evap System. Large leak.
Large EVAP leak
A large EVAP leak, probably a faulty gas cap
EVAP Emission Control System Leak (Large)
DTC P0455: Evaporative Emission (EVAP) System Large Leak
P0442: Evaporative Emission System Leak Detected (small leak) P0455: EVAP Large Leak Detected
P0455 - Evap Emission Control System Leak Detected ( no purge flow or large leak )
Every once in a while it will fix your evap leak if you replace the fuel cap, but usually the leak is somewhere else. A good repair facillity will have a smoke machine that can be used to fill the system with smoke and locate the leak by seeing where the smoke comes out.
To fix an evaporative emission control system (EVAP) leak in a Toyota Sienna, first, conduct a thorough inspection of the EVAP system, including hoses, connectors, and the gas cap for any visible damage or loose fittings. Use a diagnostic scanner to identify trouble codes related to the EVAP system, which can help pinpoint the source of the leak. If a specific component is found to be faulty, such as a damaged hose or a failing purge valve, replace it. After repairs, clear any codes and perform a leak test to ensure the system is functioning properly.
Trouble code P0455 means:Evaporative emission (EVAP) control system leak detected (no purge flow or large leak)
P0442 = EVAP Emission Control System Leak (small). Fix the leak and the light will go away. Could be as simple as a loose or defective fuel cap.