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
Most likely it means your gas cap is loose... or whats called an evap system leak.
A P0442 indicates a EVAP System small leak. While this may be caused by a loose or worn gas cap, as is often the case, it usually points to 1 of 2 other problems. The "small leak" diagnostic indicates a leak as small as .020 inch in diameter which means it could be a leaking line within the evap system. It can also be a stuck open EVAP Vent Valve or a faulty Fuel Tank Pressure Sensor. This diagnostic has to be done by a shop with a scan tool capable of reading Tank Pressure voltage and/or performing a EVAP System Smoke test to find the leak.
0442 evap emission control system malfunction(small leak detected) 0443 evap emission control system purge control valve circuit malfunction 0450 evap emission control system pressure sensor malfunction 0455 evap emission control system malfunction(gross leak detected) there ya go
Evap System. Large leak.
EVAP control system leak detected, very small leak
EVAP code. po455 is an EVAP leak code for your vehicle's fuel emissions system. This is usually a fuel vapor leak or a lack of purge in the fuel vapor system. If you seem to be burning more fuel than usual you should get your car looked at soon. Could cause some problems down the road.
Evap Leak
Small evap leak.
evap leak
Large EVAP leak
a small evap leak would not cause your car to jerk.