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What is your question?
the info code P0450 shows up in the title of the info but in the body of the explanation, it shows P0452 several times. So is the info pertaining to P0450 or P0452?
2 Replies
first thing is to check and make sure gas cap is on tight.is so remove gas cap and check the gasket on the under side of cap for cracks,splits in gasket.also make sure gasket is still in the cap.rule of thumb,when replacing cap after fuel put in,screw cap on,untill clicks 3 times.post results
thank you for that info but it doesn't answer my ?. Is the article I mentioned talking about code P0450 or P0452?
something going on with evap system,check cap first P0450 Toyota Description The Evaporative Emission System (EVAP) vapor pressure sensor, VSV for canister closed valve (CCV) and VSV for pressure switching valve are used to detect abnormalities in the evaporative emission control system. The Engine Control Module (ECM) decides whether there is an abnormality in the evaporative emission control system based on the vapor pressure sensor signal. If there are no loose or broken hoses on the EVAP canister, and the gas cap is firmly tight, replaced the EVAP Control System Pressure Sensor to repair the problem. P0452 Description The Evaporative Emission System (EVAP) control system pressure sensor detects pressure in the purge line. The sensor output voltage to the Engine Control Module (ECM) increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.