My car has 85000 miles.
My car has an automatic transmission.
As you know, any number of things within the EVAP system can cause these codes to be triggered. The most common problem with the vent valve is when it sticks open or doesn’t close. This creates an EVAP system leak and triggers the Check Engine or Service Engine Soon light. If you are limited on time and money, you may want to start with checking the smaller easier things like the gas cap and potentially the purge valve solenoid as these are a bit cheaper to replace. If these check out fine, it may be time to have it diagnosed by a qualified mechanic.
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Anytime you have a cylinder head hardware issue, or any other mechanical problems, it’s important to have a professional mechanic, such as one from YourMechanic, determine exactly why the Check Engine Light is on before additional damage occurs.
The best way to resolve this would be to use a factory scan tool that will allow you to go into the computer and clear this adaptive memory back to factory. If you are looking to have this done, consider using YourMechanic, as a certified mechanic can come to your home or office to inspect and repair your high engine idle speed problem.
With regard to Diagnostic Trouble Code P1450, actually, there is much more that could be at issue than just a blocked EVAP canister or vent solenoid. That trouble code will also set if there is a kinked or collapsed hose between the canister and the fuel tank, a faulty fuel tank pressure (FTP) sensor or even a fuel filler cap that is stuck closed, preventing vacuum relief to the tank. So, basically, when you request a diagnostic from YourMechanic, all those possible faults have to EACH be ruled in or out. Parts are never just automatically replaced, at least not by reputable, professional mechanics, simply because a code sets and "refers" to a part or parts. Instead the parts referred to in diagnostic trouble codes have to be separately and sequentially diagnosed, and often tested, in a "decision tree". So, the bottom line is codes merely supply clues as to the fault and NEVER constitute a definitive diagnostic of the type that only a qualified mechanic can perform.
The other code that you are reporting, namely P2195 could have set due to intake vacuum leaks or intake hose leaks between the mass air sensor and the throttle body, excessive fuel pressure, and/or fuel injector(s) that might be leaking or stuck open.