Question about 2002 Chevrolet Cavalier Coupe

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2002 Cavalier error code 440 and 452 What do they mean?

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This indicates that a part of the Evap control system  is no longer functioning correctly. The Evap system consists of many parts, including (but not limited to) the Gas Cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a cars fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
A code P0440 could mean one or more of the following has happened:
The gas cap is not installed or working properly
The purge solenoid has failed
The canister is plugged and not working properly
TRY this first: Remove and reinstall the gas cap or replace, clear the code, and drive for a day and see if the codes come back.
Inspect the Evap system for cuts/holes in tubes/hoses
Inspect for damaged or disconnected hoses around the Evap purge solenoid
Check and/or replace the sensor
Check and/or replace the purge valve

P0452 Evaporative Emission Control System Pressure Sensor Low Input

Good luck and hope this helps. Recap star with the simple and replace the gas cap with a dealer OEM not a after market. If that does not fix it then change the sensor as indicated with the P0452 code. You can get the sensor from Auto Zone and they can give yo the step by step instruction to get the job done. Good luck and keep me posted. 

Posted on Jun 29, 2009

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I have a 2002 chevy cavalier z24 4-door and when I start the car cold it surges to 1500-2000 rpms and then works it's way down to normal. Now my check engine light came on and showed the error code for...


Hi there!

Its normal for the car to idle in high RPM in the cold start and soon as it warms up then it will go down. I dont think you are having any problem. And the Code for the gas cap usually come on when the Cap been loose for a while or when you pump the gas with the car running or a bad cap, And now you need to clear the code. Good luck

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