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Problem for Chevrolet 2000 Tahoe

I have a 2000 tahoe

By kentzittlau on Nov 04, 2009

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I have a 2000 tahoe with a 5.7 litre. On a long drive the engine light came on. When I continued to drive, it had a sound like the A/C kept drawing power from the engine but this was only intermittent and barely noticeable. The following day it started with trouble and then the next day it would not start; battery power is strong. Diagnosing the code from the digital reader comes up with a code P0440 which is a generic emmissions number. Any ideas where to go from here?

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Solution #1

posted on Nov 04, 2009

bschilz

Rank: Guru Chevrolet

Expert
Rating: 87%, 729 votes

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

With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:

Remove and reinstall the gas cap, 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
Have a professional use a smoke machine to detect leaks

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Solution #2

posted on Nov 04, 2009

roniecon

Rank: Guru Chevrolet

Expert
Rating: 88%, 741 votes

I would check out the smog pump,it is most likely ting to lock up.About 118.00 at N A P A

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This Problem Also Relates To: 1999 Chevrolet Silverado 1500 2004 Chevrolet Cavalier 2000 Chevrolet Cavalier 1994 Chevrolet S-10 Blazer 1996 Chevrolet K1500 1999 Chevrolet S-10 Pickup 2002 Chevrolet Impala

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