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1998 Chevrolet Cavalier code po440

Failed emissions testing-replaced gas cap. light still on

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: abs and hand brake light

Check your master cylinder switch in the res. is not stuck down. When started is the light off until you go over 15 mph? If so check your abs relay. Good luck

Posted on Aug 03, 2008

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SOURCE: Where is the thermostat on a 1998 Chevrolet Cavalier?

there probably isn't a radiator cap. some cars only have a cap on the resivior tank. if your coolant is low, it'll show in that tank. follow your upper radiator hose to engine. thermostat should be at the end of it, depending on what engine you have

Posted on Dec 01, 2008

localwonder
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SOURCE: 2000 cavalier check engine light code po440

P0440 - Evaporative Emission (EVAP) System


evaporative emission (EVAP) system has a large leak.
Check the gas cap or vent valve. these are the most common problems.


The Powertrain Control Module (PCM) at different times performs various tests on the EVAP system. OBD II Enhanced EVAP systems are in place to keep fuel tank vapors from venting into the atmosphere, and instead purges them into the engine to be burned. Regular pressure tests are conducted by the PCM to monitor the sealed system for leaks. The PCM monitors the EVAP system pressure by watching the Fuel tank pressure sensor (FTP). When the sensor indicates a small leak in the EVAP system, this code is set.


Here are some additional causes.

* A small leak in any of the EVAP hoses or fuel tank hoses
* A small leak in the purge valve or vent valve
* The EVAP Canister may be leaking

Posted on Jun 06, 2009

  • 3640 Answers

SOURCE: 1999 Chevrolet Malibu Code PO122 problem

po341 is camshaft position sensor A bank 1 ckt range/perf and po122 istps/pedal position sensor A curcuit low input this is throttle position switch on side of throttle body!

Posted on Jun 17, 2009

  • 3640 Answers

SOURCE: i get a po440 and a po440 pd code

evap emission control system malfunction, po440

Posted on Aug 26, 2009

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1 Answer

Evap emission system


Have same problem with my 2002 Silverado. Changed purge valve. Still no luck. There is a fitting for forcing smoke into fuel system to find leaks. I checked out a friends Trailblazer (same code) Someone stole his gas cap. Bad gas cap can also cause this code. You can ignore this code. It does not have any effect on engine performance, but if you have to pass emision test must be repaired

Apr 23, 2013 | 1998 Chevrolet Cavalier

1 Answer

PO440 GMC SIERRA NOT ENOUGH VACUUM


No idea, why you or anyone would buy any parts

You have to diagnose & find the problems with vehicles,
& then only after you know how to component test, do you
replace a part that fails a test

Now you need to Evap Smoke Test the system, to find the leak
or failed component

Apr 05, 2013 | GMC Sierra 1500 Cars & Trucks

2 Answers

Po 440 code check engen


p0440 is an evaporitive emission system system large leak detected generally on an 02 gm vehicle it is very common that the vent solenoid located by the fuel tank if you replace it the light will take a few days to clear its self. the vehicle runs tests on all sensors and systems and the test has to pass or fail a number of times before the pcm will turn on or turn off a check engine light.

Dec 20, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

Check engine light is on- reason- Evap emission control system malfunction- code PO440


Causes: 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

Possible Solutions: 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

Hope helps (remember to rate this).

Oct 12, 2010 | 2002 Chevrolet Blazer

1 Answer

2003 monte carlo ss po440


you will need to drive about 50 miles till the computer checks the system since it was reset. Your check engine light may come back again, if it does run a vacum test..

Jul 23, 2009 | 2003 Chevrolet Monte Carlo

2 Answers

I get a po440 and a po440 pd code


evap emission control system malfunction, po440

Jun 23, 2009 | 1998 Chevrolet Malibu

3 Answers

2000 cavalier check engine light code po440


P0440 - Evaporative Emission (EVAP) System


evaporative emission (EVAP) system has a large leak.
Check the gas cap or vent valve. these are the most common problems.


The Powertrain Control Module (PCM) at different times performs various tests on the EVAP system. OBD II Enhanced EVAP systems are in place to keep fuel tank vapors from venting into the atmosphere, and instead purges them into the engine to be burned. Regular pressure tests are conducted by the PCM to monitor the sealed system for leaks. The PCM monitors the EVAP system pressure by watching the Fuel tank pressure sensor (FTP). When the sensor indicates a small leak in the EVAP system, this code is set.


Here are some additional causes.

* A small leak in any of the EVAP hoses or fuel tank hoses
* A small leak in the purge valve or vent valve
* The EVAP Canister may be leaking

Jun 06, 2009 | 2003 Chevrolet Cavalier

1 Answer

My car wont pass DEQ. 2001 Cavalier 2.2L Everything is ready but the Evap system. No codes now. It was showing PO440 but now nothing and it still wont pass. Please help


Replacing the gas cap most likely will solve your problem. Make sure the cap clicks three times when you turn it or it will not seal.

Apr 22, 2009 | 2003 Chevrolet Cavalier

2 Answers

2002 Chevy Trailblazer w/101,000 mi has the P0440 OBD II Code. Just replaced the plugs with Iridiums @ 100K, all connections are good and gas cap is seated properly . . . help!!!


i have 2003 trailblazer ltz 153 000 mileage i have code po440 .i changed gas cap and turned off the chech engine light... i made 300 miles and it was good and today morning i drove a mile and light turned on ..... what do i have to fix ...thanks

Mar 22, 2009 | 2003 Chevrolet TrailBlazer

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