Question about 2001 Chevrolet Tracker

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Obd code po 440

We keep getting the code for evap system malfunction. everything checks out fine and car even passed inspection. its a 1999 chevy tracker. light will stay off for over 600 miles and come on for no apparent reason. we have bought new gas cap and tightened all hoses, where do we look now?

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  • Anonymous Mar 19, 2014

    my ecm is causing my car to malfunction with the power steering and other electrical things within the car. also if the ecm isn't the cause of the power steering having malfunctions then there is something wrong with the system. ive had the car look at by many shops and they can't find anything wrong with it in general. i have been told to just drive my car until something very major occurs; which in my case the car has had so many close encounters of on head collisions with cars and other varies things. now my check engine light is coming on which in result is causing my car to sputter and certain things not to work. i just changed the spark plugs and wires my husband keeps the car running great honestly; as to the battery light constantly coming on at certain speeds i just bought a new battery not to long ago. so the big question i must have for you is what is going on with my car. i honestly just cant take it to the chevy dealer and say fix it im not made of money, and i most certainly cant keep driving the car with it honestly having these issues cause my gas millage is horrible it is sucking gas like something awful. I feel i keep fixing replacing things on here just to turn around to do something more to the car. any thing you can help me with or direct me with?

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Problem not solved. its a 1999 chevy tracker not a 2001.

Posted on Nov 15, 2008

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Http://www.obd-codes.com/p0440 you may find the answer here or at least what to check. It sounds like the code is intermittent which probably means something is going out just has not yet. My guess is you may have a leak in a hose( maybe a split or crack in hose)

Posted on Dec 07, 2008

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Toyota echo won't start code 440 441 446


Error Code: P0440
Fault Location:
Evaporative Emission (EVAP) System - Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Soution:
Check Evaporative Emission (EVAP) System Sealing.
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .

Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Solutions:
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Perform Output Test.
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .
Check Evaporative Emission (EVAP) Canister.
Perform Basic Setting.
Check Pipes between Tank Breathing and Throttle Body.

Error Code: P0446
Fault Location:
Evaporative Emission (EVAP) System, Vent Control - Circuit Malfunction
Possible Cause:
Wiring harness.
Evaporative emission (EVAP) canister purge valve.
Engine control module (ECM).

Feb 25, 2013 | 2002 Toyota ECHO

1 Answer

I have 5 po codes they are 132 141 341 342 and 440 Whats going on


oxygen sensors, purge canister (if has filter replace) pressure sensor gas tank. google OBD II Codes, will give you what triggers the code helpful for troubleshooting

Jan 02, 2013 | 1999 Pontiac Sunfire

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Engine codes PO 128, PO 440, PO 456 and PO 622


Trouble Code: P0128

Thermostat Rationality Test

Possible Causes:


Check the operation of the thermostat (it may be stuck open).ECT Sensor is contaminated, damaged or it has failed.Inspect for low coolant level or for an incorrect coolant mixture.Trouble Code: P0440

EVAP Purge System Fault

Possible Causes:


EVAP purge valve vacuum supply is leaking or clogged.EVAP purge valve is stuck closed.EVAP purge solenoid has failed.NVLD assembly (leak detection) is damaged or has failed.NVLD switch circuit is open or the NVLD switch has failed.Ground circuit is open.PCM has failed.Trouble Code: P0456

EVAP Small Leak (0.020") Detected

Possible Causes:


.EVAP fuel tank or canister vapor hoses leaking or damaged.EVAP system component leaking, fuel cap loose or missing.Leak detection pump damaged or leaking.Trouble Code: P0622

Generator Field Control Circuit Malfunction

Possible Causes:


Generator field control circuit is open or is shorted to ground.Generator field control circuit is shorted to system power (B+).Generator field ground circuit is open.Generator is damaged or PCM has failed.PCM has failed.Here are the codes and causes.

Nov 25, 2012 | 2002 Dodge Intrepid

1 Answer

PO440 code on a 1999 chev tahoe


P0440 - Evaporative Emission Control System Malfunction
This indicates that a part of the EVAP control system is no longer fuctioning 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 vehicle's 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.

Symptoms: You likely won't notice any drivability problems.

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

Check it and keep us updated.

Aug 13, 2011 | 1999 Chevrolet Tahoe

1 Answer

Have OBD codes P2A00, P0441, P0442, P0446 on my 2003 Highlander. Selling the car in a few months. Does this really need to be repaired before trade-in? Can I just erase the codes?


NOPE CANT ERASE CODES UNTIL THE PROBLEM IS FIXED OR THE SERVICE ENGINE LIGHT SOON WILL STAY ON. CODE PO441 - EVAPORATIVE EMISSION EVAP SYSTEM INCORRECT FLOW DETECTED.CHECK INTAKE VACUUM HOSE CONNECTIONS AT THE EVAP CANISTER PURGE VALVE.IF ALL IS GOOD.THE EVAP CANISTER PURGE VALVE COULD BE BAD. CODE PO 442 - EVAPORATIVE EMISSION EVAP SYSTEM SMALL LEAK DETECTED. EVAPORATIVE EMISSION SYSTEM LARGE LEAK DETECTED FUEL CAP LOOSE OR OFF MISSING. CODE PO 446 - EVAPORATIVE EMISSION EVAP SYSTEM VENT CONTROL CIRCUIT MALFUNCTION.

May 21, 2011 | Toyota Highlander Cars & Trucks

2 Answers

If the p0440 codes come up is the car still ok to drive 96 chevy blazer


Hi, P0440 indicates your computer is not getting a drop in fuel tank pressure when opening the evaporation system purge valve. This is not a safety issue, as the gas cap will release any excessive pressure, so you can still drive the car. The problem may be a leak in the evap system or a failed purge valve. Please let me know if you would like some troubleshooting steps or if you have other questions, and thanks for using FixYa.

Apr 22, 2011 | 1996 Chevrolet Blazer

1 Answer

I recently purchased this 1999 Chevy Blazer and it wont pass inspection because the OBD2 Diagnostic trouble code states it's problem is, code P0440-Evaporative Emission System. The guy said it looks like...


The evaporative leak detection diagnostic strategy is based on applying a vacuum to the EVAP system and monitoring the vacuum decay rate. The VCM monitors the vacuum level via the fuel tank pressure sensor input. At an appropriate time, the EVAP purge solenoid and the EVAP vent solenoid turn ON, allowing the engine vacuum to draw a small vacuum on the entire evaporative emission system. If a sufficient vacuum level cannot be achieved, a large leak or an EVAP system malfunction is indicated.

The following conditions can cause this problem:
* A disconnected or malfunctioning fuel tank pressure sensor
* A missing, malfunctioning, improperly installed, or loose fuel cap
* A disconnected, damaged, pinched, or blocked EVAP purge line
* A disconnected or damaged EVAP vent hose
* A disconnected, damaged, pinched, or blocked fuel tank vapor line
* A disconnected or malfunctioning EVAP purge solenoid
* A disconnected or malfunctioning EVAP vent solenoid
* An open ignition feed circuit to the EVAP vent or purge solenoid
* A damaged EVAP canister
* A leaking fuel sender assembly O-ring
* A leaking fuel tank or fuel filler neck

Any of the above conditions can set a DTC P0440.

Mar 08, 2011 | 1999 Chevrolet Blazer

1 Answer

I am getting P0440 EVAP Control System Malfunction for my Buick Century 1999 and need to know how to fix it thanks


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

Keep us updated.

Nov 15, 2010 | 1999 Buick Century

1 Answer

Is giving me PO 341 and a PO 440 and my


P0341-Camshaft position sensor malfunction.P0440-Evaporative emission system/EVAP/ malfunction.Check for air leak,hoses.If O.K. change EVAP canister purge valve.

Apr 20, 2010 | 1996 Volkswagen Jetta

2 Answers

Codes P0440 and P0300


Hi,

A quick Internet search on those codes pulled up the following info.
http://www.obd-codes.com/p0440
  • 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
http://www.obd-codes.com/p0300
  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer

Dec 12, 2008 | 1999 Chevrolet Cavalier

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