Question about 1996 Chevrolet Cavalier

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I got code P0440 (Evap Sys) on an Oldsmobile Aurora 1998 4.0 Engine What should I be looking for?

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Posted on Jan 02, 2017

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SOURCE: p0440 troble code

it should be located near the radiator, check for clogs find the hot compressor line and trace it to find it :) they can be hidden in many places but its usally locaed near the radiator as thats where all the air flow and exchange happens hope this helps

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if you need more help or if you can send pics i will try to help as best as i can

Posted on Jun 13, 2008

  • 883 Answers

SOURCE: 1997 oldsmobile aurora

rate me fixya!

Posted on Jul 11, 2008

  • 147 Answers

SOURCE: Check engine light on. Code P0440.

wow thermostat >>>> shucks i believe its evep emissions code like faulty gas cap can reset any computer the chck eng light will come on in 50 to 100 miles if not fixed....

Posted on May 08, 2009

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SOURCE: 2002 chevy trailblazer what does EVAP Emission

most p0440 codes are related to gas cap problem check cap and reset code if it the problem code pops problem with a fuel line follow lines from filler neck down and under vehicle[ look for smell of gas or cracked line] all the way up to throttle body if have leak fix asap

Posted on Sep 26, 2009

  • 1 Answer

SOURCE: Got error codes P0440, P0440 (pd), and P0442 which

It is probably a sensor that goes by the gas tank. I belive it is called a Fuel Vent Sensor Circuit. That should fix the problem.

Posted on Dec 16, 2009

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What will cause a p0440 code to appear on 2000 chevy silverado?

What engine does it have ?
Engine Controls - 4.3L
Engine Controls - 4.8L, 5.3L, and 6.0L
DTC P0440 Evaporative Emission (EVAP) System
Circuit Description
The evaporative system includes the following components:
• The fuel tank
• The evaporative emission (EVAP) vent solenoid
• The fuel tank pressure sensor
• The fuel pipes and hoses
• The vapor lines
• The fuel cap
• The evaporative emission canister
• The purge lines
• The EVAP purge solenoid
The evaporative leak detection diagnostic strategy is based on applying a vacuum to the EVAP system and monitoring the vacuum decay rate. The vehicle control module (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 a malfunctioning EVAP purge solenoid 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.

Apr 27, 2018 | Cars & Trucks

2 Answers

Why is engine light on ?

The 506, 171, and 1582 codes could be due to carbon buildup in the throttle body. Use throttle body cleaner to remove the carbon build up and retset codes. The 0440 code is the evap system code. This is usually a loose or worn out fuel cap.

Aug 23, 2014 | 1999 Volkswagen Beetle

1 Answer

P0440 parts

Evap system leak. Usually a bad gas cap, replace with an OEM part, not the cheap ones at the parts store. Also remove any rust, debris or varnish from filler neck where the gas cap screws onto with fine steel wool, be careful not to scratch it up or get stuff into the neck. Otherwise, there is a leak in the evap (fuel reclaiming unit), check all gas tank and evap system hoses for leaks or cracks.

Jul 17, 2014 | 1998 Oldsmobile Silhouette

1 Answer

1998 Buick Park Ave with trouble code p0440

Trouble code p0440 may be a simple as an improperly replaced gas cap, or a crack in one of the evap hoses.
Have the code cleared, if it comes back, find a shop that will do a "smoke test" to find the bad evap hose, and have it replaced.

Jun 16, 2010 | 1998 Buick Park Avenue

1 Answer

1999 Oldsmobile Aurora SES Light

evaporating emission contol system

Apr 06, 2010 | 1999 Oldsmobile Aurora

3 Answers

What is a p0440 problem?

Hi there,

Oldsmobile code P0440 refers to: Evaporative Emission System

This means there is a problem with the Evap System, and you will need to inspect the related components:

- Purge Solenoid:

Related Symptoms
  • Stalls after start with a hot engine
  • Poor Fuel economy
  • Emission related faults
- Evap Canistor: Check evap canistor for loose carbon.

- Evap Canistor Vent Valve:

Related Symptoms
  • Poor fuel economy
  • Stalls after start
  • Emissions related failure DTC codes
Hope this helps...


Nov 12, 2009 | 2001 Oldsmobile Alero

1 Answer

2001 corolla chack engine light on.

P0440= Evap Control Sys Malfunction
P0441= Evap Control Sys Purge Flow Fault
P0446= Evap Control Sys Vent Ckt Malfunction

Mar 30, 2009 | 2001 Toyota Corolla

1 Answer

Codes P0440 and P0300

the evap can simply be the gaz cap the 300 check for a good spark you may need wire and plug be carefull for those coil they offent defect good luck pierre

Jun 21, 2008 | 1998 Chevrolet Cavalier

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