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What is a p0440 problem? - 2001 Oldsmobile Alero

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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...

Cheers,

Posted on Nov 12, 2009

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Evaporative emission control system malfunction

Posted on Nov 12, 2009

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It could be as small as a bad fuel cap. But other things to consider that can cause this code is evap vent solenoid,purge valve, o ring on fuel sender assembly,canister,plugged lines on evap system, fuel tank pressure sensor.I would start with gas cap which at most times is the cause of this code

Posted on Nov 12, 2009

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P0440 EVAP System No Flow can occur during the following conditions:
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