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2007 chevy cobalt 2.2. Code p0442 what are the common causes…

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2007 chevy cobalt 2.2. Code...
2007 chevy cobalt 2.2. Code p0442 what are the common causes for this code on this vehicle? Could a small gas leak set this code off?
Submitted: 4 months ago.Category: Chevy
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Answered in 3 minutes by:
3/7/2018
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 4 months ago
AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 28,147
Experience: ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
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Hello and welcome!

Thank you for your question. My name isCustomerand I will be happy to assist you today. I am reviewing the details now.

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Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 4 months ago

Here is the definition for this code.

P0442 EVAP System Small Leak Detected

Possible Causes

  • Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
  • Fuel filler cap is loose, cross-threaded, damaged or wrong part
  • Purge valve vapor line is clogged, damaged, or disconnected
  • Fuel tank vapor line(s) is clogged, damaged or disconnected
  • Charcoal canister is loaded with fuel or moisture
  • Fuel tank pressure sensor is damaged, disconnected or it failed
  • Purge solenoid or Vent solenoid has a small leaking (sticking)
  • ECM has failed
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Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 4 months ago

Based on my experience, this condition is most likely caused by a faulty purge valve, vent valve or evap line/hose leak. A common area to look for an evap leak is the accordion style EVAP line by the fuel tank for a small hole.

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Customer reply replied 4 months ago
I usually find vent valve
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 4 months ago

YES, that is very possible. There is also a PCM reflash for this code as per GM TSB 07-06-04-012

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Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 4 months ago

I am glad I can help! My goal is to give you the best experience possible! I hope I have earned a 5-star rating! Please remember to rate my service by selecting the 5 stars at the top of the screen before you leave today. If you need more assistance, please use the reply box and let me know.

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Customer reply replied 4 months ago
Small gas leak wouldn't cause it correct
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 4 months ago

That is Correct. This is an evap leak code.. not fuel leak code.

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Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 4 months ago

Hello there!

I am just checking in to see how things are going and to see if you need any further assistance?

If so, please let me know as I will be happy to help.

Best Regards,

Customer/p>

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