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Check engine light-code-po442 - 2002 Chevrolet TrailBlazer

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  • Anonymous Mar 25, 2009

    check engin light stay on



  • Anonymous Mar 21, 2014

    engine service code po442

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  • 106 Answers

This is an emmissions code that says there is a leak in your evaporative system.I would start by changeing the gas cap.

Posted on Mar 04, 2009

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Molson02536
  • 3854 Answers

SOURCE: check engine light code PO442

You likely won't notice any drivability problems. P0442 indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. 
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.

With a P0442, the most common repair is to Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back. Otherwise, replace the gas cap, or Inspect the EVAP system for cuts/holes in tubes/hoses.

Good luck and hope this helps

Posted on May 07, 2009

SOURCE: 2001 Dodge Caravan/check engine light

Leak in evap, most of time the gas cap was not put back on.

Posted on Aug 25, 2008

  • 1201 Answers

SOURCE: Troubleshooting code PO442 check engine light on

The code PO442 is a small leak somewhere in the evaporative emissions control system, the best way to find that is to take to a shop that does smoke tests for emissions.
As far as the nozzle, try changing the position of it the next time you get gas.

Posted on Nov 18, 2009

ajarema
  • 404 Answers

SOURCE: my check engine light on my 2001 hyundai accent gl

Most of the time they mean:
p0441 = Evaporative Emission System Incorrect Purge Flow
p0422 =
Evaporative Emission Control System Leak Detected (small leak)

MOre info at http://www.obd-codes.com/p0442

Posted on Jan 10, 2010

redbeard00
  • 957 Answers

SOURCE: check engine light comes on with codes PO401 &

P0401 sets when EGR flow test runs and fails. EGR may be moving too slow or not at all. May be a bad connection.
P0442 sets when vacuum decay test indicates small leak in the EVAP system detected during diagnostic test. Check for a loose or defective gas-cap. If the cap is fine it may be a false code or could be related to another EVAP component.

Posted on Apr 27, 2010

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As far as the nozzle, try changing the position of it the next time you get gas.

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