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Engine code po442 - Cars & Trucks

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Code P0442 refers to the E-VAP system. A small vacuum leak is detected and it could be the result of a loose, missing, or defect gas cap. There could be another problem in the system too. This is a good start. Let me know if if there is anything else, good luck.

Posted on Mar 03, 2014

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Posted on Jan 02, 2017

Molson02536
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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

  • 2 Answers

SOURCE: Code PO442 & PO455 on a 2003 Dodge Caravan with 3.3 engine

The problem is most likely to be with your vacuum line they put cheap rubber hose for this purpose. You should find a diagram at the front of the vehicle trace the hoses by this diagram. You most likely will find a bad piece of hose.

Posted on Jul 20, 2009

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SOURCE: check engine lit on code po442,po445

I have a dodge stratus and the engine light is on and it drives and its as though someone stopped it with a grabbing sensation but its not the brakes they are not involved. i thought the pause and cut off was caused by the transmission but it not that either

Posted on Mar 30, 2010

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2002 Buick Regal Service Engine Soon light PO442 diagnostic code


That is an emissions code. It means you have a small leak in one of the lines. Most likely it the line that goes from the engine to the evap canister in the drivers side rear inner fender well.

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PO442


code p0442 refers to evaporative emission (EVAP) system--small leak detected====causes hose connection/s---intake leak--EVAP canister---EVAP canister purge valve
it also refers to evaporative emission system --large leak detected (fuel cap loose/ off)===causes---mechanical fault--hose connection/s--EVAP pressure sensor.

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PO442 --small leak somewhere in EVAP System

Make sure the gas cap is on tight

Otherwise have the evap system smoke tested
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1 Answer

Engine light on. Codes PO455 and PO442?


There is a pretty good emissions leak somewhere.

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Check engine lit on code po442,po445


I have a dodge stratus and the engine light is on and it drives and its as though someone stopped it with a grabbing sensation but its not the brakes they are not involved. i thought the pause and cut off was caused by the transmission but it not that either

Mar 29, 2010 | 2001 Dodge Stratus

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Troubleshooting code PO442 check engine light on. When I put in gas, gas nozzle keeps cutting off like tank is full


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.

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1 Answer

Failed Emision test


po442 is evap emission control system leak (small) 1 of the lines for emissions is leaking. po455 is-- emission control system leak (large). turn off light with code scanner after it is fixed.

Sep 01, 2009 | 2001 Dodge Caravan

2 Answers

Code PO442 & PO455 on a 2003 Dodge Caravan with 3.3 engine


The problem is most likely to be with your vacuum line they put cheap rubber hose for this purpose. You should find a diagram at the front of the vehicle trace the hoses by this diagram. You most likely will find a bad piece of hose.

Mar 14, 2009 | 2003 Dodge Caravan

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