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Po442 what does this mean - 1999 Cadillac DeVille

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It means there is a leak in the evaporative emission system . P0442 OBD II Trouble Code

Posted on Mar 18, 2015

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Posted on Jan 02, 2017

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What are the problems when it had diganostic codes of po 496 po 455 po442 and po121


po121 is throttle position sensor is out of range.po442 is emissions system leak detected small leak.po455 is same as po442 but large leak.po496 is high purge flow . Check all the vacuum lines plastic also cause one of them is broken.

Dec 08, 2017 | Cars & Trucks

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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.

Mar 01, 2015 | 2002 Buick Regal

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What does po442 code on a 1999 pontiac grand am 3.4 v6 mean



Trouble Code: P0442

EVAP System Small Leak (0.040") Detected
Possible Causes:


Charcoal canister is loaded with fuel or moisture . Fuel filler cap is loose, cross-threaded, damaged or wrong part . Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking. Fuel tank pressure sensor is damaged, disconnected or it failed. Fuel tank vapor line(s) is clogged, damaged or disconnected. Purge valve vapor line is clogged, damaged, or disconnected. Purge solenoid or Vent solenoid has a small leaking (sticking.) PCM has failed . TSB 01-06-04-007A contains a repair procedure for this code.

Jul 28, 2012 | Pontiac Grand Am Cars & Trucks

1 Answer

What is the code po442 and po445 mean on the car


P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). The loose fuel tank filler cap is the most common cause that triggers the P0442 code.

Code P0445 indicates that there is improper purge flow in the EVAP system caused by a shorted purge valve.

Make sure Fuel tank cap is tightened well, then have it tested at Autozone, etc... If ok, then go back to inspection station.

Jan 20, 2018 | Cars & Trucks

1 Answer

Code po44o for a chevy s-10 pickup


this is a evaporative emissions code. which means there is a leak in the piping or something leading to the gasoline tank that is allowing fuel vapors to escape. More often than not the gas cap isn't tight or needs to be replaced. try these first

May 08, 2011 | 1998 Chevrolet S-10 Pickup

1 Answer

What does codes po442,po442pd and po742 mean


po442= evap emission control system leak (small)
po742= torque converter clutch soleniod circuit stuck on
i got these out of the booklet for my code reader po442pd wasn't listed

May 08, 2010 | 1999 Chevrolet Lumina

1 Answer

Engine coad po442 how do i fix it


PO442 is the data trouble code for (evaporative emission control system leak detected "small leak") it means that the OBD-II system has detected a small vacuum leak in the evaporative control system.

You will need to find the vacuum leak in the evaporative control system, check for cracked or broken vacuum lines and hoses, especially the vacuum hoses and lines around the evaporative (Evap) canister and the (Evap) solenoid. Also check the gas cap seal for damage.

Vacuum hoses and lines should be checked very well for any cracks or breaks, because they usually hide under the vacuum line or hose.

May 02, 2010 | 2001 Dodge Durango

1 Answer

My check engine light on my 2001 hyundai accent gl reads code po441, po442. What does these codes mean?


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

Jan 10, 2010 | 2001 Hyundai Accent

1 Answer

Diagnostic code PO442


PO442 is an Evaporation Emission leak. It's probably a loose gas cap. The fix would be $96.00 at our dealership, since your truck is out of warranty. You may be able to get it fixed cheaper, but you'll be charged a diagnostic fee.

Jun 24, 2008 | 2002 Mazda Protege

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