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Getting check engine code of PO442, what can that be?

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Posted on Jan 02, 2017

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SOURCE: engine light is on had autozone check on computer

this is an evap system code, indicating a problem in the system that circulates the gasoline vapors in your fuel system. most common causes are a loose or defective gas cap, or the solenoid located tucked under the left rear bumper. this code will not cause any problems if you continue to drive .

Posted on Nov 25, 2009

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keeperoffire
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SOURCE: Check engine light-code-po442

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

SOURCE: Check engine light on. Won't stay off. OCD

Just fixed mine with the same code and gm tech advised me to change thermostat which is not a fun job as it is located in the LOWER hose and comes with a gooseneck assembly and O ring.The temp sensor could also be the problem but was told not likely so got by with just thermostat!

Posted on Dec 10, 2011

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1 Answer

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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Po442 engine code check engine light on, where do I look for the trouble?


If u know what the code is U can get a hanes Repair manual at any auto pats stoe and usuall section 6-6 onwadrd will show all code numbers ad what they mean.

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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

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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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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.

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if the air filter was recently inspected or changed, look for the vacuum hose to be disconnected from the valve located on the air filter cover. another source may be the gas cap either loose or with the tether strap caught under it preventing a proper seal

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