Question about 2001 Chevrolet Cavalier

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Yellow emission engine light comes on

The yellow emission engine light comes on.It reads a code of 442 for a small emission leak. What things should i check for a leak and where are they?

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  • CHEVY46 Oct 26, 2008

    Thanks, but I tried that. Any other ideas?

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To find a leak in a vapor hose, you may need a leak detector that uses smoke and/or dye. A 0.020" hole is the size of a pin. it can be a pain to find .This is about the best alternative. You will probably need a mechanic for that.

Posted on Nov 16, 2008

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Is that P0442?, if so it may be due to a loose gas cap or leaking gas cap check valve.

Posted on Oct 15, 2008

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1 Answer

2010 mini evap emission control system leak code 442


This is code for a small leak. You need a smoke test to find it. Call around to shop having this special tester.

Sep 04, 2012 | 2010 Mini Cooper Hardtop

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Check engine light code reads 442. What should I check


DTC P0442 - Evaporative Emission Control System Leak Detected (small leak)
This 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. You likely won't notice any drivability problems.

A code P0442 most likely means one or more of the following has happened:
- A loose or improperly affixed gas cap
- A non-conforming gas cap (i.e. not factory/original brand)
- A small leak/hole in a fuel vapor hose/tube
- Other small leak in EVAP system
- Faulty vent o-ring seal


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

Hope this helps; remember to rating this answer and leave a testimonial comment. Thabk you for using Fixya.

Oct 14, 2011 | 2006 Buick LaCrosse

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Have OBD codes P2A00, P0441, P0442, P0446 on my 2003 Highlander. Selling the car in a few months. Does this really need to be repaired before trade-in? Can I just erase the codes?


NOPE CANT ERASE CODES UNTIL THE PROBLEM IS FIXED OR THE SERVICE ENGINE LIGHT SOON WILL STAY ON. CODE PO441 - EVAPORATIVE EMISSION EVAP SYSTEM INCORRECT FLOW DETECTED.CHECK INTAKE VACUUM HOSE CONNECTIONS AT THE EVAP CANISTER PURGE VALVE.IF ALL IS GOOD.THE EVAP CANISTER PURGE VALVE COULD BE BAD. CODE PO 442 - EVAPORATIVE EMISSION EVAP SYSTEM SMALL LEAK DETECTED. EVAPORATIVE EMISSION SYSTEM LARGE LEAK DETECTED FUEL CAP LOOSE OR OFF MISSING. CODE PO 446 - EVAPORATIVE EMISSION EVAP SYSTEM VENT CONTROL CIRCUIT MALFUNCTION.

May 21, 2011 | Toyota Highlander Cars & Trucks

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Location of sensor for troubleshooting po442 to cause check engine light to come on


P0442 OBD-II Trouble Code - Evaporative Emission Control System Leak Detected (small leak)

What does that mean?
This 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.


Symptoms
You likely won't notice any drivability problems.


Causes
A code P0442 most likely means one or more of the following has happened:
* A loose or improperly affixed gas cap
* A non-conforming gas cap (i.e. not factory/original brand)
* A small leak/hole in a fuel vapor hose/tube
* Other small leak in EVAP system
* Faulty vent o-ring seal


Possible Solutions
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


46b629a.jpg

Fig. EVAP vent solenoid (2) on 3.1L, 3.4L, 3.5L & 3.8L, showing the connector (1) and vapor line (2)


510065b.jpg

Fig. EVAP canister purge solenoid location on 3.1L & 3.4L


a193655.jpg

Fig. EVAP purge solenoid valve (3) location on 3.5L




Hope this help, good luck.

May 11, 2010 | 2002 Buick Century

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I have a 2003 Chrysler Voyager mini van and the engine light is on and it's running rough. I'm getting several error codes from the engine light. PO351, PO300, 301, 304, PO442 and PO455.


wow a lot of codes, lets start with them....

P0351 ignition coil A primary/ secondary curcuit

P0300 random misfire detected

P0301 Cylinder 1 misfire detected

P0304 Cylinder 4 misfire detected

P0442 Evaporative emissions leak detected (small)

P0445 Evaporative Emissions System Purge control valve circuit shorted

I guess the first thing i would do, is insure that all the maintenance on this vehicle was up to date. Do an oil change and a tune up. Make sure you use decent spark plugs as a fouled plug or bad oil could cause a misfire. After you do the tune up, try running it some more, if the problem persist, you may end up having to replace the coil.

The evaporate emission leaks. These, especially the the 442 can be either a loose gas cap or a small leak in the vacume system. Insure the cap is tight passed several clicks and listen the the motor as it runs and try to hear any leaks. If you find a leak replace the faulty lines. Also inspect the vacume line for cracks and breaks.

Wish you luck, we are hear if you need more help. Thanks for coming to FixYa!!



Mar 26, 2010 | 2003 Chrysler Voyager

1 Answer

Where do I find Emission control systemin in engine compartment


unless u have delt with thease problems before u will have to take it to the shop to have it smoked but the first thing i would do is replace the gas cap

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Check all of your EVAP lines and the charcoal canister. Also check the lines and overflow line from the gas cap to the gas tank.

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Yellow emission light


To find a leak in a vapor hose, you may need a leak detector that uses smoke and/or dye. A 0.020" hole is the size of a pin. it can be a pain to find .This is about the best alternative. You will probably need a mechanic for that. I responded to this on your other post.

Oct 26, 2008 | 2001 Chevrolet Cavalier

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