Question about 2003 Buick Century

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2 po442 codes showing up on my 2003 buick century

One is for small evap leak and 2nd is some control or something related to evap leak changed gas cap and still came back on

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  • Anonymous Mar 28, 2014

    wount pass emishion and smells like gas wen running also the engion will run low wen running

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If there was a leak at the gas cap. EG: Left off or loose after fill up? You will need to have the codes cleared or it will clear itself after enough key cycles. EG: Started and shut back off as many as 20 to 50 or more times.

Posted on Jun 01, 2009

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2 Answers

Po442 code reader


no nothing to do with transmission ---its an evap code small leak detected this is the usual check gas cap that its on and tight or replace because seal is shot but the following link explains the other problems with assistance in helping repair problem
http://www.obd-codes.com/p0442

Jul 25, 2016 | 2000 Honda Passport

2 Answers

Po442 code for 2002 grand caravan


this relates to a slight leak of fuel vapour to atmosphere from the EVAP system , to check undo and refit gas tank cap and clear code , then drive for a day and rescan for code , if reappears then the EVAP system will need inspecting for leakage

Jun 02, 2015 | Cars & Trucks

1 Answer

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.

Jun 14, 2014 | 2003 Toyota ECHO

1 Answer

What does PO442 and PO463 codes mean


PO442 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.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
P0463 Fuel Level Sensor Circuit High Voltage

Jan 26, 2012 | 2002 Cadillac Deville

2 Answers

How do you replace 98 Buick century evap emission control system


If you are getting a code saying that there is a problem with your evaporative emission control system, it is often related to the gas cap. In many cases replacing the gas cap will fix the problem.

May 04, 2011 | 1998 Buick Century

2 Answers

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

1 Answer

Check engine light comes on with codes PO401 & PO442 where these sensors are its a 1998 buick century


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.

Feb 18, 2010 | 1998 Buick Century

1 Answer

Engine codes for 2001 Chrysler Sebring P0442 455 and 1685


PO442 means you have a small leak in your EVAP system. Most common cause is a bad gas cap, replace the gas cap with a factory gas cap,after market fail or does not conform to the OEM EVAP system. Other cause would be small leaks in the EVAP vacuum lines. P0445 is also related to the EVAP system and has detected a large leak in the system. Start with the gas cap as mentioned above. P1685 Is an issue with the ignition not recognizing the ignition keys and the car's ignition immobilizer my activate leaving the car not being able to start. That's going to have to be a Dealer repair. Good luck and hope this helps.

Jun 15, 2009 | 2001 Chrysler Sebring

1 Answer

98 buick regal ls - po442 obd code


Usually the source of the leak is the gas cap (either loose or defective) but if that doesn't apply to your issue then the canister is next to the gas tank.

Jun 09, 2009 | 1996 Buick Regal Olympic Gold

1 Answer

Trouble code po442


P0442 onepx.gif EVAP System Small Leak (0.040") Detected


EVAP fuel tank or canister vapor hoses leaking or damaged
EVAP system component leaking, damaged or has failed
Fuel tank cap is loose, or the cap release pressure is incorrect
Leak detection pump damaged or leaking

You can try the gas cap first, if that does not help you will need to take it to a repair shop, Small leaks are very hard to find. If you want to know what turns on the light here it is.

Cold engine startup (ECT sensor from 40-90�F and within 10�F of the BTS input at startup), fuel level more than 1/2 full, engine running, EVAP leak test "on", and the PCM detected a leak greater than 0.040� but less than 0.080" somewhere in the system.
This code sets in 2 Trip(s).

Nov 04, 2008 | 2003 Jeep Grand Cherokee

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