Question about 2002 Buick Century

2 Answers

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

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Buick Master
  • 17,970 Answers

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


location of sensor for troubleshooting po442 to - 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.

Posted on May 11, 2010

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 110 Answers

Code 442 is small evap leak, check gas cap.

Posted on May 11, 2010

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Engine light on


that is the evap sensor failure. it can be multiple things. gas cap allows it to come on sometimes. delete the cel and see if it comes back on. if it does it can be the evap sensor located on top of fuel tank, thereis a charcoal filter located in there somewhere that filters the gas fumes before it exits into the environment. with the work involved to drop the gas tank and everything, it is easier to replace all of it once you have it apart. that way you dont just change the sensor and put it all back together and it be something else.

Jun 19, 2014 | 2002 Nissan Altima

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

2 Answers

Engine light on code po442


Problem with one of the oxagen sensors,

Nov 04, 2012 | 2004 Jeep Grand Cherokee

1 Answer

Check engine light on. Won't stay off. OCD code is po442 po128 coolant.


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!

Nov 03, 2011 | 2003 Chevrolet TrailBlazer

2 Answers

Check engine light on Gm code P0442


CODE PO442 EVAP SYSTEM SMALL LEAK DETECTED CONDITIONS.POSSIBLE CAUSE- LOOSE OR DAMAGED GAS CAP-FUEL TANK PRESSURE SENSOR IS DAMAGED-.FUEL TANK VAPOR LINE LINES IS CLOGGED OR DAMAGED DISCONNECTED-.PURGE VAPOR LINE IS CLOGGED DAMAGED DISCONNECTED.-PURGE SOLENOID OR VENT SOLENOID HAS A SMALL LEAKING STICKING - PCM HAS FAILED.

May 28, 2010 | 2004 Chevrolet Colorado

1 Answer

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

1 Answer

Engine light is on had autozone check on computer the code is po442? what is this ?


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 .

Nov 25, 2009 | 2001 Chevrolet Silverado 1500

1 Answer

Check engine light on troubleshooting code PO442 for a 1999 Hyundai Accent


hi my name is pete glad to help code p0442is indication an evap emission <small leak > your car is ok to drive but would not pass the smog test i would advise you get a pro to sort this as the code dose not tell you where the leak is i know the canister close is located under the vehicle next to the canistertank good hunting

Nov 18, 2009 | 1999 Hyundai Accent

1 Answer

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.

Nov 18, 2009 | 1999 Hyundai Accent

1 Answer

Check engine light on and Troubleshooting code is P0116


Hi, I managed to find a graphic illustration of the ECT sensor.
02c7b2a.gif

Good luck!

Dec 15, 2008 | 1999 Volvo V70

Not finding what you are looking for?
2002 Buick Century Logo

3,237 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts

yadayada
yadayada

Level 3 Expert

75744 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8123 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...