Obd code p0442

Evaporative Emission Control System Leak Detected (small leak) What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to many OBD-II equipped vehicles. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.

The code indicates a small leak in the evaporative emissions, or EVAP, system, which is commonly caused by a loose gas cap or a small hole in the cap. Video a quick little diagnosis. This code number references a number that is given to you when you plug your truck into a OBDII scanner.

A gas cap is the first thing to check in this case. Sometimes a gas cap may look OK, but when tested on a special tester it could show a leak. This indicates that a portion of the EVAP control system is no longer functioning properly. These codes are from PowerTrain series (P0XXX, P2XXX, P34XX), Body Series (B0XXX), Chassis series (C0XXX), Network series (U0XXX, U2XXX, U3XXX). By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them.

I replace the fuel pump, gas cap, evap canister vent solenoid. EVAP system in the Leak Test Refer to Monitor Test. To perform the test the computer energizes the vacuum management valve (VMV) vent valve.

It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0. When the system is seale a finite amount of pressure or vacuum will be observed. It may need further testing.

In order to troubleshoot any of the GM EVAP codes, it’s important to understand how the system works. The evaporative emissions system is designed to prevent raw gas vapors from entering the atmosphere. I want to fix this myself and not pay hundreds of dollars. Most commonly is a gas cap, but already changed that with a motorcraft cap and still came back. I have replcaed the gas cap and the code is still there.

Is there a way to reset the codes and see if the gas cap was the root cause?

This is most commonly done by either drawing a vacuum on the fuel system or by letting a vaccum occur naturally during cool-down. Alright, so I have and OBD code for an evap leak AND the check fuel cap light on. Changed fuel cap about months ago with same code which fixed issue. Jeep Grand Cherokee Vacuum Leak.

Decided on TOAD OBDscanner. It reads OBDII , including CAN format. I’ve only used it once to date, but it told me everything I needed to know and more. Small leak in the emission system.

As was suggested elsewhere in this forum, replaced the fuel tank (gas) cap with an new KIA factory cap and the problem has gone away. I plan on getting a new gas cap, some people say it could be address and other required details in the form below. I had to re-tightened the gas cap and manually remove the code and been driving the truck for over days (100)Miles and nothing has popped up. Two or Three years back I received this same code and a friend at the dealer ship mentioned to me about a common problem related to this which was fixed by changing out the Vent Valve located on the back end of the fuel tank. First thing to check was the gas cap.

I tightened the cap, reset the codes and kept driving. Interestingly enough I read this writeup about a year or so ago and thought, How ingenious. Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder. I reset the system and today drove maybe miles - light came again and code is the same.

GM replacements, had the code cleared and it was fine and went away. Has anyone run into this and if so, any suggestions on fixing the problem. Thanks in advance for any help.

You may need a new catalytic converter or sensors. Advance Auto pulled out the. Check engine light came on yesterday.

Actron Diagnostics offers a code look up tool for your automotive diagnostic and scan tool needs. Ford Motor Company Driving Cycle. Evaporative leak codes can be caused by broken fuel vapor lines, gas tank seals leaking, EVAP canister cracke etc.

EVAP codes can be some of the most difficult fault codes to diagnose. Mercedes-Benz Fault Code List. I cannot guarantee 1 accuracy nor can I be liable for any damage one can cause to his or her car or self.

Manufacturers may not follow these, but most do. Diagnostic Trouble Codes (DTCs) are recommendations not a requirement. Mazda Specific OBDII Trouble Codes. I am considering going to a mechanic to get a proper diagnosis. Welcome to our OBD Codes Home Where you can find codes for all of your car and trucks.

The OBDII socket in later Diablos is located on the drivers side foot well on the right side of the steering wheel column. The socket is the same on all cars and will fit all OBDII readers (see fig. 4).

OBDII and Emissions Testing - An Article from the OBDII Technical Library. OBD II AND EMISSIONS TESTING.