Error code p0442

This diagnostic trouble code (DTC) is a generic powertrain code , which means that it applies to many OBD-II equipped vehicles. 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.

Advertisement Autoplay When autoplay is enable a suggested video will automatically play. I plan on getting a new gas cap, some people say it could be address and other required details in the form below. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.

Either the vent or purge VMV valves may be faulty and leaking. Or, the fuel tank pressure sensor could be bad. SPEED Up Your PC - Free Scan Now!

Your symptoms are very similar to a vehicle experiencing problems with air metering, or fuel delivery. A clogged fuel filter may sometimes offer enough fuel for idle, but lack the volume to maintain an operating engine. Here are the code descriptions.

I would first inspect all vacuum hoses in the engine bay very closely, for loose hose ends and cracks or dryrotting. Check the vac and wiring connections by the air filter box. Had a code for fuel cap prior and replace cap and that code cleared. A large leak has been detected in the evaporative. Error Code PO 4S-Series General.

Blue Screen Xmp Profile PC Tools Registry Mechanic Windows 10. What are the symptoms on your leaks in the system. Getting the code while driving on the interstate and engine is warmed up. Dodge Dakota Club Cab 4x4. 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.

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? Answered by a verified Cadillac Mechanic We use cookies to give you the best possible experience on our website. Evaporative emissions are just what they sound like: emissions. The first step in the repair process was replacing the gas cap with a cap from the dealer.

Chevrolet Colorado, 4X Crew Cab, 3. Read emissions expert information and diagnostics for fault. It can be caused from something as simple as not tightening the fuel cap all of the way after fueling, or a leaky seal at the gas cap, or a leaky o-ring around a number of sensors and fittings in the emission system. 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.

I got this code last week. I cleaned the gas cap as well as put on a new one to see if that would clear it, both to no avail. I know this is for the evap system but I was wondering since my fuel float is stuck and I never get acurate readings on how full my tank is could this simply be the reason it is spitting out this code ? Hello, first time poster long time reader, very helpful site.

In other words, I had a leak somewhere in the myriad of plumbing that comprise the emissions system on a modern car. No check engine light back then. I want to fix this myself and not pay hundreds of dollars. A faulty gas cap may cause this code ). Note: The respective Powertrain Diagnostic Procedures Manual will direct the technician to determine if the vehicle evaporative system has an external system leak. It means a very small leak has been detected.

In fact, the leak can be from a hole as small as 0. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle’s fuel system. The site for Ford truck owners, by Ford truck owners. Few places to check - rubber hose under air box (requires removing the airbox) and hoses … connecting to evap system under the van on the drivers side.

I cleared my code , drove until I had of the monitors ready, then went and got my smog test. PASSED WITH FLYING COLORS. Replaced the gas cap with an aftermarket from Advance Auto, cleared the code , and the code stayed off until I passed emissions and threw away the receipt for the gas cap and threw the old one away. Next day the light came back on. This code indicates the possibility of a malfunction in the vent.

I replaced the purge valve canister in hopes of rectifying the issue. Your system automatically pressurizes itself at certain times to check for leaks. If the problem is fixed try taking the car up to about 50MPH for a dec … ent amount of.

This means the sensor in charge of evaluating the exhaust pressure is not working due to a poor.

It could be something as simple as a broken vacuum line, or a evaporative canister. I had put up with check engine light for a few years- was told by Onstar it was a loose gas cap- but I would tighten and tighten and then just ignore the light. 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.

Just last week went to get a smog check because my registration required the check and didn’t pass the test. EVAP system in the Leak Test Refer to Monitor Test. 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. I think it has probably something to do with the Fuel Filter. However, a couple of days before doing the fuel filter I was having trouble starting my car, which was not battery related.