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The "Service Engine Soon" light

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These are both EVAP emissions codes. The first thing I would do is open the fuel door and take a good wiff. If you smell gas replace the fuel cap.

If you don't smell gas the next thing you can do is visually inspect all the EVAP hoses and lines for cracks or holes. The EVAP system consists of a purge solenoid, a charcoal canister, a vent solenoid, a fuel tank pressure sensor, and misc. lines and hoses. All of these will need to be visually checked for damage.

If you don't see anything with a visual check than the next step would be to have the EVAP system smoke checked for leaks. A smoke machine will be used to slightly pressurize the EVAP system with smoke. Where ever the smoke comes out is where is is leaking.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Posted on Mar 19, 2011

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How to reset Service Engine Soon light after replacing gas cap? Took to AutoZone when the Service Engine Soon light came on Error code P0440.


Disconnect the negative battery cable for 30 minutes. Reconnect after and the code will clear. However if the problem persists, the code will come back with in 20 miles or 30 minutes.

Aug 02, 2014 | 2000 Buick Regal LS

1 Answer

PO440


http://www.obd-codes.com/p0442
P0440 indicates the failure of the EVAP system to develop proper vacuum. If you got
and replaced a proper good quality gas cap, you have corrected the most common cause.
However, in fully searching the causes of this code (http://engine-codes.com/p0440_chevrolet.html ) (pardon the generic GM info, but will apply for you)-----you will find there are 5 other causes of the vacuum failure, which are independent of the gas cap. Your good local mechanic can sort those out; I would save your gas cap
receipt if you were advised to buy one not needed. As you probably know, your
State emission test facility checks your gas cap----so that is another way to find that specific portion of this answer,
(for their fee).
P0300 is a generic misfire code. For this, a specific Cadillac forum may be most
helpful = 2001 Deville intermittent service engine soon light code P0300
co-logo-100x100.png 2001 Deville intermittent service engine soon light code... I recently bought this car from an owner who took decent care of it but a week after i bought it, the service engine light appeared. After a few View on www.cadillacforums... Preview by Yahoo You will see that this generic code is perhaps more serious, costly, and harder
to track down than the P0440. You will also discover that P0301 is cylinder 1 misfire, P0302 is cylinder 2, and etc, etc. If you get a good diagnostic, they will generally
be able to localize the problem fairly specifically---and get a more specific fix. The person who reported this code was unhappy because he was given several ($$) fixes,
before he got one that erased the code, and was a solution. (Be forewarned ----A generic misfire can have umpteen issues--or one! !; use your own local preferred method for solving this with a mechanic who gives you good service, and stands behind what they do.)
2001 Deville intermittent service engine soon light code P0300

Jun 04, 2014 | 2001 Cadillac DeVille

1 Answer

Car won't start after putting in gas


This is a CLASSIC symptom of an evaporative emissions issue. GM has had tons of issues with this system. Don't even think about fuel pump at this point. Read this post on how EVAP works.

http://ricksfreeautorepairadvice.com/evaporative-emissions-system-primer/

Then read this post on service bulletins GM has issued on the EVAP system

http://ricksfreeautorepairadvice.com/p0440-p0441-p0442-p0446-evap-codes-on-gm-vehicleshicles-p0440-p0441-p0442-p0446/

Feb 26, 2018 | 2006 Cadillac SRX

2 Answers

1st code p0440, then code p0453 then p0452 now p0446


This problem is out side the gas tank , has nothing to do with the fuel pump or fuel level sending unit inside the gas tank .DTC P0446 EVAP Vent Solenoid Valve Control System . Do you know anything about automotive evaporative emission system ?
Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

This DTC tests the evaporative emission (EVAP) system for a restricted or blocked EVAP vent path. The control module commands the EVAP canister purge solenoid Open and the EVAP canister vent solenoid Closed. This allows vacuum to be applied to the EVAP system. Once a calibrated vacuum level has been reached, the control module commands the EVAP canister purge solenoid Closed and the EVAP canister vent solenoid Open. The control module monitors the fuel tank pressure (FTP) sensor for a decrease in vacuum. If the vacuum does not decrease to near 0 inches H2O in a calibrated time, this DTC sets.

Mar 13, 2017 | 2000 Cadillac DeVille

1 Answer

Code p0442 nissan altima


this is an obd2 trouble code table, it can help you understand the meaning of code.

Apr 19, 2012 | 2003 Nissan Altima

1 Answer

No Service Engine Soon seen for code P0442


code p 442 refers to evaporative emission (EVAP) system---small leak detected
it also refers to large leak detected --fuel cap off/loose === causes hose/connection,-- intake leak--EVAP canister---EVAP canister purge valve --mechanical fault --- EVAP pressure sensor

Oct 17, 2017 | Mitsubishi Cars & Trucks

2 Answers

Engine light codes p0440,p0442-found a fuel leak on left top side of engine,has a vacuum hose hooked to it is this the fuel pressure regualator?


P0442 Evaporative Emission Control System Leak Detected (small leak)
P0440 Evaporative Emission Control System Malfunction

Jan 30, 2010 | 2000 Pontiac Grand Am GT

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