OK, check engine light came on and I got this code--P 0442-- what the hell does that mean. I ran it next to the list of codes over in the how to section and I need to know if I need to read it as error code 42, as stated in the list, or if this is something different entirely. If it is something different entirely, what exactly does it mean? :-s
Need help determining what this code means
- Thread starter yoda13
- Start date
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BluPhant
Full Access Member
According to the junk I posted in the how-to forum
Code 42:
An open or shorted condition detected in the auto shutdown relay circuit.
An open condition detected in the ASD relay output circuit.
An open or shorted condition detected in the fuel pump relay control circuit.
An open circuit between PCM and fuel gauge sending unit.
Circuit shorted to voltage between PCM and fuel gauge sending unit.
No movement of fuel level sender detected.
In reality, dunno what it means, but maybe that will help isolate it? Good luck bro, let us know what u find.
-Blu
Code 42:
An open or shorted condition detected in the auto shutdown relay circuit.
An open condition detected in the ASD relay output circuit.
An open or shorted condition detected in the fuel pump relay control circuit.
An open circuit between PCM and fuel gauge sending unit.
Circuit shorted to voltage between PCM and fuel gauge sending unit.
No movement of fuel level sender detected.
In reality, dunno what it means, but maybe that will help isolate it? Good luck bro, let us know what u find.
-Blu
Marlon_JB2
Kombat Edition Jeep
Let me go in my garage and get my list of codes. I'll BRB.
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2003KJ
Member
Well according to the very awesome list i found a while back on the internet, it stands for Evaporative Emission Control System Leak Detected (small leak)
here's the site....very good site.
http://autorepair.about.com/cs/troubleshooting/l/bl_obd_main.htm
here's the site....very good site.
http://autorepair.about.com/cs/troubleshooting/l/bl_obd_main.htm
Marlon_JB2
Kombat Edition Jeep
0442 A leak has been detected in the evaporative system!
Yup, that's it... (almost) the same list I have in the garage, lol.
Yup, that's it... (almost) the same list I have in the garage, lol.
2003KJ
Member
What is this list you have?
I know a buddy of mine (who has been in the mechanic biz for a while) bought one of the scanners a while back. And he got a book with it listing all the codes, and I have this site I found, but what's this list you have and where did you get it?
I know a buddy of mine (who has been in the mechanic biz for a while) bought one of the scanners a while back. And he got a book with it listing all the codes, and I have this site I found, but what's this list you have and where did you get it?
Marlon_JB2
Kombat Edition Jeep
http://www.ptcruizer.com/computer-codes.html Basically the same list.
Those 2 digit codes are oooollllldddd. #-o I don't think you can even use them for a diagnosis anymore.
Those 2 digit codes are oooollllldddd. #-o I don't think you can even use them for a diagnosis anymore.
2003KJ
Member
I remember that site a while back......I think thats how I stumbeled upon about.com's list.
i think those codes are for OBD-I, which was pre 1996. I also think thats why nobody can get the ignition on off on off on off thing to work any more. I think it's cause that was an OBD-I thang, and OBD-II has about a bazillion more codes.....lol
i think those codes are for OBD-I, which was pre 1996. I also think thats why nobody can get the ignition on off on off on off thing to work any more. I think it's cause that was an OBD-I thang, and OBD-II has about a bazillion more codes.....lol
BluPhant
Full Access Member
Okey doke, I've updated the how-to to reflect the info from this thread. Thanks for the info!
I misread the first post, thought it was 42, not 442. Doh!
-Blu
I misread the first post, thought it was 42, not 442. Doh!
-Blu
I called the stealership and they confirmed for me that it was a leak in the evaporative system. Now I ask you guys, I have absolutely no clue what that is. Is this a serious problem? Can I drive my Jeep until I get it fixed, or do I need to park it and get it fixed ASAP? Anyhelp figuring out exactly what this and how urgent it is would be appreciated. \/
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Marlon_JB2
Kombat Edition Jeep
On-Off-On-Off-On works, and so does Hold Trip Button, turn key to On.
04RkMtnKJ
Full Access Member
I called my brother but he didnt answer. My first guess from that code would be the gas cap loose. Did you fill up recently?
Posted too soon. My brother just called me back and said more than likely it was the gas cap that was left loose. Now if you check it and lighten it the light may not go off right away. It takes up to 3 good cycles before the light goes off which means start up to warm three times without it deeing that leak again. However when the light goes off the code will still be stored in the computer until it is erased either with the DRBIII or disconnecting the battery.
As far as being unsafe to drive with the engine light on unless the light is flashing constantly it usually is ok. If the light is flashing it means it is something for serious normally with emissions ie the cat or O2 sensor.
Posted too soon. My brother just called me back and said more than likely it was the gas cap that was left loose. Now if you check it and lighten it the light may not go off right away. It takes up to 3 good cycles before the light goes off which means start up to warm three times without it deeing that leak again. However when the light goes off the code will still be stored in the computer until it is erased either with the DRBIII or disconnecting the battery.
As far as being unsafe to drive with the engine light on unless the light is flashing constantly it usually is ok. If the light is flashing it means it is something for serious normally with emissions ie the cat or O2 sensor.
04RkMtnKJ
Full Access Member
That is one of the most common causes of the that code being thrown. When a customer would bring there car in and I would see that code the first thing I would do is check the gas cap. 99% of the time sure enough it was loose.
2003KJ
Member
Rule of thumb, give the gas cap atleast 3 clicks before you walk away from it.
I can never get the on off on off on off method to work on mine. How long should I wait between on and off?
I can never get the on off on off on off method to work on mine. How long should I wait between on and off?
grogiefrog
Full Access Member
Nice job guys! =D>
I had this happen one time with my Honda. Luckily a guy at the dealer didn't charge me to read the codes.
I had this happen one time with my Honda. Luckily a guy at the dealer didn't charge me to read the codes.
OK, so I filled the gas tank, and made sure the cap was on tight and proper, which I am not sure it was before. Then I went home and disconnected the battery so that the computer would reset. Now we shall see if that was the problem. 25 miles so far, and the light hasn't come back on, so I am keeping my fingers crossed. But we shall see. hmmm.gif
04RkMtnKJ
Full Access Member
Normally it will take 3 consecutive cycles for the computer to turn on the light. Cycles being starting cold and driving untill fully warm. It does this because the light would constantly be on if it warned you of every little thing it sensed. The computer knows if it sees something 3 times in a row there must be something wrong.
