Changed fuel filter now I get check engine light

[Arkapigdiesel]

Alright, I changed my fuel filter for the first time at 10K miles. After I got the new fuel filter in I screwed the cap back on nice and snug. I turned my key on and let the WTS light turn off. Then, I just bumped the starter and let it sit for awhile. After sitting, the truck fired right up and then died.



I turned it over a few times and then I got it to crank back up. Anyway, went out this morning and the truck didn't start the first time (it always starts the first time). I turned the key the second time and it started but the check engine light stayed lit up.



Anyway have any opinions on what it might be? Air in lines maybe?

 

[JFaughn]

Did you pull the codes ? Maybe you bumped a wire , disconnect , when you were in there .

 

[Arkapigdiesel]

Did you pull the codes

I don't have a tool that will pull codes.

 

[brista]

I don't have a tool that will pull codes.

Turn the key quickly on then off three times leaving it on the third time. Your odometer will show the code(s) present then say ---done---. Post the codes here.

 

[Arkapigdiesel]

Turn the key quickly on then off three times leaving it on the third time. Your odometer will show the code(s) present then say ---done---. Post the codes here.

Thanks for posting that. I turned the key on/off three times quickly and I saw a code momentarily but I had in mind that I did the key off/on three times and on the fourth time I saw the code. By the time I saw the code I had already turned the damn key back and I lost it :{



I tried it again multiple times and now all I get is ------, then it says ---done---. Will the code reappear?

 

[RDyson]

If it is saying done without displaying a code, your OK. When our trucks throw a code and then it clears itself, the CEL will go out after starting and driving it 3 times.



Randy

 

[Arkapigdiesel]

If it is saying done without displaying a code, your OK. When our trucks throw a code and then it clears itself, the CEL will go out after starting and driving it 3 times.



Randy

Thanks for your help fellas. If the CEL doesn't clear I'll try the key on/off thing again and will post the code on here.



Happy New Year to ya'll.



Shawn

 

[bmoeller]

Not sure on the filter setup on the new trucks, but I know if the water sensor isn't plugged in good enough, or a at all, it can turn the CEL light on, in other trucks I've driven.

 

[robmints]

Shawn,

There is a flash for CEL's that don't mean anything. My truck does it also and I don't need to change the fuel filter. The dealer knew about the problem a few weeks ago but the flash was not out when I was there. If it wasn't a holiday weekend I would have asked them to do it today.



Last night when you were done did you drive it at all or did you just start it for minute? Is there a good way to purge the lines after a fuel filter change?



Happy New year to you too!

 

[Arkapigdiesel]

Last night when you were done did you drive it at all or did you just start it for minute?

I just started and ran it for a half a minute or so.

 

[rattlbox]

i waould like to know why the wts light was on?. . i never get the wts light when i change my fuel filter

 

[DFrank]

i waould like to know why the wts light was on?. . i never get the wts light when i change my fuel filter

You would if you changed the filter on a cold truck.



Obviously you want warm oil to change so you get it all out,but I don't imagine it matters for fuel. Anyone see areason to differ?



I was just contemplating changing my fuel filter and the truck has been parked for 24 hours.



Dave

 

[rbattelle]

Someone correct me if I'm wrong, but I believe as of 04. 5 it's not necessary to bump the starter to get the LP to run for 30 seconds - they do it automatically when the key is turned to "RUN".



I used to let the LP run its 30-second cycle 2 or 3 times before starting it. Now that I have a gauge, I find it takes several startups to get all the air out of the lines so that pressure is >10psi instantly when the pump turns on.



Ryan

 

[CTRice]

I got a lit CEL light just after I changed my fuel filter. I was also installing a X-Monitor guage setup. I pulled two codes:

P0191 Fuel Rail Pressure Sensor

P0111 IAT Sensor.

I found that the P0111 code was pending and had only one occurrence.



I cleared these codes but have not yet driven the truck to see if they return.

Could changing the fuel filter cause the P0191 code to show up??



What does the P0111 code require for correction? Is this a concern if it comes back??



Thanks, Chuck

 

[rbattelle]

Could changing the fuel filter cause the P0191 code to show up??

It can, if the supply (low side) pressure to the CP-3 is too low for too long, causing the CP-3 to be starved of fuel. That, in turn, would cause a fuel starvation at the rail, which would most immediately manifest as an inability to achieve the demand rail pressure.



If the problem doesn't recur, the CEL will extinguish after 5 consecutive startups and the code would clear from the ECM after 40 consecutive warmup cycles.



Ryan

 

[CTRice]

Thanks, Ryan.

Can you give me any ideas about the P0111 code?. I have cycled and recycled the key on/off numerous times to try to read codes. Could this have been the reason I set the P0111 code??



Chuck

 

[rbattelle]

Thanks, Ryan.

Can you give me any ideas about the P0111 code?. I have cycled and recycled the key on/off numerous times to try to read codes. Could this have been the reason I set the P0111 code??

Possible, but highly unlikely. There used to be a rash of people who hooked up things like X-monitor or other electronic brains that required an IAT connection and they forgot to reconnect the IAT sensor before the first startup. That, of course, would set the code and trip the CEL. Any chance you did that?



If it were me, I'd pull the IAT sensor connection, blow on it a bit to clear any debris, then reconnect it. It's possible it was just a fluke.



Ryan

 

[steved]

Someone correct me if I'm wrong, but I believe as of 04. 5 it's not necessary to bump the starter to get the LP to run for 30 seconds - they do it automatically when the key is turned to "RUN".



I used to let the LP run its 30-second cycle 2 or 3 times before starting it. Now that I have a gauge, I find it takes several startups to get all the air out of the lines so that pressure is >10psi instantly when the pump turns on.



Ryan

I have to bump mine...



steved

 

[CTRice]

CEL light has not relit since I used my scanner to turn it off. I will check the IAT connection as you suggested. Thanks again Ryan.



Chuck

 

[Arkapigdiesel]

It can, if the supply (low side) pressure to the CP-3 is too low for too long, causing the CP-3 to be starved of fuel. That, in turn, would cause a fuel starvation at the rail, which would most immediately manifest as an inability to achieve the demand rail pressure.



If the problem doesn't recur, the CEL will extinguish after 5 consecutive startups and the code would clear from the ECM after 40 consecutive warmup cycles.



Ryan

Ryan,



Right on man. My CEL turned off this morning just like you said it would. Thanks for the help.



Shawn