 |
|
09-20-2006, 05:39 PM
|
 |
Hummer Veteran
|
|
Join Date: Dec 2005
Location: Anchorage, Alaska
Posts: 135
|
|
Any one else having this check engine light?
All 3 (mine/wife/brother in law) of ours have had a check engine light in the last 2 weeks.
Wife: P300 engine misfire
Mine: P302 engine misfire
Brother in law: who knows (whole other story)
Mine only happens after the "low fuel" indicator comes on. ??????????
Once I fill up the tank, it goes off. 
The wifes goes off and on at random.
All have less than 10K, but more than 8K miles.
Wife's is going in for cylinder head replacement today.
f5stop? Any suggestions?
Regards,
Dan
__________________
2006 White H3, Adventure package, stock for now, 2006 Black H3 Adventure package with a few extras.
|
09-20-2006, 08:46 PM
|
 |
Hummer Guru
|
|
Join Date: Jul 2006
Location: Stouts Creek
Posts: 4,192
|
|
Re: Any one else having this check engine light?
Mine has gone on as I have experimented with air intake mods. 
__________________
"For God so loved the world he gave his only son that whoever believe in him would not perish but have everlasting life. "
(John 3:16)
2006 H3 Slate Blue,Header,Jacked,CAI,Toyo35's,HHO.
Priors...
Explorer
Commander
71 Vette
You Name it!
|
09-20-2006, 09:51 PM
|
 |
Hummer Guru
|
|
Join Date: Jul 2005
Location: Idaho
Posts: 4,744
|
|
Re: Any one else having this check engine light?
Quote:
|
Originally Posted by H3 Alaska
All 3 (mine/wife/brother in law) of ours have had a check engine light in the last 2 weeks.
Wife: P300 engine misfire
Mine: P302 engine misfire
Brother in law: who knows (whole other story)
Mine only happens after the "low fuel" indicator comes on. ??????????
Once I fill up the tank, it goes off.
The wifes goes off and on at random.
All have less than 10K, but more than 8K miles.
Wife's is going in for cylinder head replacement today.
f5stop? Any suggestions?
Regards,
Dan |
If there is a rough or rougher than usual idle with those codes, a new cylinder head is coming your way. However, if no idle and the light only comes on when the tank is real low, I might say it could be a fuel pump. Lack of fuel is causing a misfire, setting the code. Not a usual occurrence, but it could happen.
When the low fuel is on, what is your fill up in gallons? It could be your low fuel light is coming on too late, and you are about out of fuel and the pump is starving a bit.
__________________
Black Sheep Hummer Squadron
(ME TOO)
|
09-21-2006, 02:20 AM
|
|
Hummer Veteran
|
|
Join Date: Dec 2005
Location: Anchorage, Alaska
Posts: 135
|
|
Re: Any one else having this check engine light?
Last night when it happened I only put in $15 because I was late for dinner at my sons, and of course everyone was waiting on me.
I will look back at some recent fuel receipts and post back.
The wife's did have a rough idle, but mine does not.
__________________
2006 White H3, Adventure package, stock for now, 2006 Black H3 Adventure package with a few extras.
|
09-22-2006, 12:32 AM
|
|
Elcova Rookie
|
|
Join Date: Sep 2006
Location: Washington
Posts: 5
|
|
Re: Any one else having this check engine light?
There is a known issue/bulletin out on this issue for P0300 thru P0305 Emissions misfire DTC. You will get a Check Engine Light and may or may not experience rough idling. *Some* VINS under 287591 have these parts that were machined wrong or something and need to be replaced. The new parts contain harder intake valve seats to prevent intake valve wear and leakage.
This happened to me last week. My H3 (7,500 miles) had been idling a little rough for a couple weeks and then got the Check Engine Light. Onstar diagnosed the DTC and said to go directly to the dealer. The dealer replaced some intake valves and the cylinder head. Runs great so far. Sad to see my brand new H3 with the motor torn apart though.
Nothing to do with gas folks, get it fixed asap!
|
09-22-2006, 02:44 AM
|
|
Hummer Veteran
|
|
Join Date: Jan 2006
Location: Colorado Springs, Co
Posts: 27
|
|
Re: Any one else having this check engine light?
Took mine to about 12,500'. All kinds of things came on. Long story short it was a Mass airflow sensor.
|
09-29-2006, 06:26 PM
|
|
Elcova Rookie
|
|
Join Date: Sep 2006
Location: Washington
Posts: 5
|
|
Re: Any one else having this check engine light?
H3 Alaska did your wife's get the cylinder head replacement? Did it resolve the issue?
Mine is still running good...
|
10-11-2006, 10:46 PM
|
 |
Hummer Novice
|
|
Join Date: Feb 2006
Location: Presque Isle, Maine
Posts: 19
|
|
Re: Any one else having this check engine light?
Yes. My engine check light went on yesterday at 10,300 miles. My brother is a GM mechanic and he said there is a new cylinder head heading my way.
__________________
2006 H3, Black, Luxury, Off Road, Automatic Transmission, Sunroof, Trailor Hitch Package, XM, Mud Flaps, Black Assist Steps
|
10-16-2006, 07:43 PM
|
|
Hummer Veteran
|
|
Join Date: Dec 2005
Location: Anchorage, Alaska
Posts: 135
|
|
Re: Any one else having this check engine light?
Just took it back in this morning because it was running rougher than before the new head. Service advisor said it's a "cam shaft sensor". 
__________________
2006 White H3, Adventure package, stock for now, 2006 Black H3 Adventure package with a few extras.
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
 Hybrid Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT +1. The time now is 10:26 AM.
|
