Flashing Check Engine Light
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,706
Likes: 5
From: Toronto Ontario
Flashing Check Engine Light
I did a search and didn't come up with a response that met my criteria.
I was parked for about 30 minutes after driving for 30 minutes yesterday. I started the car up and I didn't notice the light right away. It was about 10 seconds after driving the car when the car seemed to be hanging on to second gear a bit longer than usual. I then noticed the flashing engine light. I immediately pulled over and turned off the car. I didn't wait too long (maybe 15 seconds) before starting it up again. The light has not come back on.
Is this something I should be concerned about, or could it be one of those unexplained occurances? I have not scanned for codes yet but will at first opportunity.
Just wondered if this has happened to anyone else.
Rob
I was parked for about 30 minutes after driving for 30 minutes yesterday. I started the car up and I didn't notice the light right away. It was about 10 seconds after driving the car when the car seemed to be hanging on to second gear a bit longer than usual. I then noticed the flashing engine light. I immediately pulled over and turned off the car. I didn't wait too long (maybe 15 seconds) before starting it up again. The light has not come back on.
Is this something I should be concerned about, or could it be one of those unexplained occurances? I have not scanned for codes yet but will at first opportunity.
Just wondered if this has happened to anyone else.
Rob
Last edited by Polar Jet; Jun 6, 2011 at 08:46 PM.
Heel & Toe
Joined: Feb 2011
Posts: 17
Likes: 0
From: Gainesville FL
I had that happen once. I had left a coil pack unplugged after some work. I felt the car running a little rough, then the flashing light came on. I feared the worst, and pulled over at the nearest gas station.
As soon as I opened the hood I did a facepalm.
As soon as I opened the hood I did a facepalm.
Safety Car
Joined: Nov 2002
Posts: 4,394
Likes: 6
From: Melbourne FL
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,706
Likes: 5
From: Toronto Ontario
I will try to scan for codes tomorrow if I get a chance.
What I want to know is if the light not coming back is a common occurrence? I don't notice anything problematic while driving.
What I want to know is if the light not coming back is a common occurrence? I don't notice anything problematic while driving.
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Tech Contributor
Joined: Aug 2008
Posts: 2,902
Likes: 21
From: Oak Hill Virginia
Also, just in case... You do know you don't need a scanner to pull codes in the c5 right?
Pro
Joined: Mar 2008
Posts: 698
Likes: 20
From: Md
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,706
Likes: 5
From: Toronto Ontario
Finally got it scanned and looked at quickly. Apparently it is a P0300 history code with the worst offender looking like the #2 cylinder.
I was planning on doing plugs and wires on the car anyway so that will be taken care of sooner rather than later. Hopefully that solves the problem.
Any thoughts though?
Thanks
I was planning on doing plugs and wires on the car anyway so that will be taken care of sooner rather than later. Hopefully that solves the problem.
Any thoughts though?
Thanks
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
P0300 is a Random Misfire, a P0302 would pint to # 2 cylinder. The flashing CEL happens then the P0300 code is set if the midfire happens more than 2 times in a set timeframe.
The codes from the DIC do NOT show specific cylinders only the P0300 code, you need a different reader to get the other p030X codes.
The codes from the DIC do NOT show specific cylinders only the P0300 code, you need a different reader to get the other p030X codes.
Last edited by dougbfresh; Jun 8, 2011 at 11:29 AM.
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,706
Likes: 5
From: Toronto Ontario
P0300 is a Random Misfire, a P0302 would pint to # 2 cylinder. The flashing CEL happens then the P0300 code is set if the midfire happens more than 2 times in a set timeframe.
The codes from the DIC do NOT show specific cylinders only the P0300 code, you need a different reader to get the other p030X codes.
The codes from the DIC do NOT show specific cylinders only the P0300 code, you need a different reader to get the other p030X codes.
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,706
Likes: 5
From: Toronto Ontario
Tech Contributor
Joined: Aug 2008
Posts: 2,902
Likes: 21
From: Oak Hill Virginia
Have fun with #7 when you do the new plugs and wires... That thing and I "argued" for quite a while.
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,706
Likes: 5
From: Toronto Ontario
I'm going to change them all regardless. I know they should last longer that 40,000 miles but I don't like that they've been in there for 11 years. I won't do the work myself. I have skilled GM techs that know this stuff inside out do it for me. One of the perks for being a GM employee!!!
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Take a little plumbing loose around #7 and it isn't too tough to change!!
Tech Contributor
Joined: Aug 2008
Posts: 2,902
Likes: 21
From: Oak Hill Virginia