Blinking CEL? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

2L82RUN · 05-31-2012, 05:13 PM

I've recently noticed I'm getting a blinking CEL at times while driving. It's not setting a code of any type and doesn't seem to affect performance at all. Does anyone have any idea what is going on? I'm running 8-9psi with a boost cam. Any ideas welcomed

camslambam · 05-31-2012, 05:22 PM

Hmmm.....

So you have a CEL but no codes are showing up on your scanner/sct/whatever you use?

Might be the light malfunctioning...?

xx_ED_xx · 05-31-2012, 05:22 PM

code reader would be a smart investment

camslambam · 05-31-2012, 05:23 PM

Quote:

Originally Posted by xx_ED_xx

code reader would be a smart investment

By saying it's not throwing codes I'd assume he means nothing is appearing on his scanner.

If he doesn't have a scanner...

lol

2L82RUN · 05-31-2012, 05:27 PM

Yep. Have a scanner. No codes setting. CEL will blink for up to 30 secs or so and then go away. Hasn't stayed on to this point. Owners manual mentions a blinking CEL and refers to a misfire. If that's the case it may be the cam but I never noticed it blinking until the past week or so

10aSSee D · 05-31-2012, 05:35 PM

I had a cel come on for a while then go off. When it was on I read the code and it was the o2 sensor. Then it would go away and come back on for a day or two and disappear. As of right now no cel....

xx_ED_xx · 05-31-2012, 05:37 PM

If the CEL is flashing there is a code PERIOD. Get a scanner that can read it

camslambam · 05-31-2012, 05:42 PM

What rpm do you idle at?

Does RPM drop sharply after you stop accelerating?

jay@redline-motorsports · 05-31-2012, 05:49 PM

flashing cel is a p0300 random misfire

MA2010SS · 05-31-2012, 05:49 PM

Check your plugs, I worked on a silverado with a 5.3 had a small cam and a couple of other minor supporting mods with an occasional flashing cel without and codes, found 3 fouled plugs...just a thought, same engine family with similar problem as you are describing

2L82RUN · 05-31-2012, 05:52 PM

Quote:

Originally Posted by jay@redline-motorsports

flashing cel is a p0300 random misfire

Thanks. That's what I was looking for. I was setting p0300 after cam install on occasion. Tuner advised it was due to the cam lope and computer throwing the code thinking it was a misfire. He tuned the code out so that's probably why I'm seeing it blink now without setting the code

jay@redline-motorsports · 05-31-2012, 06:07 PM

there is a table in the ecm that is time between crankshaft targets vs rpm if the car takes to long between events it thinks there's a misfire. when the car lopes because of the cam it takes too long between targets and sees a misfire and since there's no rhyme or reason to the lope vs cyl # it thinks its random, not isolated to a cylinder. if the code is deleted then you loose that diag capability completely, rather those thresholds need to be raised in the idle region and left alone elsewhere so the code can still function.

ducted · 05-31-2012, 06:44 PM

I had the same error and was a ignition cable not properly connected to a spark plug.

Miguelito · 04-15-2013, 11:20 AM

Quote:

Originally Posted by 2L82RUN

Thanks. That's what I was looking for. I was setting p0300 after cam install on occasion. Tuner advised it was due to the cam lope and computer throwing the code thinking it was a misfire. He tuned the code out so that's probably why I'm seeing it blink now without setting the code

I also have the same issues after installing cam... blinking CEL and after 30 seconds its gone.

What was your solution ? Did you change anything ?

BLACK10 · 04-15-2013, 01:38 PM

i agree, random misfire code

Alvin@PCMofNC · 04-16-2013, 09:17 AM

Talk to your tuner. Does the car actually feel like a miss or does it seem fine? If it seems fine you are likely OK just need to revisit the tune on the car. If the car actually feels like its missing you can be doing damage to the cats. That is the intention of the light flashing instead of just steady on.

HorsemenLC-SS · 04-16-2013, 09:40 PM

I was getting a blinking cel and no codes. I got a scan gauge ll and it shows codes that the computer has found as well and its throwing a p0650 which is cel light malfunction. No issues with performance whatsoever. It doesn't blink all the time either. Just once in a blue moon. that p0650 code has never showed on a regular scanner nor thrown the cel light before. Food for thought.

Miguelito · 04-17-2013, 03:48 AM

Thanks guys

Just took a look yesterday on the plugs and wires...all fine and in good condition, car drives fine and have power.

After disconnect the plugs and wires yesterday no blinking CEL... i will watch it for the future

Yeah we also didnt find a code on the scanner

Maybe i will proof it at my tuner on saturday with another scanner if we find a code

05-31-2012, 05:13 PM	#1
2L82RUN Drives: ABM SS/RS Join Date: Sep 2009 Location: WV Posts: 574	Blinking CEL? I've recently noticed I'm getting a blinking CEL at times while driving. It's not setting a code of any type and doesn't seem to affect performance at all. Does anyone have any idea what is going on? I'm running 8-9psi with a boost cam. Any ideas welcomed __________________

05-31-2012, 05:22 PM	#3
xx_ED_xx Drives: 04 Silverado Join Date: Jun 2010 Location: Floriduh! Posts: 1,124	code reader would be a smart investment __________________

05-31-2012, 05:27 PM	#5
2L82RUN Drives: ABM SS/RS Join Date: Sep 2009 Location: WV Posts: 574	Yep. Have a scanner. No codes setting. CEL will blink for up to 30 secs or so and then go away. Hasn't stayed on to this point. Owners manual mentions a blinking CEL and refers to a misfire. If that's the case it may be the cam but I never noticed it blinking until the past week or so __________________

05-31-2012, 05:35 PM	#6
10aSSee D Drives: Silver 2010 SS Camaro Join Date: Jul 2009 Location: TN Posts: 1,210	I had a cel come on for a while then go off. When it was on I read the code and it was the o2 sensor. Then it would go away and come back on for a day or two and disappear. As of right now no cel.... __________________ MODS: Whipple 2.9L SUPERCHARGER 666RWHP 562TQ ADM Stage 2 Cam ADM Dual Fuel Pump System ADM CAI ADM Boost & Air Fuel Ratio Gauges Patriot Performance Dual Valve Springs Hurst Short Throw Shifter KW V1 Coilovers Stainless Works Full Length Headers & Full Exhaust Elite Engineering Catch Can Forgeline GA3 Satin black wheels 20x9.5-20x11

05-31-2012, 05:37 PM	#7
xx_ED_xx Drives: 04 Silverado Join Date: Jun 2010 Location: Floriduh! Posts: 1,124	If the CEL is flashing there is a code PERIOD. Get a scanner that can read it __________________

05-31-2012, 05:22 PM	#2
camslambam Account Suspended Drives: 2010 SS, 06 SRT10 Ram Join Date: Nov 2011 Location: C. America Posts: 1,668	Hmmm..... So you have a CEL but no codes are showing up on your scanner/sct/whatever you use? Might be the light malfunctioning...?

05-31-2012, 05:42 PM	#8
camslambam Account Suspended Drives: 2010 SS, 06 SRT10 Ram Join Date: Nov 2011 Location: C. America Posts: 1,668	What rpm do you idle at? Does RPM drop sharply after you stop accelerating?

05-31-2012, 05:49 PM	#9
jay@redline-motorsports Drives: 930 Join Date: Apr 2012 Location: fl Posts: 80	flashing cel is a p0300 random misfire

05-31-2012, 05:49 PM	#10
MA2010SS Drives: 2010 Camaro SS Join Date: Aug 2010 Location: Somerset MA Posts: 493 View My Garage	Check your plugs, I worked on a silverado with a 5.3 had a small cam and a couple of other minor supporting mods with an occasional flashing cel without and codes, found 3 fouled plugs...just a thought, same engine family with similar problem as you are describing __________________ 2010 Camaro SS Whipple SC, CAI Inc Intake, JRE 4.11 Gears, TSP 1 7/8" LT headers no cats, 3" magnaflow exhaust, HPT, RX Catch Can, LSR Toe Rods, LSR Trailing Arms, ALKY Control Meth, McLeod RXT Twin Disc, DSS 1000HP alxes, DSS aluminum DS, ZL1 fuel pump, Tuned by SLOWHAWK Performance Bridgewater MA 577RWHP

05-31-2012, 06:07 PM	#12
jay@redline-motorsports Drives: 930 Join Date: Apr 2012 Location: fl Posts: 80	there is a table in the ecm that is time between crankshaft targets vs rpm if the car takes to long between events it thinks there's a misfire. when the car lopes because of the cam it takes too long between targets and sees a misfire and since there's no rhyme or reason to the lope vs cyl # it thinks its random, not isolated to a cylinder. if the code is deleted then you loose that diag capability completely, rather those thresholds need to be raised in the idle region and left alone elsewhere so the code can still function.

05-31-2012, 06:44 PM	#13
ducted Drives: 2010 Camaro 2SS/RS/LS3 Join Date: Apr 2010 Location: Spain Posts: 21	I had the same error and was a ignition cable not properly connected to a spark plug.

04-15-2013, 01:38 PM	#15
BLACK10 POWER TECH Drives: 2010 CAMARO. 10.04@133mph, 1.4 60' Join Date: Jul 2009 Location: Lafayette, Louisiana Posts: 4,395	i agree, random misfire code __________________ LETHAL RACING.COM 337-258-7692

04-16-2013, 09:17 AM	#16
Alvin@PCMofNC Drives: 2010 IOM RSS Join Date: May 2009 Location: Mooresville Posts: 340	Talk to your tuner. Does the car actually feel like a miss or does it seem fine? If it seems fine you are likely OK just need to revisit the tune on the car. If the car actually feels like its missing you can be doing damage to the cats. That is the intention of the light flashing instead of just steady on. __________________ See what's in our shop on Facebook! Customer Build Blogs! www.pcmofnc.com Performance Installs - Dyno Tuning - Mail Order Tuning & Sales 704-307-4227

04-16-2013, 09:40 PM	#17
HorsemenLC-SS Drives: 2010 Camaro SS, 2005 CTS-V Join Date: Mar 2013 Location: Las Cruces Posts: 23 View My Garage	I was getting a blinking cel and no codes. I got a scan gauge ll and it shows codes that the computer has found as well and its throwing a p0650 which is cel light malfunction. No issues with performance whatsoever. It doesn't blink all the time either. Just once in a blue moon. that p0650 code has never showed on a regular scanner nor thrown the cel light before. Food for thought.

04-17-2013, 03:48 AM	#18
Miguelito BAD TORO Drives: 2010 Camaro 2SS RS black/iom Join Date: Nov 2009 Location: near Dortmund / Germany Posts: 48	Thanks guys Just took a look yesterday on the plugs and wires...all fine and in good condition, car drives fine and have power. After disconnect the plugs and wires yesterday no blinking CEL... i will watch it for the future Yeah we also didnt find a code on the scanner Maybe i will proof it at my tuner on saturday with another scanner if we find a code __________________ "Bad Toro" 2SS RS, GFX black painted, KW V3, 10x22" ET35 SAT-Rims with 265/30 R22 and 295/25 R22 Conti Super Contact2, tinted windows, Kooks LT-Headers and Cats, Henriks Performance (CKP470) Cam, Hurst Short Shifter, LED Daytime Running Lights, Bowtie Delete, Volant CAI, Sidemarker clear, Black taillights and bezels, Braking steel flex lines with Dot4, Separation of circulation braking and clutch system, IdealG clutch master cylinder, Lingenfelter Clutch Pedal Return Kit...