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Duramax --Check Engine light

Old 07-11-2012, 02:35 PM
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Default Duramax --Check Engine light

I have a 06 Silverado W/ Duramax. Truck only has 41K on it. Recently the check eng. light came on. The vehicle runs as before the light came on with no difference seen.Any duramax mechanics out there that may know the most common cause seen for code to set .It did this once before months ago but cleared itself after a couple of days . Thanks in advance for any input.
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Old 07-11-2012, 04:53 PM
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Wrong forum, post in trucks & trailers.
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Old 07-11-2012, 04:56 PM
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Faulty O2 sensor.

I'm not a mechanic.

I'm not even familiar with the truck.

Still...faulty O2 sensor.
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Old 07-11-2012, 05:02 PM
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Get yourself a ScanGauge2 off Amazon for about $100 and let it do the diagnostics for you. Plugs right up to your OBD2 port. Then Google search. Best $100 I spent for my International Diesel.
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Old 07-11-2012, 05:22 PM
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Dial onstar and have them do a diagnostic's.
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Old 07-11-2012, 06:01 PM
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Duramax doesnt have an o2 sensor. Diesels dont. The code can be for many things, I would think it would be an egr fault. Check your water and your oil. If those are fine, drive it until you have time to get it to a dealer and have them plug in. The generic code readers typically dont pull all the codes and you wont know what its really for. Where are you located?
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Old 07-11-2012, 06:17 PM
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glow plug is pretty common, mine has it for #6 right now but I dont care.
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Old 07-11-2012, 06:20 PM
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Located in the NE, in NH
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Old 07-11-2012, 06:23 PM
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Ok so glow plug would possibly affect cold weather starting, and not when running, right?? But throw a code?
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Old 07-11-2012, 06:26 PM
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Originally Posted by ddctech View Post
Duramax doesnt have an o2 sensor. Diesels dont. ?
O3 sensor then.

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Old 07-11-2012, 06:52 PM
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We can't guess at what the code is just by the light being on.

Just drive to your nearest Autozone etc and ask them to hook up a code scanner to it. (Free, 5 minutes) Once you get that code, come back and we can help.
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Old 07-11-2012, 07:23 PM
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my 06 LBZ just came on, #2 cylinder glow plug fault. Took it to autozone and they will tell you what's up.
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Old 07-12-2012, 05:18 AM
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mine has done it twice, once was egr and second was a glow plug which is pretty easy to change yourself, you have to have a scan tool to find out whic one it is though.
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Old 07-12-2012, 09:57 AM
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Originally Posted by Johnny Dreamer View Post
O3 sensor then.



Mine does have a 06 sensor under the fresnicreen modulator valves.
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Old 07-12-2012, 01:41 PM
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Originally Posted by ddctech View Post
. The generic code readers typically dont pull all the codes and you wont know what its really for.
That's the funniest thing I've read all day. Thanks for the laugh.

What kind of "tech" are you ? If diesel or engine related let me know where you work so I don't bring any of my stuff there.
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Old 07-12-2012, 01:50 PM
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Originally Posted by Johnny Dreamer View Post
O3 sensor then.

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Old 07-12-2012, 01:55 PM
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Originally Posted by ddctech View Post
Duramax doesnt have an o2 sensor. Diesels dont. The code can be for many things, I would think it would be an egr fault. Check your water and your oil. If those are fine, drive it until you have time to get it to a dealer and have them plug in. The generic code readers typically dont pull all the codes and you wont know what its really for. Where are you located?
Don tknow about duramax but simce buses and such have convertors I am sure soem diesels have some kind of O2 or other exhaust chemical content sensing - saw this

"The 2007.5 and newer Cummins 6.7 liter Bluetec diesels have an O2 sensor in the downpipe.

Typically, only particulate filter equipped diesels have O2 sensors"

???
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Old 07-12-2012, 01:59 PM
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Hold the phone!

Was I right! Hahahahhahahahahhaha.

Please let it be an O2 sensor, it would make my day.
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Old 07-12-2012, 02:14 PM
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Thanks for the input and the laughs guys !!------ I like the idea about swinging by Auto Zone and have the free code check. -----There is one a few miles from me. I'll let you know what they read on it.
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Old 07-12-2012, 02:47 PM
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Once you retrieve the DTC it will be easy to research via google search. Don't ask me how I know because my $100 generic code reader doesn't pull all the codes

BWAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAHAHAHAHAHAHAHAHA
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