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  #1  
Old 10-15-2012, 01:15 PM
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Maybe you folks can shed some light on the following - I bought my 2012 Ram 2500 w/CDT in May. I have approx. 9000 miles on it. Over the last thirty days the Check Engine light has come on three times. The first two occurrences were investigated and the service department told me the O2 sensors were, either dirty (which they cleaned), or replaced outright. Well....yesterday the light came on again! I'm bringing the truck back in on Friday to have them, once again, try to fix the problem.

The only mod I have done is to change out the air filter to a K&N. I routinely clean it once a week (OCD...I guess).

Any ideas? This is getting frustrating.

Tim
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Old 10-15-2012, 01:38 PM
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Sorry to hear of your troubles man. I would always return my vehicle back to stock to try and isolate a problem. Your service department told you it was dirty O2 sensors which could have something to do with your K&N air filter but in my opinion, not too likely, but you never know nowadays with all the EPA Emission junk they throw at these vehicles, especially diesels. Did they write down the code or codes that came up?
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Old 10-15-2012, 06:37 PM
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My light came on ... was loose gas cap.
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Old 10-16-2012, 04:49 AM
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Whats the current code for? You should be able to check by cycling the key 3 times.
I would also go back to the OEM filter. I'll see if I can find the filtration chart, but the OE filter ranked among the best and K&N was at the bottom, plus you don't want to run an oiled filter with a turbo.
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Old 10-16-2012, 12:36 PM
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Over oiling of K&N filters has been known to cause issues. Mainly issues with MAF sensors on gasoline engines. With a diesel, who knows?
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Old 10-16-2012, 08:43 PM
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I always get my codes ran myself at autozone first, that way I know where to look first. It also prevents you from getting screwed on non warraty repairs
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Old 10-16-2012, 08:58 PM
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I scan my own codes with this. Got an IPad for my BDay and the first app I bought was BlueDriver. It scans the OBDII bus and transmits the data to the IPad in realtime. It will read any active or passive codes and recommend repair procedures. You do need to purchase the OBDII dongle for $100.00 to get to the data.
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Old 10-17-2012, 02:06 PM
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Quote:
Originally Posted by NWRQC View Post
Whats the current code for? You should be able to check by cycling the key 3 times.
I would also go back to the OEM filter. I'll see if I can find the filtration chart, but the OE filter ranked among the best and K&N was at the bottom, plus you don't want to run an oiled filter with a turbo.
Quote:
Originally Posted by Wandell View Post
Over oiling of K&N filters has been known to cause issues. Mainly issues with MAF sensors on gasoline engines. With a diesel, who knows?
Quote:
Originally Posted by RansRAM View Post
I scan my own codes with this. Got an IPad for my BDay and the first app I bought was BlueDriver. It scans the OBDII bus and transmits the data to the IPad in realtime. It will read any active or passive codes and recommend repair procedures. You do need to purchase the OBDII dongle for $100.00 to get to the data.

Everyone....thank you very much for the replies! It never even occurred to me that the K&N filter might be the problem. I am switching back to the OEM filter today. Let you all know what the outcome is.

Again....thanks!

Tim
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Old 10-22-2012, 12:44 PM
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Well....it's a bust. The dealership informed me that they now think the problem lies with a module upstream of the O2 sensors. Sounds like their version of troubleshooting is "easter-egging" to me. This is getting frustrating....

I changed back to the OEM air filter by the way. Light came on again on Sunday.

Jeez...
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Old 10-24-2012, 12:20 PM
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Okay...Got the truck fixed and it is running smoothly. The dealership replaced the O2 sensors and control module.

One thing they did notice though....according to the service tech....my engine was over-filled with oil. To the tune of 3 quarts too much. I asked how he knew this and he showed me via the dipstick and the crank case filter. Went ahead and had a new oil change, and sure enough, 3 quarts too many in the oil catch pan. He also showed me the "new" O2 sensors he pulled and replaced with new ones....they were black with soot/oil.

I had my oil changed where I get my tires worked on, so I went back to them and cautioned them to ensure that the service techs were paying attention to detail when changing oil and such. I don't think they want to be liable for a turbo or engine replacement.

I guess the lesson learned here for all of us is to make sure they tech doing work on the CDT is knowledgeable before they even turn a wrench.

Cheers!

Tim
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