DTC codes not showing

FlashPro questions & answers specific to the 2007-2012 Acura RDX
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Meatwad
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Joined: Fri May 11, 2018 4:23 am

DTC codes not showing

Post by Meatwad »

Hi,

After I did a valve adjustment I had a CEL related to emissions (per rdx screen below speedometer). I plugged flashpro into laptop and started datalogging. No error codes came up, and when I went to the obdii window, it showed a CEL and 3 DTCs, but again no codes.

The CEL has since gone away (after driving 30 miles or so and starting car approx 5 times) but it still shows that I have 3 DTCs without showing any codes.

I have screenshots on my laptop at home that I can upload later.

Any idea what's going on here? Thanks
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Hondata
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Re: DTC codes not showing

Post by Hondata »

Can you post the screenshot?
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Meatwad
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Re: DTC codes not showing

Post by Meatwad »

Before CEL cleared
no error codes.png
no error codes.png (1002.09 KiB) Viewed 10013 times

After CEL cleared
The attachment no error codes.png is no longer available
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Spunkster
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Re: DTC codes not showing

Post by Spunkster »

Have you looked at the error codes window?
Meatwad
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Re: DTC codes not showing

Post by Meatwad »

Yes the error codes window is blank as well. The second attachment didn't load - I'll reupload it. The window can be seen in that screenshot.
no error codes2.png
no error codes2.png (1.13 MiB) Viewed 9993 times
Meatwad
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Re: DTC codes not showing

Post by Meatwad »

Hi following up on this - what do you guys think?
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Hondata
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Re: DTC codes not showing

Post by Hondata »

Is the check engine light on?
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Meatwad
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Re: DTC codes not showing

Post by Meatwad »

The CEL went away on its own.
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Hondata
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Re: DTC codes not showing

Post by Hondata »

I think it is a fault with the way Honda reports stored error codes using mode 3 (DTCs) and mode 7 (stored DTCs) where the counter shows errors but none are returned.
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Meatwad
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Re: DTC codes not showing

Post by Meatwad »

Ok so not true DTCs?
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