DTC codes not showing

FlashPro questions & answers specific to the 2007-2012 Acura RDX
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Meatwad
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DTC codes not showing

Post by Meatwad » Fri May 11, 2018 4:31 am

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 » Fri May 11, 2018 9:16 am

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

Post by Meatwad » Fri May 11, 2018 2:45 pm

Before CEL cleared
no error codes.png
no error codes.png (1002.09 KiB) Viewed 2260 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 » Fri May 11, 2018 3:21 pm

Have you looked at the error codes window?

Meatwad
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Re: DTC codes not showing

Post by Meatwad » Sat May 12, 2018 7:51 am

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 2240 times

Meatwad
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Re: DTC codes not showing

Post by Meatwad » Fri May 18, 2018 8:34 am

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 » Fri May 18, 2018 3:35 pm

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

Post by Meatwad » Tue May 22, 2018 12:19 pm

The CEL went away on its own.

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Hondata
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Re: DTC codes not showing

Post by Hondata » Wed May 23, 2018 8:51 am

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 » Thu May 24, 2018 5:35 pm

Ok so not true DTCs?

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