Floyd88

I have a 5th Gen 1999 Prelude, Type SH with ~120k miles

Check engine light and Atts light both came on, pretty sure they always both came on. Ran diagnostics, here is what the lights are blinking

Engine Light:
8

ATTS Light: (in this order until the pattern was repeated)
43, 19, 43, 42, 72, 42, 43

Looking for what these codes mean, and any help appreciated. A link to a summary of codes would be great!

Sorry for the redundancy of these engine code posts. I did a search to find a list of codes, but all it came up was other people posting their codes, and not a reference list. So thanks!

thepreludedude

well, i hope tpc doesn't mind me posting this:
Toronto Prelude Club - HondaPrelude.TO articles = maintenance - check engine


probably an 80 engine code.

i think atts light always comes on with the engine light.

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golfradict

Thanks, nice info. this one is saved in my favorites.

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"2001 Type SH"
"We are the people our parents warned us about"

www.discounttiredirect.com

thepreludedude

your welcome

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pIERCE

I've posted it before, and it is quite usefull, but is it in the FAQ? Can it be put there?

Darren's 01 SH

Well the only code I could find on that list that applied was a CKP/TDP Sensor code.

I think you are going to have to find a list of ATTS codes because there aren't any on that link.

Floyd88

So are the CEL codes the same as the ATTS codes? Or is there a separate list for the ATTS. Some of codes that the ATTS is flashing aren't listed on that provided link. Any ideas? The codes are correct, check it on several flashing cycles. Thanks again for the posts, replies, and links!

thepreludedude

atts codes:
43 - ECM communication line
19 - Steering angle sensor
42 - ECM communication line
72 - Different diameter tires


I have the whole list but it is PDF. Not sure how to upload it to the net. I'm sure there is a simple way but my brain is asleep.

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lude4lifeh22

email it to me roger, I can host it. You should know my email address from paypal, etc.

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I design the world you live in.... Cheers for Industrial Designers!!

95 Integra LS <<<>>> 99 CBM Prelude SH

Floyd88

Update:

Borrowed a friend's hand held OBD2 reader, and I get P0401: Insufficient Exhaust Flow Detected.

How does that have anything to do with the codes I was reading from the self diagnostic method? Could those have just been old codes in the system?

I erased the codes, and will just wait to see if it throws another.

dearshoppers

Did you ever figure this out? Sounds like the same issue I ran into a few months back. Turned out to be a bad (secondary) O2 sensor. I took it to a trusted dealer and they struggled with it overnight until they finally figured it out. It was throwing half a dozen disparate codes each time they reset it. Dealer price on the sensor was insane. After-the-fact, I found it online for a quarter the cost... easy to replace.

Like you, the ATTS light would turn on a second or two after the CEL. Dealer immediately pointed out it's not a coincidence, it's by design. When the ATTS unit sees that an engine code is thrown it turns itself off. When the O2 sensor was replaced, the ATTS kicked back in.

golfradict

I tried to start running unleaded plus gasoline instead of the premium and my O2 sensor would fail about every 5K miles. When I pulled the sensor off it was full of black soot. I would just clean it off with carburetor cleaner and it was good to go for about another 5K. I now run the premium (like the manual states) and sure enough the sensors don't foul any more.

__________________

"2001 Type SH"
"We are the people our parents warned us about"

www.discounttiredirect.com