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CEL/ATTS/speedo problems

 
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Old 05-09-2008, 10:15 PM
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CEL/ATTS/speedo problems

98SH-5MT w/ 147k

During a normal startup my CEL, ATTS lights came on with a slight humming coming from under the hood.

Interesting also is the speedometer stopped working. Never had any problems in the past. I'm going to check the oil level and gas cap to start...

any suggestions??
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Old 05-09-2008, 10:27 PM
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Get your car to a local Autozone or any place that will read you your CEL code(s)...that's the best way to find out what the deal is...











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Old 05-20-2008, 02:34 PM
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update

Diagnosed the CEL and came to code#17, which is the Vehicle Speed Sensor(VSS). Removed it from the tranny, ordered a new one for $177 at Honda and replaced this morning.

CEL/ATTS reset and lights did not come back on and speedo is now working. I noticed some sludge in the old VSS which might have tripped it.

FYI although CEL/ATTS and speedo were malfunctioning, I still had VTEC and the ATTS system was still working!




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Originally Posted by reelhybrid View Post
98SH-5MT w/ 147k

During a normal startup my CEL, ATTS lights came on with a slight humming coming from under the hood.

Interesting also is the speedometer stopped working. Never had any problems in the past. I'm going to check the oil level and gas cap to start...

any suggestions??
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Old 05-21-2008, 10:45 AM
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Since you noticed a sludge build up on the VSS i would sugjest changing your tranny fluid. Dont flush it just change it out for some fresh fluid. You may be gunking up your gears. And causing them to overheat.
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Old 08-14-2012, 09:26 PM
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Re: CEL/ATTS/speedo problems

I have a 97 SH, and last night when driving home I started to have the same problems you described. The needle on my speedometer just dropped to zero, and then jumped back up again. Finally it dropped for good and the CEL and ATTS lights came on. I also noticed that when the needle dropped the engine seemed to act slightly different. I haven't pulled my codes yet, about to do that. but I thought it was interesting as my car is almost as the exact same mileage as your.
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