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98 Prelude Check engine light code 67

 
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Old 11-24-2011, 01:20 AM
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98 Prelude Check engine light code 67

So tonight, (the DAY after i buy the car), the check engine light comes on. I use the method here to get the code and i get code 67. According to that site, the problem is "Catalyst System Efficiency Below Threshold". Its apparently caused by either the Catalyst converter failing or the secondary O2 Sensors failing. Should i be worried about this or is it safe to drive with? Also, what would i need to do to fix this problem?
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Old 11-24-2011, 02:50 PM
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Re: 98 Prelude Check engine light code 67

Try replacing your 02 sensor first. Then if that does not fix the issue - try getting an OEM replacement cat...


It sounds like the typical seller that reset the ECU prior to selling/ you looking at the car. So they lied when they said the car had no issues. If you got it from a dealership, then you should complain and make them cover the costs if possible.
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Old 11-28-2011, 01:47 AM
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Re: 98 Prelude Check engine light code 67

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Originally Posted by wing8806 View Post
Try replacing your 02 sensor first. Then if that does not fix the issue - try getting an OEM replacement cat...


It sounds like the typical seller that reset the ECU prior to selling/ you looking at the car. So they lied when they said the car had no issues. If you got it from a dealership, then you should complain and make them cover the costs if possible.
Thanks, I'm going to take it to belle tire this week to see what they say and find out how much they want for new shocks, struts and timing belt and to do a once over of the car.

Changing the O2 Sensor seems easy enough so I'll probably order one this week and do it this weekend. Do i really need an O2 sensor socket or will a simple wrench work fine? Also, I took a quick look, and i couldn't find a DIY for it but is there a DIY (with pictures) for doing this?
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Old 11-28-2011, 09:25 AM
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Re: 98 Prelude Check engine light code 67

The socket really helps, makes the job 10x easier, but sometimes the secondary o2 is pretty easy to get to with a wrench. Kinda up to you, take a look at it before you purchase one though.
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Old 11-28-2011, 01:16 PM
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Re: 98 Prelude Check engine light code 67

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Originally Posted by sevs753 View Post
Its apparently caused by either the Catalyst converter failing or the secondary O2 Sensors failing. Should i be worried about this or is it safe to drive with? Also, what would i need to do to fix this problem?
Correct, Both of These things could cause this code to be thrown. Heres your best solution. 3 inch stainless custom exhaust. call it a day. :D to answer the "is it safe part" - Yes. And no depending on the severity of the clog of the CAT. a Hot cat can reach temperatures of 1200 degrees Fahrenheit (IT WILL GLOW RED) Fire hazard anyone? . In addition, if the cat is clogged you may experience a significant loss in power along with shifting issues If you have a automatic transmission. In general, cars that have occluded exhaust systems will run like CRAP. When the 02 sensor detects that the cat is clogged, It tells the engine to reduce the air and fuel ratio and timing in order to prevent engine damage. SO, in conclusion. Its safe, but not. LOL. Upgrade the exhaust, Let the girl breathe.
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Old 11-28-2011, 02:23 PM
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Re: 98 Prelude Check engine light code 67

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Originally Posted by VulcanRaven View Post
Correct, Both of These things could cause this code to be thrown. Heres your best solution. 3 inch stainless custom exhaust. call it a day. :D to answer the "is it safe part" - Yes. And no depending on the severity of the clog of the CAT. a Hot cat can reach temperatures of 1200 degrees Fahrenheit (IT WILL GLOW RED) Fire hazard anyone? . In addition, if the cat is clogged you may experience a significant loss in power along with shifting issues If you have a automatic transmission. In general, cars that have occluded exhaust systems will run like CRAP. When the 02 sensor detects that the cat is clogged, It tells the engine to reduce the air and fuel ratio and timing in order to prevent engine damage. SO, in conclusion. Its safe, but not. LOL. Upgrade the exhaust, Let the girl breathe.
The car runs fine. I don't know what the model ran like originally but it doesn't feel like it's running worse than what it should be. VTEC kicks in where its supposed to and it doesnt feel like its struggling. I think what I'll do is replace the O2 sensor now and see if that fixes the CEL. If not, then i'll just buy a new cat from someplace like Rockauto. When thy say the cat is "direct fit" does that mean i can just unbolt the old one and bolt the new one on? or is there some welding that has to be done?

edit: would these parts on rock auto work for me and fix the problem thats causing the CEL? (sorry for the part numbers. I can't figure out how to direct link to a part on rockauto)

go here: http://www.rockauto.com and do a part number search.
O2Sensor: 2344092
Cat: 40383

Last edited by sevs753; 11-28-2011 at 06:12 PM.
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Old 12-03-2011, 11:42 PM
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Re: 98 Prelude Check engine light code 67

I am having the same exaxt problem!!! I want to find out if i replace the cat with an aftermarket highflow cat and full 3" exhaust will my CEL still be on?
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Old 12-04-2011, 12:18 AM
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Re: 98 Prelude Check engine light code 67

I wouldn't know personally. I'm just trying to do the min to fix the CEL. tomorrow im replacing the secondary O2 sensor so hopefully that'll fix it.

I have heard that some Cat's will fix it and others, you have to use some workaround to fool the ECM into thinking the cat is working right.
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