LexusHI

OK, so I have a 1990 ls400 and I need help.

I got Check engine codes 25 AND 26 (for air fuel ratio faults). I recently changed all spark plugs, wires and bad ignition coils because my car had no power at all. Also because my catalytic converter on the passenger side was glowing red due to all the gas being dumped.

So after I changed the spark plugs, wires, and coils, the car ran great and still is. But the Check engine light came back on and so I got the 25 and 26 codes.

What else could be going wrong?

I am new to cars so please help the noob

* I didnt check the codes before changing spark plugs and all that
* I also have a hole in my intermediate pipe (after o2 sensors, if that changes anything)

Any help will be appreciated. THANKS

steve2006

Hi,
Did you reset the ECU by removing the battery lead for 10 minutes?

LexusHI

Yea, I always reset it cause I really hate seeing that light on haha...

but of course it comes back on, only when Im on the freeway going 60mph for about 5 mins. or after about 50 miles of regular 25-40 mph driving.