A friend of mine has a 2012 Honda CRV. He was having an issue
with the check engine light coming on due to a catalytic converter
issue. That has been going on for a long time, it's not new.
If he goes on long trips, it goes out, but driving around time
the cat converter isn't happy.
So, I lent him my handheld code reader so he could check the
codes. He told me he hooked it up, read the codes, cleared
the cat code and then they car would not start. It tried to
turn over, but did so just barely. He had to jump it to get
it going. Then overnight it went dead again. So, he's thinking
it was due to the code reader, but I'm thinking it's just
coincidence and he has a bad battery, right? He drove the
car around after that for a few days, without using the code
reader, no problems starting.
So, he drives up here to NJ from NC and stops about 10 times
along the way at rest stops, shutting the car off. Each time
it starts with no problems. He gets to my house, shuts the
car off and within a few mins, I hook up the code reader, read
the codes, the cat code was set again, I cleared it. Then I
go to start the car, and it barely tried to turn over just a
bit. I was dumbfounded. Next I took a look at the battery.
It looked old to me, he checked where he bought it and they
say it's 3 years old. I pulled the caps off and found one
cell that instead of water, had what looked like solid black
crap in it. So, the battery is kaput. But the mystery remains.
How could he drive around for a few days, no problems. How
could he drive up here, stopping 10 times and the car starts,
yet when you hook up a code reader and clear the codes, it
I thought about this awhile and the only angle I can figure is
that resetting the computer causes it to somehow use more power
on the next start? Like maybe it wakes up all the various
electronic modules in the car to say hello, check status, etc,
while it doesn't do that on a normal start? Any ideas? It's
one of those mysteries that you since once in awhile.