Find another garage as the mechanic is a parts replacer with no diagnostic
ability. The ECM compares the primary and secondary O2 senser to determine
if the cat is bad. If an O2 senser is bad It could also give a false cat
code. The O2 sensers can be checked with the
obd2 tester. Also those engines have a problem with the EGR ports in the
manifold carboning up. That causes an imbalance in the fuel trim and over a
period of time will burn out the cat. Check with your local Honda dealer for
the TSL on the EGR.
"Steve" <srl1215@comcast.net> wrote in message
news:GbednQ4Epa4pgHTanZ2dnUVZ_tajnZ2d@comcast.com. ..
>I bought my daughter a 99 Honda Accord. It's a real clean car with 86K
>miles.
>
> I recently put $1300+ dollars into it for the Timing belt/Water pump and
> all belts replaced as well as completely new front brakes and rotors.
>
> No sooner does she start using it again then the check engine light comes
> on. The garage we take it to says they need another $1000 to replace the
> Catalytic Converter. They told me the codes read that the o2 sesor was bad
> and the Cat was bad.
>
> This smelled a little to me, like one of those "oh, it might be the 02
> sensor, or the cat, but we just rerplace everthing and make more money
> that way" kind of answer.
>
> Do Accord cats really fail at 90K miles?
>
>
>
>
>