I recently bought a 2006 Ford Taurus. I got it inspected after buying it, and it passed inspection and emissions. Took it home two days ago. Last night the check engine light came out, and when I got it scanned it gave a P0420 - which, from other forums, indicates catalytic converter problem, but also may be o2
The car has been sitting for a while. One recommendation I got is to reset the code and drive it at highway speed for a while, and see if it comes back on, to see if it just might be a result of it sitting idle for some time.
So, the question I have is, how can I get the code reset? I've heard that you can do this by disconnecting the battery, but I've also heard people recommend that you NOT do this.
The P0420 code is for the bank one cat efficiency being below threshold, which if the O2
sensor is ok, suggests a problem with cyl bank-1 cat converter.
All that said, cats don't usually just die prematurly, something usually causes their demise, so we need to look up stream for a cause, like a coolant leak, fuel trim problem, ect
, that you would want to put right Before replacing the cat converter, lest the new one be put down too!!!!
SO, if you have other trouble codes, post All code Numbers you have.
Disconnecting the battery B- cable will erase the code, but will also wipe the KAM
, which includes the fuel trim & base idle memory, so to prevent possible driveability problems, you'll want to at least do a cold & warm idle relearn routine listed here. Can Someone Tell Me How To Reset My Check Engine Light?
More thoughts for consideration, let us know how it goes.