00' Sonata check engine light

Recently I had a local shop read the codes from my car. They advised me
that based on the series of codes downloaded I would need to replace both
O2 sensors with an upgraded part number. Also because of the new sensor
part number the computer software would need to be upgraded. My next step
is taking the car to a Hyundai dealer to confirm this but had a couple
questions to throw out here.
1. Has anyone else had this problem?
2. Can I fix this problem myself?

 

1. This is a common issue. If your sensors are indeed unupdated, then
there should be a recall open on your vehicle. Call your local Hyundai
dealer with your vin and have them check for recalls. If recall V01 is
open, have that done first prior to attempting any additional repairs for
oxygen sensor codes. It includes replacing the front oxygen sensors (if
required) and reprogramming your ECM.

2. You can replace the front oxygen sensors yourself if you have a fair
amount of tooling. They're difficult to get to. I use two swivels, an
oxygen sensor socket, a very long extension, and a ratchet. If you don't
have these items or something else which will allow you to get onto these
sensors easily, you will curse this vehicle. The reprogramming should
either already be done or be free (under recall), but you won't be able to
do it yourself. Only a dealer will be able to do it.

 

Thanks hyundaitech.
I called a dealer and they told me the V01 recall had been performed.
Turns out a dealer I brought the car to for service did it about a year
ago. So I called this dealer and they told me that the ECM was
reprogrammed but no sensors relaced. Does this make sense? I went to the
hmaservice web site and all the TSB's on this recall call out part
replacement in some form or another.
What do you think?
Thanks again for your help.

 

Unless the new website (www.hmaservice.com) provides the campaign details
to the general public that it didn't before, you don't have access to the
latest version of the recall bulletin.

In a nutshell, Hyundai has determined for each specific vin whether any of
the oxygen sensors need to be replaced and the dealer can only be paid for
doing the repair prescribed by Hyundai. The basis for their decision was
whether the vehicle was manufactured with the updated oxygen sensors or
whether either of the upstream sensors was replaced.

If the recall has been performed, you're pretty much on your own for this
repair unless the vehicle is still within the 5/60 warranty period.

 

From the hmaservice web site I was able to get TSB 03-01-011-2 which is in
the recall bulletin group. It is dated 01-2004. I stand corrected in my
statment about the sensors needing replacement no matter what. Closer
review of this document showed a breakdown of level of repair. V01
31B043R3 states reprogramming only needed. I pulled the service report
from the dealer and they document just that. (not sure how level of repair
is determined. I would think an internal database using VIN)
OK. From this I agree with you, I'm on my own.
So could I ask for your help one more time?
These are the codes I have....
P1134, P0153, P1154.
It looks like trouble with B1S1 & B2S1.
Should I replace both of these?
If I do whats the best way to reset the codes?
Thanks again for your expertise.

 

These codes pretty much all indicate a slow response rate. If you have no
exhaust leaks, you should replace both upstream sensors, p/n 39210-3712A
on the firewall side and 39210-3716A on the radiator side. The best way
to reset the codes is by using a code reader (if it has that capability)
or a scan tool. If not, you can probably do it by disconnecting the
battery.

 

All the code readers I've seen have a reset button. I have the $150 one
from Innova/Equus, and it does indeed read out the Hyundai's #1134 code
(yeah; I've got an oxygen sensor in my future, too). The other brand I
tried also read out the same code. The Innova code reader seems to be on
sale with rebate all the time at Kragen (and affiliated stores), so at
this point, I'd say that the regular price there is really $100.

Now, I'm not about to try out the reset button. It's tempting, but
Hyundai's drive cycles are shrouded in secrecy -- I've got no idea how
many days/weeks/months/years it will take to accumulate the data to
satisfy the monitors (test programs in the car's computer). I need to be
really patient; after the repair, it'll take a certain number of starts
before the computer is satisfied -- in other words, satisfied that all
the test cycles have been completed enough. Resetting the dash light
also resets all the monitors: whoosh! They're all zeroed. And if you've
got a smog test due at DMV within three days, well...

Richard

 

If you've got a code stored, that won't pass the OBD test either, so you've
got to choose wisely.

 

Well, I purchased the sensors & cut-away socket.
I installed them yesterday. Not as bad of a job as I was expecting. Only
took me 40min. Most of the time was removing stuff to get good access.
Don't really have the cash to invest in a code reader so I opted for the
"disconnect the battery" method. This all started because I failed the
states emisions test. I have 60 days from the initial test to get repair
done. So I'll drive the car a couple weeks to make sure the computer is
reset and everything is ok. Oh in case your wondering...the lights out.
This web site(and the people involved)is a great tool I'm sure I'll be in
need of assistence again some time down the road.
Thanks for all the help.