i took my car for emissions today and it failed it... they gave me a paper with the codes

P0161 - 02 SENSOR HEATER CIRCUIT( BANK 2 SENSOR 2)
P0156 - 02 SENSOR CIRCUIT MALFUNCTION (BANK2 SENSOR 2)
P0141 - 02 SENSOR HEATER CIRCUIT( BANK 1 SENSOR2)

HAS ANYBODY EVER HAD THIS HAPEN AND DOES ANYBODY KNOW WHAT THOUSE CODES MEAN???.. ANY ADVICE IS APRICAIATED

 

The heating elements in two of the O2 sensors have gone bad. You'll need to replace them. I'd replace all four.

 

many miles on the car?At 100k the o2 sensors are regular maint. replacement items and yours appear to be failing.Both are post cat sensors(after the cats)
you really need to get it on a scope that shows function of the sensors and tests operation of the cats.To rule out possible cat failure.
Have you been driving around ignoring a check engine light?
Have you noticed a big drop in fuel mileage?
Did you know that for $39 you can get a good obd2 scanner from
http://www.harborfreight.com/
Item 94169 if you have a store near you they will meet the internet price if you take in a print of the web ad.
Then you can read your own codes in the future and clear them when you have done the repair.Also reads emission readiness status so you know when you are good to go at the smog station.
ohlord
autohausaz.com usually carries the sensors,ask them for a quote.They ship free over 50 bucks.

 

you don't need to replace all 4, just do the 2 front ones....... very rarely i'd change the rear ones........when i was a tech. start w/ the front ones........

 

[QUOTE=ohlord;2767007]many miles on the car?At 100k the o2 sensors are regular maint. replacement items and yours appear to be failing.Both are post cat sensors(after the cats)
you really need to get it on a scope that shows function of the sensors and tests operation of the cats.To rule out possible cat failure.
Have you been driving around ignoring a check engine light?
Have you noticed a big drop in fuel mileage?
Did you know that for $39 you can get a good obd2 scanner from
http://www.harborfreight.com/
Item 94169 if you have a store near you they will meet the internet price if you take in a print of the web ad.
Then you can read your own codes in the future and clear them when you have done the repair.Also reads emission readiness status so you know when you are good to go at the smog station.
ohlord
autohausaz.com usually carries the sensors,ask them for a quote.They ship free over 50 bucks.[/QUO

the car is about to hit 97k miles and the thing is that the check engine light never came on.... anybody know how much they should cost?????

 

[QUOTE=tasho3;2767803]like ohlord said, check autohausaz. might be the cheapest

 

i checked their prices. if you want them i'll sell to you 220 shipped. i have over 400 positives feedback on ebay, power seller.


let me know if you are intrested.

 

if its cheaper to get it from mbhustla, get it!...he works as a mbtech in socal so you're in good hands!

 

for 2 or 4 and what brand???

 

i called autohausaz.com and they dont sell them

 

try mercedesshop.com

 

they dont have them neither .... thank you very much for the help guys...i really appriciate it

 

2, both bosch

they are left and right

 

http://www.boschautoparts.com/RB.NA....=MERCEDES-BENZ
The real problem I see is that you have no light.If you bought the car in the last year and the po removed the bulb something was wrong and they knew it.You are now paying the price.Did they run the tests or just hooked it up and said unable to run tests due the the presence of obd2 codes?
Something is causing those post cat sensors to be out of flat line and like the member above said it could be the pre cat sensors it could also be other problems upstream.Who knows what damage has been done operating out of range,but if something was not on the up and up from the po I would get it on a scope and find out what was going on before throwing parts at it.
ohlord
what year C43?
Your mbtech has a good price for the two precat sensors I would get it on a indies diagnostic machine first to really find out if something more serious is going on.

 

i'll def. consider it but let me talk to my mechanic first

 

its a 1998 but u starting to scare me with "The real problem I see is that you have no light.If you bought the car in the last year and the po removed the bulb something was wrong and they knew it.You are now paying the price.?

 

meaning to scare you since most of those cel's have simple solutions,some that don't even cost much
However if someone intentionally shut down the system to hide the cel light you need to find out what is wrong so it can't do more harm.
ohlord