service engine soon on??

[sleekinfinitii30]

Hello guys, i really need help with my car is 2001 i30 with 53000 milesthe service engine soon suddenly on and i went to autozone already to diagnostic and come up with code PO138. it said o2 sensor circuit high volt(bank 1 sensor 2) just wondering if i can fix it by myself or must see the dealer to avoid high cost. how much do you think the parts cost ? i dont have the warranty anymore.please let me know the best way to fix it.i am scare because my family here for vacation and we will drive the car a lots and worry the car will be die soon or broke down on the road. i really2 apreciated and need the input.thanks much

[maxhopper]

Replacing an O2 sesnor is a DIY project. You can purchase a new sensor at http://www.sparkplugs.com. It's best to get one with the OEM connector.

First go to the FAQ/How-to thread at the top of the forum.Second go to the second post in that thread that lists the how-to's.Third click the link titled 5th Gen SES/CEL Codes.Fourth look up your code on the list.Fifth click the link for your code.Sixth, read the thread.

Finally, purchase the correct O2 sensor and install. There are also detailed instructions on how to replace O2 sensors in the FAQ/How-to thread.

[sleekinfinitii30]

thanks Scott, just wondering for code po138 autozone offer me with the bosch #15955 o.e. type 3 wire heated sensor located in front manifold/exhaust pipe.is this exactly the right part to fix this problem or i need more part?thanks guys.i wish i have more knowladge about cars!!

[maxhopper]

That is the incorrect location. It is the one labeled HO2S2-B1 Rear O2 sensor B1 in the picture below (lower right corner).

[sleekinfinitii30]

thanks again, just wondering if autozone have/sell this part and can i do it by my self or must have the dealer to install it?thanks much.Surya

[NutriaforBreakfast]

Ok to work on just remember the basics,

Just because the code says it's bad doesnt mean it truly is.Check the wiring harness from the O2 sensor to the connector.Best to use a multimeter to check resistance. If you decideto change out

1) You will need to trace your wires under the hood

2) This is exhaust work. You need to let your car cool offand spray WD40 on the threads of the O2 sensor before unscrewing, preferably the night before. Dont spray the electricapart of your sensor

3) Have a helper hold your exhaust pipe so you dont break itif it is old and brittle.

4) You will probably need a "stubbie" wrench to get to someof the 02 sensors, others are easier.

5) This has applied half the time I do electrical work-If you replaceone thing something else goes out-no matter what kind of car it is

[sleekinfinitii30]

i went take the car to nissan dealer and they told me i need to replace both of the o2 sensor for code po138. they give me good news that my car still have the warranty to replace it.my concern is should i just call the infiniti dealer service and tell them the problem and i just wondering if they still going to charge me? i am hoping no cost since my warranty still good. thanks again guys!

[sleekinfinitii30]

the dealer give me bad news that i dont have the warranty anymore.suckthey told me i need to replace both rear o2 sensor and they qoute me with part, labor and tax for $850.00 i was like whatttttt!!! that so freakin lot of money to fix it. i take the car back and i said i can wait. they still charge me for $163 to diagnostic the problem and reguler service. they told me to recomended for brake flush beside that the engine in good shape. the next day i fill my tank with premium gas and suddenly the ses light come off/gone.i am just worry the ses come on again and the car gonna broke down on me someday? please help guys how is the cheapes way to fix it without bring it to dealer.thanks so much

[maxhopper]

The cheapest way to fix it is to do it yourself.