Hi,
I have a 2003 V8 Tundra (78K miles) which recently gave me a fault code P0051 - oxygen sensor heater control circuit low - bank 2 sensor 1.

Which if I understand correctly is the passenger side engine manifold oxygen sensor (according to other posts on this site).

The dealer wants $185.16 just for the part.

Where else can I get one? I tried these two places, but don't have much confidence they are the right ones (some say before and after catalytic converter in the same description).

Also any specials tips or tricks to change it would be appreciated. Thanks guys.

-Kris

EBAY! I bought a full sensor for $69 shipped. You can get them cheaper on amazon.com or other websites but they are universal and you have to do some wire splicing. $185 is too much. Try to avoid dealer parts, if possible. They use OE parts but the markup is highway robbery.


Hi,
I have a 2003 V8 Tundra (78K miles) which recently gave me a fault code P0051 - oxygen sensor heater control circuit low - bank 2 sensor 1.

Which if I understand correctly is the passenger side engine manifold oxygen sensor (according to other posts on this site).

The dealer wants $185.16 just for the part.

Where else can I get one? I tried these two places, but don't have much confidence they are the right ones (some say before and after catalytic converter in the same description).

Also any specials tips or tricks to change it would be appreciated. Thanks guys.

-Kris

for a good price on OE parts, try Direct PARTS connection (http://www.directpartsconnection.com) otherwise i would try Auto Parts Fast at RockAuto (http://www.rockauto.com) they carry Denso oxygen sensors which is who makes them for Toyota

Wherever you end up getting it from, I'd highly recommend ordering both of the front sensors. Mine went out within a few hundred miles of each other... one the second one actually went out while I was waiting to get the first one that went out.
I got mine from Tonkin Parts Online (http://www.tonkinpartsonline.com)
They used to advertise here, but I'm not sure if they still do.

DENSO Aftermarket: Catalog Search From DENSO Aftermarket: Performance Aftermarket Automobile Parts - Automobile Car Parts (http://www.densoaftermarket.com/catalog/catalog.php?part=o2sn)
Monarch Products has them for close to same price but the universal ones are cheaper? not sure what the difference is? call and ask!:yo:

Thanks for the vendor info guys.

Are they hard to get out? Hard to reach? I never really got under there and tried to find them.

Are any special tools required?

BOSCH makes a nice 02 sensor too.( around $90 at CARQUEST )

Do change both of them as when you change one, the ECU notices that the old one is a bit slow and will throw a code.

Replacing them is easy( maybe ) . Crawl under the truck and look near the end of the manifolds. You see the 02 sensor sticking out and the wires going out.

All you need is an 02 sensor socket ( looks like a deep socket with an opened side.

Place socket on 02 sensor and twist off with wrench.

50% of the time the sensor will pop right out. Insert new sensor, plug connector and you are done !

The other 50% of the time, At least one sensor will be reluctant to move. Then you have a challenge. you can try to spray some penetrating lube, wait and see if the sensor will get loose. If not, you will have to unscrew it by force ( and I mean force like using a 3 foot bar and really torque it loose).

Eventually it will come loose.

Problem with that approach is that you will damage the threads on the manifold. If you are lucky, you can use a tap and re-thread it. If the thread damage is too extensive, you will have to replace the exhaust manifold(s),

An option is to have a muffler shop weld the old bung shut and drill a hole in your manifold near the old one and weld a new bung on. Then you can thread your new sensor in. You might have to elongate the sensor wires a bit but this is easy. I did just that on a 2003 Tundra I used to have. It was a lot cheaper than replacing the manifolds for sure !

If you decide to replace the manifolds, plan on many hours of labor as those things are a PITA to remove.........

Maybe it is time for those headers that you have been dreaming about ?

If the sensor does not want to come out at first, no need to get horsey with it. Spray it liberally with penetrating oil and screw it back in. Work it in and out, spraying liberally and it will eventually work its way out.

The universal type have clip on connectors that you have to cut the wire to length and then attach the connector. Some will even tell you to use the old connector. The OEM type have a connector already mounted, it makes it a little easier.

When it throws this code p0051 it says bank 2 sensor 1... it this before the cat or after the cat?? the guy at Autozone said it was after..

When it throws this code p0051 it says bank 2 sensor 1... it this before the cat or after the cat?? the guy at Autozone said it was after..

Here's what my toyota manual says:


-Bank 2 refers to the bank that does not include cylinder 1
-Sensor 1 refers to the sensor being closer to the engine body

Which means... bank 2 sensor 1 would be the sensor in front of the cat on the passenger's side.

rockauto.com has the denso 134-4169 for $63.79 +shipping, $6.99 for me.
I ordered 3 last week, I needed 1 and Dad needed one, both P0135, bank 1 sensor 1, drivers side ahead of the cat. I told Dad that the forum said to get two cause the other side would go soon. He wouldn't bite. I changed mine and then his. He threw the P0155 code two days later. He now has my spare in his. It is great to be able to tell your Dad, "I told ya so"! :yo: So far I haven't thrown the code for the passenger side, but I ordered another and it should be here within the hour. He woulda saved $7 shipping if he had listened to youse guys.

Rock Auto rocks.