replaced o2 sewnsor 2 with jaguar original, still getting check engine light???

 

What is the OBD code you are getting wth the check engine light. Have the codes read and post the P number. It would also be most helpful if we new what year, make and engine you are working on.

 

its a 2005 x type, first it was a o2 heater then after replacing it it reads something about performance

 

ill get the p code, im at my office now and dont have my code reader, but the mechanic that replaced it with the jag part cant figure it bout either

 

did someone clear the codes after the o2 sensor was replaced ?

 

2006 jaguar x type 3 l o2Sensor 2 code
yes it was cleared but came back after 2 starts
new code performance code sensor 2

 

The Jaguar 3.0 has a total of 4 oxygen sensors. 02 number 2 doesn't help in figuring out what the problem may be.
In another post I saw where you had a PA204 code. First PA isn't a valid code if it was a typo and you have P0204 then your problem is not with the oxygen sensor but with the #4 fuel injector. Most likely disconnected, damaged connector or damaged wire.
If the mechanic changed the 02 sensor on the front bank at the top of the exhaust it is possible to have move, dislocated or damaged the #4 injector connector.
To really be of help we need the codes read and posted as read.

 

the code is P2AO4. o 2 sensor 2006 x type

 

Take note of the code meanings and work through them.

 

The generic definition of P2A04 is the bank 2 sensor 2. That would be the downstream sensor (after the catalytic convertor) on the engine bank closest to the radiator. If you are still reading incorrect voltage values (which is the definition) then I would look at the plug/connector for damaged pins and check for a blown fuse. While running you should have voltage to the sensor.
If a generic sensor was installed you might want to check for correct wiring connections.

 

thank you, have checked the fuse and
the sensor 2 downstream was purchased from jaguar
any other suggestions?

 

Well we are down to only a few things that can be wrong.
1. I particularly pointed out that it is the sensor after the convertor on the exhaust closest to the radiator. Is this the one the mechanic replaced? It isn't uncommon to confuse bank 1 and bank2.
2. The connector is located beneath the battery. Have you examined the connectors and made sure that they are not cracked or the pins bent?
3. Have you checked for voltage at the connector?

If you have verified all of the 3 things listed above then the replacement sensor is defective or you have a broken wire.

 

What should the voltage me at the connector? There are four wires, 2 for the heater and 2 for the sensor voltage.

Watching youtube I found that the resistance across the heater wires should be about 1 Ohm.

Btw, on the bank ID, I just say rear bank or front bank. ...keeping the beer count low enough, you can't confuse where the front of the car is