Hello
My O2 sensors are not getting voltage where do they get there voltage.
I have OBD wiz on my pc to check engine codes and the O2 sensors show 0 volts on all 4. Looking for a starting point.
Thanks

 

Copy the JTIS from here
https://www.jaguarforums.com/forum/x...archive-66034/
There's everything you need to know (and more!) including very comprehensive wiring schematics.
When you say 'no volts' do you mean the heaters are getting no supply?

 

yes the O2 sensors show no power, voltage is 0 on all 4 sensors
I use ODB Wiz on my laptop shows the O2 engine code and on the diagnostic page the sensors show 0 volts all 4 of them.
Thanks for the reply
Smity

 

Please post the actual code.
These are 4 wire devices, heater power on two and voltage measurement from the ECM on the other two.
If the heater supply is dead it is supplied by one fuse. I don't have a wiring diagram for your engine but you will find the info in the JTIS.
If the fuse has blown the next question is Why? - maybe a wiring short to ground.
Follow things a bit further (you will need a voltmeter) and keep us informed.

 

On the subject of sensors, can anybody help please?

My garage changed Bank 1 Sensor 1, gave me the car back and 100 miles later the engine light came back on. They said it must be a faulty diagnosis and initially wanted to change sensor 2. However, they have now changed their minds and are saying someone has swapped the sensors around at some point and they should fit them the opposite way around....grrrrr.

I'm doing some research of my own and bought a code reader from Machinemart - it's telling me Code 1646 which when I look up on Jaguar X Type Specifications -- Engine Specifications it tells me is Bank 1 Sensor 1 - i.e. the one they say they replaced.

My question is, when you stand in front of the car and look at the engine, is Bank 1 upstream on the left or the right? The view is so restricted I can't see the catalytic converter, so the terms upstream and downstream are pointless. At the moment the lead with the grey plug goes to the right and the black to the left.

Any suggestions/help would be very welcome. My MOT runs out shortly and I gather they won't pass it if the engine light is on.

Many thanks in advance,

Tony

 

Tony,

Your forum Garage and Public Profile both list your Jaguar as an XK8. Do you also have an X-Type or is this in the wrong section?

For the MoT, an illuminated MIL will result in a fail but a faulty HO2 sensor is likely to fail the emissions part of the test regardless.

Graham

 

ok on the way in to work I will connect my pc and get you the data. I'm trying to get the JTIS download but it keeps coming up short.
Thanks be back tomorrow after 6pm -5GMT.
Smity

 

Oops - sorry about that - I forgot to update. Yes, the XK8 sadly went a few months ago to be replaced by this awful X Type (a cast off from my sister). I hate it. Will be selling on eBay as soon as I can get the sensor problems sorted out and a new MOT.

 

Good Evening
I have 2 codes stored the first is a P0037,HO2S Heater control low circuit, Bank 1 senor 2. The other code is P1647, Power Train. Status is pending, ECU 11, HO2S Heater Control Circuit Low.
What side of engine is Bank 1 and I know that Sensor 2 is the down stream after the cat.
These data readings are while cruising EXway to salty mine. Other 3 sensors seem fine.
Sorry you don,t like your X-type Tony, Mines a dream to ride in.
Thanks Steve
Smity

 

Sitting in the drivers seat bank 1 is on your right
Your code, as you say, means
HO2 Sensor 1/2 heater control circuit:
short circuit to ground
HO2 Sensor 1/2 heater failure so check the wiring to the sensor for shorts to groundthe downstream sensor either needs replacement.
On an XK the heater +ve supply to that sensor is blue/yellow, confirm that with your JTIS.