P0143 - O2 Sensor Circuit Low Voltage Bank 1 Sensor 3

[bendts]

Had this code for awhile now - as I understand (or think I do) it is one of the rear O2 sensors that dont affect the ECU or performance. Have a new downstream sensor, but what is sensor 3?

CAT's are gone, so I have the 2 upstream and the 2 downstream.

Bank 1 Sensor 3 makes no sense and cant find anything on the interwebs.

 

[discostew]

So if your cats are gone your never going to satisfy the computer with a new O2 sensor. Sensor 3 is common in a lot of newer Rovers. They have pre cat, mid cat , and post cat. Not sure why your scan tool is looking for a sensor 3.

If your cats are gone I think you should try to get the PROM out of a GEMS Disco from Austrailia. They don't run cats down there. If you figure out how to get your hands on one, get me one too. We just need a contact down there.

Scratch that, I see in your profile you have a Disco2. Not sure maybe you coud find a scan tool that could program that ECU to think it's an Austrailian truck. Disco2 is a reflash, Disco 1 you have to remove the PROM and replace it.

 

[bendts]

Yeah the sensor 3 thing is odd. I did have the bungs put in to raise the rear sensors up out of the exhaust flow. The refresh idea would be great. will search.

 

[jprover2]

Scratch that, I see in your profile you have a Disco2. Not sure maybe you coud find a scan tool that could program that ECU to think it's an Austrailian truck. Disco2 is a reflash, Disco 1 you have to remove the PROM and replace it.

Who knows this shop or person that can re-flash D2 ECM to Australian spec?

 

[discostew]

Not sure.

 

[JUKE179r]

@bendts … which diagnostic tester did you use to read the P0143 error? That P0143 fault code doesn't even show up in the RAVE manual. Also check fuse F2 in the engine bay.

@discostew … Australian reflash for a Disco 2 ECU? I never heard of this but I would like to know more about it. Unless it's the Nanocom option to change "Market" of the Valeo BCU to Australia...
Market: This code is used to identify the exact country for which the BCU is programmed. Every country has its own number and below is a list of the most common ones. If fitting a new BCU you should use the same code that was in the old one.
 Australia - 21
 Denmark - 89
 Finland - 139
 Netherlands - 350
 Norway - 353
Sweden - 473
 Italy - 228
 Unknown
 UK - 158
 USA – 539

 

[discostew]

@bendts … which diagnostic tester did you use to read the P0143 error? That P0143 fault code doesn't even show up in the RAVE manual. Also check fuse F2 in the engine bay.

@discostew … Australian reflash for a Disco 2 ECU? I never heard of this unless it's the Nanocom option to change "Market" of the Valeo BCU to Australia...
Market: This code is used to identify the exact country for which the BCU is programmed. Every country has its own number and below is a list of the most common ones. If fitting a new BCU you should use the same code that was in the old one.
 Australia - 21
 Denmark - 89
 Finland - 139
 Netherlands - 350
 Norway - 353
Sweden - 473
 Italy - 228
 Unknown
 UK - 158
 USA – 539

With the equipment I use I would get a choice of NAS or ROW. Maybe if you choose ROW ? Im just thinking its just a calibration file. PCM is the same. So if you could get your hands on that calibration file, you could install it. I don't really know for sure. But with the cats missing out of this truck, I wouldn't be wasting any money on post cat O2 sensors thinking a light will go off

 

[bendts]

@bendts … which diagnostic tester did you use to read the P0143 error? That P0143 fault code doesn't even show up in the RAVE manual. Also check fuse F2 in the engine bay.

The Ultra Gauge

 

[JUKE179r]

Really? Try and locate a dedicated Land Rover diagnostic tester but not an iCarsoft. I owned their CR Plus and it sucked.

 

[bendts]

I need to get to a LR shop anyways to reset the 3 amigos now that i replaced the front hub, so I can have them check for codes.

The code does turn in the Check Engine Light - so it has to be something - I'll check it again today

 

[discostew]

Yeah It's the rear o2 sensors freaking out cause you have no convertes. It's looking for a pretty flat wave after the converter has done it's after burn. So if you can fix the o2 sensor code it's going to store a cat efficiency fault. First it tests the O2 sensors, then the cats. Won't run a cat readiness test untill it sees good sensors. So don't spend any money trying to get your check engine light to go out, cause it won't stay off. I recomend you go spend that money on a bag of weed.

 

[bendts]

SORRY - Made a dyslexic mistake - The code I have is

P0413 - Secondary Air Injection System Switching Valve 'A' Circuit Open

So I'll have to figure out how to bypass that as I removed all that crap long ago. Maybe that can be "Programed " out also - I do have a non-Secondary Air Injection ECU, so maybe I can have that installed and set-up for my truck.