O2 sensor Bank 2 Sensor 1

Shuriken_57 · 21st May 2021, 10:49

Hello gentlemen, I continue my research following my problems with the 75 v6.
I fixed the fuel and coolant leak.
My idle isn't smooth and the exhaust is noisy.

I made a diagnosis and got the error codes P0155 AND P0151.
I changed the O2 sensor located near the lower engine mount but fault codes reappear.
What do you think? Is this the O2 sensor?

https://www.the75andztclub.co.uk/for...7904580401.jpg

Thanks for your help.

Yorkshire GOC · 21st May 2021, 15:34

P0155 is a fault in the heater circuit (sensor 1 upstream) , . Have a good look at the wiring to the sensors. It has been known for the sensor wiring to be touching the exhaust pipe, causing a short circuit. Also check the connector to the sensor , and the sensor itself for signs of damage.

21st May 2021, 10:49	#1
Shuriken_57 Avid contributor Rover 75 Join Date: Jan 2019 Location: Freyming-Merlebach Posts: 212 Thanks: 104 Thanked 21 Times in 12 Posts	O2 sensor Bank 2 Sensor 1 Hello gentlemen, I continue my research following my problems with the 75 v6. I fixed the fuel and coolant leak. My idle isn't smooth and the exhaust is noisy. I made a diagnosis and got the error codes P0155 AND P0151. I changed the O2 sensor located near the lower engine mount but fault codes reappear. What do you think? Is this the O2 sensor? https://www.the75andztclub.co.uk/for...7904580401.jpg Thanks for your help. Last edited by Shuriken_57; 21st May 2021 at 10:57..

21st May 2021, 15:34	#2
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,069 Thanks: 1,842 Thanked 623 Times in 469 Posts	P0155 is a fault in the heater circuit (sensor 1 upstream) , . Have a good look at the wiring to the sensors. It has been known for the sensor wiring to be touching the exhaust pipe, causing a short circuit. Also check the connector to the sensor , and the sensor itself for signs of damage. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.