Downstream o2 sensor 1.8 is there one?

brianw · 8th February 2020, 10:55

As in the title really.
Does anyone know if there is there a downstream sensor fitted to the normally aspirated 1.8 Cowley model.
I am getting an error for downstream o2 sensor heater open circuit.
The sensor in the manifold has just been replaced but fault still comes up.
I have squeezed under the car to see if i could see one after the cat but could not see one but visibility was a bit awkward.
I really need some longer ramps so I can get the front up like I can the rear!

suzublu · 8th February 2020, 11:42

There's one on the cat

brianw · 8th February 2020, 12:12

That is what I thought but for the life of me i could not see it.

I dropped the undertray at the back and s
queezed under as far as I could but could not find one or wiring.

suzublu · 8th February 2020, 12:30

According to Rimmers, there's a blanking plug fitted

https://rimmerbros.com/Item--i-GRID001923
But I know for a fact that mine has one

Strange

brianw · 8th February 2020, 12:57

Now it makes a bit of sense seeing that.
I could not see any wiring, nor a blanking plug come to that. Mind you although I looked from both sides I could not see all round the cat.
Perhaps it was only fitted to later models this one hails from 2000.
Thanks for that.

T-Cut · 8th February 2020, 19:24

Here's Rimmer's photo of the front pipe-catalyst section. The sensor is screwed into the socket with a red blanking plug.

TC

mbonwick · 8th February 2020, 21:30

Only post-2001 cars will have the downstream O2 sensor, it only became mandatory with Euro 3 emissions regulation.

8th February 2020, 10:55	#1
brianw Gets stuck in Rover 75 CDT Connoisseur SE Rover 75 1.8 Auto Connie Join Date: Nov 2011 Location: Aldershot Posts: 922 Thanks: 126 Thanked 119 Times in 79 Posts	Downstream o2 sensor 1.8 is there one? As in the title really. Does anyone know if there is there a downstream sensor fitted to the normally aspirated 1.8 Cowley model. I am getting an error for downstream o2 sensor heater open circuit. The sensor in the manifold has just been replaced but fault still comes up. I have squeezed under the car to see if i could see one after the cat but could not see one but visibility was a bit awkward. I really need some longer ramps so I can get the front up like I can the rear!

8th February 2020, 11:42	#2
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,922 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	There's one on the cat

8th February 2020, 12:12	#3
brianw Gets stuck in Rover 75 CDT Connoisseur SE Rover 75 1.8 Auto Connie Join Date: Nov 2011 Location: Aldershot Posts: 922 Thanks: 126 Thanked 119 Times in 79 Posts	That is what I thought but for the life of me i could not see it. I dropped the undertray at the back and s queezed under as far as I could but could not find one or wiring.

8th February 2020, 12:30	#4
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,922 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	According to Rimmers, there's a blanking plug fitted https://rimmerbros.com/Item--i-GRID001923 But I know for a fact that mine has one Strange

8th February 2020, 12:57	#5
brianw Gets stuck in Rover 75 CDT Connoisseur SE Rover 75 1.8 Auto Connie Join Date: Nov 2011 Location: Aldershot Posts: 922 Thanks: 126 Thanked 119 Times in 79 Posts	Now it makes a bit of sense seeing that. I could not see any wiring, nor a blanking plug come to that. Mind you although I looked from both sides I could not see all round the cat. Perhaps it was only fitted to later models this one hails from 2000. Thanks for that.

8th February 2020, 19:24	#6
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Here's Rimmer's photo of the front pipe-catalyst section. The sensor is screwed into the socket with a red blanking plug. TC

8th February 2020, 21:30	#7
mbonwick Gets stuck in Connoisseur SE 1.8 Auto Saloon Join Date: Jul 2015 Location: Kendal Posts: 633 Thanks: 129 Thanked 176 Times in 147 Posts	Only post-2001 cars will have the downstream O2 sensor, it only became mandatory with Euro 3 emissions regulation.