02 sensor connection

Bubbas · Sep 24th, 2012, 13:15

ive just bought 2 02 sensors the connections are both black,but the car has 1 grey & 1 black so which plugs into which on mt t-5 ?

TXC · Sep 24th, 2012, 21:02

Looking online (okay, only ebay really), it appears you may have 2x post Cat sensors with the black connector plug. They are likely to be plugged so as you cannot mis-fit them, or maybe just the coulour for I.D.

According the seller, PRE CAT SENSOR OE: 9126546

POST CAT SENSOR OE:8627202

(Other sellers have differing part numbers for OE, but importantly, they are differing between pre/post sensors)

Do you have different part numbers for the new sensors in your hand?

JamesV70R · Sep 24th, 2012, 21:40

They should have different plugs and cable lengths.

You'll probably have a Pre-cat one (Heated) and an after cat one - the one with the shortest lead goes at the front, the longer at the back.

Sep 24th, 2012, 13:15	#1
Bubbas S70 T-5 Last Online: Jan 23rd, 2013 17:18 Join Date: Apr 2012 Location: Walmer	02 sensor connection ive just bought 2 02 sensors the connections are both black,but the car has 1 grey & 1 black so which plugs into which on mt t-5 ?

Sep 24th, 2012, 21:02	#2
TXC Senior Member Last Online: Dec 24th, 2014 20:25 Join Date: Mar 2012 Location: Sussex	Looking online (okay, only ebay really), it appears you may have 2x post Cat sensors with the black connector plug. They are likely to be plugged so as you cannot mis-fit them, or maybe just the coulour for I.D. According the seller, PRE CAT SENSOR OE: 9126546 POST CAT SENSOR OE:8627202 (Other sellers have differing part numbers for OE, but importantly, they are differing between pre/post sensors) Do you have different part numbers for the new sensors in your hand? Last edited by TXC; Sep 24th, 2012 at 21:06.

Sep 24th, 2012, 21:40	#3
JamesV70R Forum Support Team Last Online: Yesterday 21:01 Join Date: Aug 2009 Location: Watford	They should have different plugs and cable lengths. You'll probably have a Pre-cat one (Heated) and an after cat one - the one with the shortest lead goes at the front, the longer at the back.

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