The largest and best supported Jaguar cars enthusiast site on the Internet!

Serving Enthusiasts since 1993
The Jag-lovers Web

Currently with 3,166 members

Converting To a Three Wire Oxygen Sensor, Series III XJ6

Converting To a Three Wire Oxygen Sensor, Series III XJ6

Doug Dwyer

Until the 1987 model year a single wire (non-heated) oxygen sensor was used. It is generally accepted that the heated, 3-wire sensor will work better. In fact, Jaguar recalled some 1986 California registered XJ6's to install the 3-wire sensor. Here are excerpts from the actual text of the recall.

In essence, this simply involves providing voltage (from fuel pump relay) and ground (to the manifold bolt) for the heating wires of the 3-wire type sensor. A Jaguar parts kit is mentioned but appropriate 3-wire sensors are available from the usual Jaguar suppliers or, by using the Parts Interchange, many regular parts stores.


Disconnect battery.

1) Locate the oxygen sensor in the exhaust system down pipe and disconnect the sensor harness.
2) Remove and discard oxygen sensor.
3) Clean the sealing face and install the new oxygen sensor to the exhaust down pipe.
4) Connect the existing harness and new link harness multi-plugs to the oxygen sensor harness.
5) Route the link harness along the air conditioning return hose and across the bulkhead to the fuel pump relay.
6) Secure the harness using supplied tie straps.
7) Position the fuel pump relay and relay base away from the bulkhead and remove the relay from the base.
8) Position the link harness green/white cable lucar connector into position 87A for the relay base.
9) Install the fuel pump relay to the relay base. Install the base and relay to the bulkhead.
10) Route the link harness ground eyelet to the engine inlet manifold. Tighten the ground mounting bolt.
11) Reconnect the battery and reset clock.

For this campaign, order using the kit, JLM 2037.


Please help support the move to the new site, and DONATE what you can.
A big Thank You to those who have donated already!



Go to our Homepage
Improve your Jag-lovers experience with the Mozilla FireFox Browser!

  View the latest posts from our Forums via an RSS Feed!

Jag-loversTM Ltd / JagWEBTM 1993 - 2023
All rights reserved. Jag-lovers is supported by JagWEBTM
For Terms of Use and General Rules see our Disclaimer
Use of the Jag-lovers logo or trademark name on sites other than Jag-lovers itself in a manner implying endorsement of commercial activities whatsoever is prohibited. Sections of this Web Site may publish members and visitors comments, opinion and photographs/images - Jag-lovers Ltd does not assume or have any responsibility or any liability for members comments or opinions, nor does it claim ownership or copyright of any material that belongs to the original poster including images. The word 'Jaguar' and the leaping cat device, whether used separately or in combination, are registered trademarks and are the property of Jaguar Cars, England. Some images may also be Jaguar Cars. Mirroring or downloading of this site or the publication of material or any extracts therefrom in original or altered form from these pages onto other sites (including reproduction by any other Jaguar enthusiast sites) without express permission violates Jag-lovers Ltd copyright and is prohibited
Go to our Homepage
Your Browser is: CCBot/2.0 (, IP Address logged as on 8th Jun 2023 04:35:04