Advice sought on the why's n wherefores of lambda sensor connections. Thought I had got through the hardest bit when I managed to get the old sensor out and had screwed the new one in.

However, the new connector has slightly different lugs to the old one and therefore has absolutely no chance of fitting. Bought the new one from Euro car parts, supposedly the right Denso for my car: DOX 0429

Any ideas on how to get a sensor that fits?!
Have attached a few pix too...

 

I looked on "eurocarparts.com" and sure did not see that part number referenced for a MY 2001 XJ8. I can offer advice to check and make sure whatever part number you buy does NOT also reference MY 1998 Xj8s- since they are different. Your car has an AJ 27 engine and uses a wideband sensor in the precat position and they are pretty readily available AFAIK.

 

The choice does seem to differ depending on the day I search the eurocarparts site, and right now it's only showing 3 choices versus the 4 given yesterday. A slightly suspect database?

Do the pre versus the post sensor connectors differ? (I've gone and put everything back together after having this possible brainwave).

 

I dunnoh!

 

The later cars used a different sensor. I remember being surprised when I had to get one for my 2002 XJR.

I used Amazon in the USA

 

Hi Chris,

I hate unsolved mysteries like this, but unfortunately the answer doesn't seem to be as easily discovered as it should be.


Upstream O2 Sensors:

According to the U.S. Denso Part Finder, the upstream sensors for a 2001 XJ8 4.0L are Denso part number 234-9016:

Find My Part | DENSO Auto Parts

According to jaguarclassicparts.com, from VIN F06183 the correct Jaguar part number is LNE1684BB, and the sensors are the same for both the supercharged and normally-aspirated engines, which will be important later:

Heated Oxygen Sensor - Parts For XJ Series from (V)812317 to (V)F59525 (X308) | Jaguar Heritage Parts UK

Rock Auto has an info page on this sensor here, which shows the connector:

More Information for DENSO 2349016

This U.K. vendor shows Denso 234-9016 is Jaguar LNE1684BB, but does not give a DOX number equivalent:

Lambda Sensor LC10151

Here's the link to the latest Denso U.K. Lambda Sensor catalogue, which includes sensor part numbers for S-Types and X-Types, but unfortunately not for XJ saloons:

http://www.denso-am.co.uk/media/102388/dels14-0001.pdf

So, how to cross reference those part numbers to the DOX numbering system? According to this DIY for 1998 and 2001 XJR O2S replacement, the correct Denso part number for the 2001 is DOX-0428. The author also gives some other cross-reference numbers, and he shows photos of the sensor and harness connectors which may be helpful to you:

Lambda Sensor

So if it's the upstream sensor you need, perhaps it should be DOX-0428 instead of DOX-0429.


Downstream O2 Sensors:

The Denso Part Finder shows the downstream sensors are part number 234-4798, and Rock Auto has this info page:

More Information for DENSO 2344798

jaguarclassicparts.com shows the Jaguar part number as LNE1682BC.

This vendor claims his Denso sensor is correct for Jaguar part LNE1684BB and LNE1684BA, and the electrical connector is shown:

Jaguar Lambda Oxygen sensor Offical Denso part LNE1684BB, LNE1684BA, C2N3717 on eBid United Kingdom | 75884049

This knowledgeable Jaguar parts seller states that the downstream sensor, LNE1682BC, is Denso DOX 0429:

Jaguar s Type Oxygen Lambda Sensor Downstream 2 5 3 0 4 0 4 2 V6 LNE1682BC New | eBay


So it appears that the DOX-0429 sensor you received is correct for downstream, but not upstream.

I hope this info is helpful.

Cheers,

Don

 

Don, that's practically a doctoral thesis in automotive IT.

 

Quoting:
"So, how to cross reference those part numbers to the DOX numbering system? According to this DIY for 1998 and 2001 XJR O2S replacement, the correct Denso part number for the 2001 is DOX-0428. The author also gives some other cross-reference numbers, and he shows photos of the sensor and harness connectors which may be helpful to you:"

Not to quibble, but for someone attempting to use the article to troubleshoot, he makes a good suggestion to check the heater circuit resistance, but his table gives values for resistance labeled in "W', which means watts. I dunnoh if it is really ohms or watts he is defining.

** Edit**
ALSO - I read this statement to mean that the sensors for these two cars are the same, which is not what the article says- nor is it true.

 

Well, due to the way the eurocarparts website worked, I was only able to choose the Denso 0430 lambda sensor.
Thankfully it was the right fit for the pre cat position, and also appears to run ok in the car too. Not sure if there's a huge difference with the 0428 suggested, but I'm very glad to have got this far! :=)

After a couple of test drives, the hesitation that I used to experience when taking off from a dead stop, or accelerating onto a roundabout, has now disappeared and it's like having a real jaguar at last! The power delivery is also much much smoother... The after burners don't kick in like they used to.

I take my hat off to Don & Sparkenzap for helping me retrieve the "new" car!