I just today purchased a White 2003 S-Type R, Onyx over beige with 189,000 miles, NO RUST, very well cared for overall. New Conti DWS 06 tires, oil, wiper blades. Throwing a code for P0037, which many of you know is a heated circuit oxygen sensor. Comes with some needed parts including the sensor etc. Ohio, Mass., and FLA car. One and only owner, he gave it up after turning 81 and running over a parking stop block. Nearly unnoticeable damage to front lower fascia. Runs and stops straight, rotors, calipers, and pads very good. Rims are round except for rear passenger. $4,100 before tax.

I'm looking forward to working on this car myself, and the first task is the sensor.

My question is - is it a good idea to replace all the O2 sensors at same time? Or is it "fixed" by replacing just the one ID'd by a scan tool?

Thanks

And - car had oil change in 5-10-22. specs says 6.9L with filter, shop put in 6.4 L of Valvoline synthetic 5w-30. Oil today was 2 and 1/4 quarts Low as it took that much Mobile ! I had on hand to get it full. I do believe I'll have to keep an eye on this.

 

nice car....my is onyx white also....the jaguar paint is the best....i wax once a year and when washed it is a mirror...the o2 sensor deal is your choice....i like to change them in pairs, especially the front ones....use oem ones or you will be sad.....should be denso, but compare yours first....take note of the color too....i find on my r they are a little black because of the high fuel rate but work fine....a marginal cat will reek havoc with these things too.....happy driving....i do all my own work too except tires....if not i could not afford to have it

 

Scottjh9

Thanks for the reply - the other thing that is interesting about the S-Type is that the 3 offerings of 3.0, 4.0, and R, are so completely different in feel, apparent size, seating etc. The R I have seems small in comparison to the others, much tighter in its construction, and spoty in its front seating. The back is much more cramped than the other 2 cars.

 

I have an 06. Some changes were made after 05. I do not know exactly what. I am 6 5 and fit nicely up front. But no one except a leprechaun could ride behind me. Ride is a little stiff but i like the handling. Pretty nice design for being that old. Get it to about 130mph and you will appreciate the features of the suspension. Double check all fluids especially the trans and eyeball all suspension rubber including grease boots. There is a thread on what have you done to your s type. Give it a read and it covers a lot of possible repairs

 

I have a Sov and a 2001 S-type. As in any Jag, you have a different car when travelling below 100kph and a completely different one running over 100kph.

 

No need to replace them all. P0037 is for the heater circuit on the downstream sensor on bank 1. The two downstream sensors are the older narrow band style and are not expensive. If you want to be positive the sensor is at fault, you can swap with the same sensor on the other side and see if the fault follows. The same fault on bank 2 would set code P0057:

http://www.jagrepair.com/images/Auto..._OBD_II_R2.pdf


The two upstream sensors are a newer wideband (read: expensive) style. I wouldn't touch them unless specifically faulted.

 

kr98664

Thanks for your reply - I will begin and change that downstream sensor - it seems, from the YouTube videos that exist, that it is not a difficult task whatsoever ever.

The car runs very smooth and is not dripping anything and seems to be holding the oil 2.25 quarts of oil I topped it off with.

I hope that continues.

 

Scottjh9

I can't wait to get it out on the road. I Don't want to drive it extensively until the O2 sensor is replaced.

And I'll have to be careful with the speed thing - You're more courageous than I - I've had my 05 Super V8 up to 110 for periods of time but beyond that my car is not in that kind of condition and lacks the adjustments of the air ECATS - ie, lowering when hitting 100mph.

Also 2 speeding tickets in back to back weeks, (thankfully below 90mph) have put a damper on my speed enthusiasms.

I need to post pics of both my Jags, especially the S-Type - Even after 20 years and nearly 200K miles, the steering wheel looks new with no wear whatsoever.

Mike D

 

All,

So after reading various threads on this repair the following is correct:

- P0037 is downstream (after converter) on Bank 1 (right side from the perspective of sitting in drivers seat).

- And the connector is black in color for when purchasing and actually doing the repair.

- And for downstream O2 sensors, they are the same part number on both sides? Meaning there is not a sensor specific to Bank 1 and Bank 2?

So - Carparts.com has DENSO interchange part number 2344798 - it does not specifically say heated but this is an OE part by DENSO "guaranteed" to fit by the website filter

All of this correct?
Thanks
Mike D.

 

@RoadMaster2, the downstream oxygen sensors are VIN-specific and can be installed in either cylinder bank. Depending on your vehicle's VIN, the JLR part number is most likely C2C25956, there is most likely a Denso aftermarket sensor that can work, but it is always best to check the part number for fitment against the VIN before ordering a part.

 

NBCat

C2C25956 does indeed fit my car - this part fits to N52047 and my car is M51001. Now the question is to use the aftermarket OE Denso part (likely good quality for about $90) or the original OEM replacement which is lots more expensive ($276) from like a online Jag dealer.

Thanks for your help NBCat - I appreciate the reminder to check fitment against the VIN.

 

for the downstreams you can use the ebay specials to be honest it’s really hard to screw up a part like that i’ve had one on my car forever. upstream widebands absolutely need to be denso, part is 234-9030

 

+1 on xalty's comments.

The aftermarket Denso unit would work well if cross referenced against your VIN.

 

NB Cat and others in this thread who have commented on the O2 downstream sensors -

This thread is now old but I finally got around to having my shop install the O2 sensor.

Bought from Rock Auto, I referenced the part number against the VIN as suggested (as above), and interchange part number 234-4798 (Denso) matches with OEM C2C 25-956.

And to my surprise the connector does not fit (match) the connector on the car.

Checked part number again with a chat on Parts Geek and they came up with the same part numbers as above.

I'm really surprised this part does not fit - ideas as to why? and what is the right part? Can one splice this in somehow?

I did not ask my shop what they thought the correct part number is.

Thanks
Mike

 

If memory serves, the connector can be changed to match the wiring harness plug.