I have a 98 VDP LWB 4.0 without supercharger. Last week, I spent the value of the car having the transmission rebuilt including some expensive valve rebuild and replacement of the second clutch (what ever that was). Transmission, after a few twerks and jerks (small sensations really), is running smooth and all is good

However, part of the process of removing the transmission is dropping the exhaust system and mysteriously I began to get a P0151 (O2 Sensor Circuit Low Voltage Bank 2 Sensor 1). My mechanic checked connections and searched for a leak and found nothing. The car has 88k miles (I've owned it for 12 years now) so it may be time to replace those sensors.

Should I go ahead and replace ALL oxygen sensors or simply replace the one indicated. These are the original OEM sensors when the car was manufactured. Recommendations would be greatly appreciated.

Thanks, Tom Howell

 

Lots of different ideas on replacement of the O2's -- I'm in the ....if it is not broken camp.. so I don't replace unless they fail.

That said: IMO you should get the exact replacement ... not a universal. Amazon normally has great prices and sells the OE ... mine was < $100 a few years ago.

 

Hi
It is possible that the O2 sensor to be made by NGK. I have the XJR
NGK made good products.

I use a Android system phone and a ELM327 Bluetooth OBD2 scanner & Torque App or OBD car Doctor to check all the O2 sensor using fuel trim short term value.

Good luck

 

My memory is that it is a Denso ... but whatever it is .. you can get the correct one with the correct length wire and connector .... you don't need to go to the dealer or worry about the connections on a universal

 

You need to make sure the resistance of the heater element (for upstream ones) is correct though. My '98 XJR had 8 ohm heater elements but my 2001 XJR has 2.5 Ohm. I tried putting the 8 Ohm one in the n'01 car bt the P1647 code came back.

I recently replaced it with a 2.5 Ohm "copy" part and I've now got a P0174 (running too lean) fault, so I think it may be important to replace them with exactly the right part. The previous poster was correct in saying they are Denso ones, can't remember the part number but can look it up if you need it.

 

Pls do =)

 

Also. Where is the lower 02 sensors connected (except in the cat), anyone got a picture?

 

all four connections are lined up in the center of the cowl -- under the wiper motor cover.

do a search -- the part number is available .. although I just ordered the part direct from Amazon .. they have the correct part

 

Just to throw this in, there have been folks who had exhaust work done and the O2 sensor harness got swapped around and it caused a fault code. I think the ECU adjusted the wrong bank since it thought the right one was the left one.

 

Hi
This is what i found for you on NGK site.
I use NGK products on my last car a BMW 735IA
NGK Automotive OE Replacement Parts - In Stock for Your Tune-Up! O2 sensor
http://www.ngk.com/Quickwatch.aspx?zpid=19828
http://www.ngk.com/Quickwatch.aspx?zpid=19874

 

I bought Bosch sensors from RockAuto.
I suspect that they are repackaged Denso units.
Good price and came with correct, Jaguar type connectors.

 

Just read it off the broken sensor. It says "Denso 192400-3101 03C19". The last bit (03C19) I'm pretty sure is a date code though because other people I've chatted with have had the same first part but a different date code.

 

Just order the same part . easy ... cheep and not worries

 

1998 Jaguar VDP LWB (X308)

Yesterday, my mechanic presented me with a new Denso as OEM replacement. When he pulled the old sensor, it was a Denso as well. I bought this Jag with 21k miles in 2002 (it currently has 86k miles) so I believe it is safe to assume the Denso that was replaced was OEM installed.

Thanks to all for all the feedback

 

But . . . go back and reread the entry about hooking up the sensors incorrectly: lots of stuff way back about mechs putting the right sensor leads on the left sensor after transmission and engine swaps.

 

Ah, my 1998 XJR has a different sensor, with an 8 Ohm heater coil (2001 XJRs have lower resistance). The part number I mentioned above (Denso 192400-3101) is for a 2001 XJR. Would you like me to read the part number off the '98 XJR sensor?

 

talulah, thanks for the offer. The new O2 sensor appears to be functioning fine.

I attached my AutoTap Diag and logged about 10 miles; both upstream sensors (as well as downstream) reflected good voltages as I stepped through the log. When I logged this activity previously (with MIL (P0151)), there was an voltage obvious discrepancy between bank 1 and bank 2 upstream sensors.

Out of curiosity, should someone know this information, are the O2 sensor plugs below the wiper cover identical for all 4 sensors? One would think that there would be some variance (in the plug) at least between the upstream and downstream sensors. I ask this because someone identified the potential of mixing the sensor plugs. I have a hard time imagining the results if bank 2 was controlling the trim to bank 1.

Thanks to all, my old Jag seems to be running fine now.

 

I looked at the '98 sensor and it had no markings on it unfortunately.
The upstream connectors are the same shape but B (the one that the heater coil goes much more often) is grey and A is black. According to the denso catalogue (http://www.denso-am.eu/media/102388/dels14-0001.pdf) the downstream ones are DOX-0429 (upstream are DOX-0428). The catalogue page 220 shows photographs of both, and the connector appears to be the same.