Oh, Ok means nothing specifically good about the CAT. You were right, the scanner reads now INC for MIS, CCM, CAT, EVAP which were OK before I erased the code. Should I drive the car right now, shortly after erasing the codes or I can do it when I come back from an out of state trip (What happens if I do not drive the car for a week?), and how many short and how many long trips I should have (now or after a week)?

RE: the sensors you recommended, I see a big price difference from different vendors:
Bosch $93.99 (AutoZone) vs. $80.29 (CarParts),
Denso $99.99 (AutoZone) vs. $ $57.78 (CarParts),
NTK $183.99 (AutoZone) vs. $58.90 (CarParts).
Could this mean that the sensors sold by CarParts will not have the quality of the ones sold by AutoZone?

 

marcela: Drive Mona as you normally do, and park her a week while out of town. As you drive, the engine computer - ECM - will complete the test cycles and change the readiness settings from INC (incomplete) to OK (complete). Some will complete quickly on suburban streets, and other's require a few miles at highway speeds. To be honest, I simply drive my X-Type a day or two as I normally do on the highway and on suburban streets, and the test cycles are complete.

Here's Jaguar's definition of the driving conditions to complete the test cycles:

Short Drive Cycle:

• Start the engine.
• Allow the engine to idle for 30 seconds.
• Raise the engine speed to 1500 rpm and hold for 3 minutes until a temperature of 70ºC (158 ºF) is achieved.
• Allow the engine to idle for 30 seconds.
• Switch off the engine.

Long Drive Cycle:

• Accelerate to 55 mph (88 km/h) in 5th gear and cruise for 2 minutes with the engine speed at or above 1800rpm.
• Lift off the throttle and allow the vehicle to decelerate until the engine speed is less than 1000 rpm.
• Stop the vehicle.
• Release brake, allow the vehicle to move with no throttle for 1 minute.
• Road test is now complete.
  

 

marcela: Oxygen sensors from Bosch, Denso and NTK are all good quality. The price varies a lot by vendor, so simply look for the best price, often on eBay or Amazon for $50-60, below. Get a Bosch, Denso, or NTK with the correct part number for Mona, and quality and fit will be good, whether it's $50 from one vendor and $100 from another for the identical part.

Downstream Sensors
https://www.ebay.com/itm/BRAND-NEW-G...gAAOSwEetWAt-L

https://www.ebay.com/itm/DENSO-234-4...8AAOSw~gRVxbZK

https://www.ebay.com/itm/NGK-NTK-25607-Oxygen-O2-Sensor-Genuine-Direct-Fit-ir/292519329180?hash=item441b82bd9c:g:TMkAAOSw4ZxazZk b:sc:ShippingMethodStandard!77094!US!-1

Upstream sensors
https://www.ebay.com/itm/Bosch-15627...ss!77094!US!-1

https://www.ebay.com/itm/OEM-DENSO-2...kAAOSwevlZ7q0z

 

So I should change BOTH downstream and upstream sensors. Per each Bank (Should I change both sides, Bank 1 AND Bank 2 too) or only Bank1 as per P0420 DTC shown by scanner? E.g. all four sensors (2 upstream and 2 downstream)?

 

Marcela: If I worked on your 2007 X-Type, I would replace only the downstream bank 1 sensor at this time because:
+ That sensor monitors the performance of the bank 1 catalytic converter, so replacing it may (hopefully) eliminate your P0420 error code
+ Mona has only 78K miles, and oxygen sensors usually last 100+K miles. On my X-Type they worked until ~110-130K miles, so why replacement them before you have to
+ When the oxygen sensors go bad, the error code tells you which one to replace - no guessing
+ The oxygen sensors are much easier to replace if you wait until you must remove the intake air box or the intake manifold for a future, more pressing maintenance need
+ If replacing the downstream bank 1 sensor does not eliminate the P0420 code, you may be faced with replacing the catalytic converter, a pricey choice. How much money and effort you want to spend on Mona vs. the alternatives.
+ The reasons I drive a 16 year old X-Type are: I enjoy working on it, I enjoy driving it, and ...... I'm cheap

Just my 2 cents.

 

What do you mean by "wait until you must remove the intake air box or the intake manifold for a future more pressing maintenance need"? You are talented and speak mechanical with joyful ease. I will never be able to remove the intake manifold feeling that I will mess gaskets & alike. I prefer the suggestion of the 3/8" tool. Only after/if my final appeal of P0420 removal case will fail I will dare to address the catalytic converter replacement issue to a no Jaguar shy mechanic --for example the nearby Ford dealer-- as a (NY) Jaguar dealer terrifies me to death. Unfortunately I do not have any other alternative. Thank you for clarifying which sensor to replace at this time. You say "when the oxygen sensors go bad the error code tells you which one to replace, no guessing": which code?
And what oxygen sensor socket to buy, I read 1/2" drive size and 7/8" socket size on many, what does it mean? Also I read comments that if the exhaust is not hot it is very hard to remove the old sensor: is it? Ouch!
Thanks again and Happy 4th of July.

 

marcela: Let's keep it simple..... Replace only the bank 1, downstream sensor. Do it with the engine in cold. You don't need to buy the special 7/8" socket with a slot for the sensor wires, because you can borrow it for free from most major auto parts stores. They'll charge your credit card when you borrow it, and issue a full refund when you return it a few days later. A picture of the socket is in this post: https://www.jaguarforums.com/forum/x...0/#post1059714

It helps to use a 3/8" socket wrench like this one, which Harbor Freight sells for ~$20, item # 984884: https://www.harborfreight.com/t-bar-...het-98484.html

This post describes how to reach and replace the bank 1, downstream sensor: https://www.jaguarforums.com/forum/x...4/#post1892379

 

I will do it when I am back from NY, thank you.
Meantime I am still confused by the 5 cat mechanic's listing "2A01H/10753 --what is 10753??--UNDOCUMENTED CODE"/ "not found in service information system" in his service report. So he DID see something with the Bank 1 downstream sensor? Or he is upset because he did NOT see anything about this sensor? Do you have an idea when the Common Causes of Jaguar x-type P2A01 OBD2 Code list mentions: dirty oil, air fuel ratio Sensor 1 Bank 1 circuit poor electrical connection, faulty camshaft position sensor, fuel injectors circuit poor electrical connection)? Sensor 1 too? Sabotage? Chipmunks?

 

marcela: Your Foxwell scanner shows only 1 error code: P0420. Stay focused on fixing that.

The mechanic laughed at you and gave you a lot of bad information, e.g., he claimed your X-Type has 5 catalytic converters (it has 2).

 

PLEASE HELP: HOW BIG IS THIS DENSO REPLACEMENT OXYGEN SENSOR PROBLEM --if I found out that same sensor was BOSCH--?
I've just ordered a Denso downstream oxygen sensor from Amazon for Bank 1 when I made a (worrying?) discovery in Mona's past records that I never looked at before: she had a similar P0420 problem in 2015 and the report from the dealer who sold her to me lists "repl 02 sensor --part 15936--, sent car to Jaguar repl cat convertor P0420, P1000". That replacement oxygen sensor was obviously a Bosch sensor. What is going to happen if I replace that Bosch downstream sensor ("part 15936") with a Denso downstream sensor? And what is the story of the catalytic convertor replaced in 2015, just 3 years ago? I am very scared because both downstream sensors (on Bank 1 and on Bank 2 or same bank downstream and upstream) should be the same brand, as I found out after ordering the Denso and I don't know which brand is the Bank 2 downstream oxygen sensor or which brand is the Bank 1 upstream oxygen sensor.

 

If they're compatible they will do. If they're not, they won't. It's not complicated.

 

Hi guys can you tell me which order do I tighten the bolts in. On the lower intake manifold. Is there a diagram available. I have a jaguar x type 2.1 v6 2004 thanks

 

@SB10 = how does your question have anything to do with the thread heading?

Go to the "stickies" on main page and download the Work Shop Manual for directions.

Lower intake is 10 Nm upper is 10 Nm

 

Further to your advice to Marcela, I have located the correct O2 sensor (bank 1 Upstream) and have purchased the correct tool (socket) to remove it but due to space limitations can't attach the ratchet to the socket. I understand that removing the manifold would make access easier. I was just wondering if there is another approach that wouldn't require removing the manifold.

Grateful for your advice.

 

These codes, which sensor do they refer to?
Thank you