Question about 2004 Jaguar X-Type

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I have a jaguar 2003 that have a check engine light on. I have change the O2 sensor bank 2 but the light is still on. The vehicle is driving fine.

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  • RL3080 Oct 14, 2008

    WHAT IS THE ROAD TEST SEQUENCE??


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1 Answer

I assume you have cleared all the fault codes (eg. P0150 - P0167) and the Jaguar generic code (eg: P1000)?

Often the problem is that you know you have fitted the part - but the car's computers don't know and so they have to be 'told'.

Clearing the DTC codes is relatively easy with a decent Code Reader (EOBD CAN) but the Jaguar Generic code is sometimes not so easy as there is a road test sequence that often has to be performed before the 'Engine Light' (MIT) goes out permenantly.

A local MOT Garage often has a Code Reader gadjet and charges around a modest £30 to sort it.

Posted on Jul 31, 2008

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I just changed the o2 sensor bank 1 sensor 2


Well, FIRST let me ask you what does B1S2 mean to you?

Bank 1 means it is the same side as the #1 Cylinder
Sensor 2 means it is the Sensor DOWN STREAM or AFTER the Catalytic converter..

With this being said... Are you sure you changed the correct O2 Sensor?

The Second thing that I need to tell you is this... Because it says O2 Sensor. Majority of the time it is the Sensor, but it could be other things... Broken Wire, Computer, Fuel Pressure and if it is DOWNSTEAM... Then it could be the CAT.

THEN.... I looked up and see that it was a HONDA and low and behold it occurred to me...

WHERE DID YOU GET YOUR O2 Sensor From? (this is where I saved so many people)...

Honda has made the variables so TIGHT that an AFTERMARKET O2 Sensor does not work....

If you have a ULEV Vehicle (Ultra Low Emissions Vehicle), you are pretty much forced to get the Sensor from Honda....

That would be my FIRST GUESS.... Get the HONDA Part...

Apr 05, 2013 | 2003 Honda Odyssey

1 Answer

2003 jaguar s type r 4.2ltr. check engine light still on after replacing o2 sensors for code po172.can anyone help?


Don't think the sensors were the problem

You never change the rear monitors anyway

You use the code & reference material, to diagnose
what the code tells you,doubt that was done

Look at fuel trim on that bank, it should be rich

Check & clean MAF Sensor & all intake ducting for vacuum leaks
Smoke test intake & manifold, as well as exhaust before cat if you need to

If fuel pressure is good & only one bank is rich scope O2 Sensor
to confirm then scope the injectors on that bank & you will se if they stick

May have to remove all injectors & mail away for ultra sonic cleaning

Feb 17, 2013 | Jaguar S-Type Cars & Trucks

1 Answer

Engine check light on error code 1 is P0171 system too lean bank 1 error code 2 is P0174 system too lean bank 2


P0171 system too lean bank 1
P0174 system too lean bank 2
links to information on the codes

it means that the O2 sensors in your vehicle detected a lean condition in their respective banks. this could be caused by a dirty MAF (mass air flow) sensor or a vacuum leak downstream from the MAF sensor

sometimes you can clean the MAF with electronics cleaner or brake cleaner but be sure to take it off the vehicle first. be careful not to damage the MAF while spraying the cleaner, and allow it to dry completely before installing it on the vehicle.

May 21, 2011 | 2001 Jaguar S-Type

1 Answer

Check engine light came on though the car runs fine. Mechanic said the code was p0153. He reset it and had me drive it around 'till it came on again. Came on two weeks later.


Why would a mechanic tell you to drive a vehicle
with an O2 Sensor Code, and why clear the code?

Plain stupid

PO153-O2 Sensor (Bank 2 Sensor 1) slow response

Just buy the sensor and replace yourself.

It is slow because it is worn out,most likely over
100,000 miles on it

Replace both front sensors ,if you have 2,the ones
closest to the engine

Apr 22, 2011 | Ford Taurus Cars & Trucks

1 Answer

Engine has severe miss @ idle under load. Runs fine when driving. Plug and Plug Wires are Ok. Put on a Scanner and got code Po135.


The DTC (Data Trouble Code) P0135 is for the O2 sensor Heater Circuit Bank 1 Sensor 1. Bank 1 will always be the cylinder bank with the number one cylinder and spark plug, and the number one O2 sensor will be located before the catalytic converter and usually at the rear of the exhaust manifold or just after it. According to the firing order diagram bank one is the cylinder bank that is closest to the fire-wall and there should be an O2 sensor located there around the rear of the exhaust manifold or just after it. If the engine is a 4 cylinder then it will be the O2 sensor before or up-stream of the catalytic converter. Check for any damaged wiring or loose wire connector at the O2 sensor and if they are alright then replace the O2 sensor and then re-set the check engine light. (The auto part store should re-set the check engine light for you if you purchase the O2 sensor from them, and be certain that it is the correct and assembled O2 sensor for your vehicle and not a put together universal O2 sensor)




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Nov 29, 2010 | 1996 Mercury Mystique

1 Answer

Have a code HO2S Heater Control Circuit Low ( Bank 1 Sensor 2 ) What is this? And Where is it ..


its the second O2 sensor after the cat ,four wires cost 45euros and three wires cost 85 euros .not sure what side is bank one though now if engine is a rear wheel drive then its left hand side if front wheel drive then it at the back ,according to my alldata book

Oct 21, 2010 | 2003 Jaguar X-Type

2 Answers

Where is the O2 Sensor located on 2003 Ford Focus? Check Engine Light is on and trouble shooter device says the problem is in the O2 Sensor Heater Circuit, but where is it located.


The code will tell you which O2 sensor it is.
The code will point to either bank 1 sensor 1; bank 1 sensor 2; bank 2 sensor 1; bank 2 sensor 2.

From what I remember with a focus, it should only have 2 sensors, sensor 1 will be located before the cat, and sensor 2 will be located after the cat.

Oct 08, 2009 | 2003 Ford Focus

1 Answer

2003 hyundai tiburon check engine light


You're right, the PO154 has to do with the O2 sensor. The code has the info of Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 1).
Bank 2 is the exhaust manifold that cylinder #2 uses.
Sensor 1 is the sensor in BETWEEN the exhaust manifold and the catalytic converter.
No Activity Detected in the circuit could mean the O2 sensor is dead, or an open/cut wire going to the sensor.
That's about all the info you can get out of that code PO154.

Jun 07, 2009 | 2003 Hyundai Tiburon

3 Answers

Have a 2003 Chevy Impala. Check engine light remains on. Scan showed O2 sensor. Could it be a vaccum leak?


Bank 1 is the rear O2 sensor, but experience says to change both. The front one is right behind the engine in the middle of the engine compartment. The rear O2 sensor is on the top of the exhaust pipe, just behind the catalytic converter. But the same code that shows it is the O2 sensor (which is P0420), is the same code for the catalytic converter, or a vacuum leak. Make sure if you do change the catalytic converter, ensure that the new one is OBD-2 compliant. And the vacuum leak could possibly come from the manifold gasket. Let me know what the problem was!

Mar 11, 2009 | 2003 Chevrolet Impala

2 Answers

Check engine light on


There are only 2 banks in the engine. That means that if it has 2 O2 sensors they may both need replaced. .....More than likeley it has 2 or more O2 sensors. They shouldn't be hard to locate.

Jan 20, 2009 | 2003 Chevrolet Silverado 1500

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