Question about 1990 Jaguar XJ6

1 Answer

Fuel fail 26

That is what the onboard diagnostics tells me. I did a bit of research and found out i have to change the oxygen sensor. I bought the sensor now i don't know where in the car i can go to change it. Can i do this my self. I know it's by the exhaust manifold but where exactly???

Posted by on

  • mendozafamil May 11, 2010

    i have a jag 1990 xj6 it has a electrical problem the mecanic said he is $96.00 hour he has had it for 5 days costing me alot the car cost me 5000 i owner 10.0 perfect ran perfect it just shut off after a 10 min drive my q is doesn t the shop have a certain time to get the job done .

    or can they just say it took 15hours that will be 2000 dollers sir

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 110 Answers

After the manifold, on the catalytic convertor,  look for the wires going to it

Posted on Nov 06, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Idle high warm


If the tailpipe is sooty this is a tell tale sign of running too rich. (Not enough oxygen for the fuel). This could be due to a clogged vaccum line along with a failing throttle position sensor. These can be removed from vehicle and checked with a multimeter to determine if the unit is failing/failed. A diagnostics scanner may shed some light on this if a sensor has failed as it may have a code tripped in the ECU

Aug 19, 2014 | Cars & Trucks

3 Answers

7e8 engine code


Catalyst System Efficiency Below Threshold (Bank 1) What does that mean?



The catalytic converter is a part of the exhaust system that looks kind of like a muffler, although it\'s job is very different from that of a muffler. A catalytic converter\'s job is to reduce emmissions from the exhaust. The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 (or in your case, a 7e8 code) code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). Catalytic converters are not normally a "wear" type item, that is they are not deisgned to wear out and need replacement. If they have failed, it is likely due to something else that caused it to fail. Symptoms The main symptom to the driver is the illumination of the MIL (malfunction indicator lamp). You will likely not notice any drivability problems, although there may be symptoms. For example, if the substance inside the catalytic converter is broken or failed, it may be restricting the exhaust which will result in a feeling of reduced power output from the vehicle. Causes A code P0420 may mean that one or more of the following has happened: Leaded fuel was used where unleaded was called for A damaged or failed oxygen sensor (HO2S) Downstream oxygen sensor (HO2S) wiring damaged or connected improperly The engine coolant temperature sensor is not working properly Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe Retarded spark timing The oxygen sensors in front and behind the converter are reporting too similar of readings Leaking fuel injector or high fuel pressure Cylinder misfire Oil contamination Possible Solutions Some suggested steps for troubleshooting a P0420 error code include: Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required. Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady). Inspect the downstream heated oxygen sensor (HO2S), replace if necessary Replace the catalytic converter Overall probably the biggest mistake vehicles owners make when they have a P0420 code is to simply replace an oxygen sensor (H02S). It is important to do proper diagnosis so you\'re not wasting money replacing parts unnecessarily. We strongly recommend that if you need to replace the catalytic converter that you replace it with an OEM unit. Second choice would be a high-quality replacement part. There are many stories in our forums where folks replaced the cat with a cheaper aftermarket one only to have the code return shortly thereafter. One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it\'s out of it\'s bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It\'s worth checking into.

Jul 22, 2014 | 2005 Ford Focus 1.6

1 Answer

What does obd 1 code 25 and 26 mean?


EOBD II Error Code: 25
Description:
System too Lean, Bank 1
Possible Causes:
- Intake/exhaust leak.
- Secondary air injection (AIR) system.
- Manifold absolute pressure (MAP) sensor.
- Mass air flow (MAF) sensor.
- Fuel pressure/pump.
- Injector(s).
- Evaporation emission (EVAP) canister purge valve.
- Heated oxygen sensor (HO2S).
- Contaminated fuel.

EOBD II Error Code: 26
Fault Location:
System too Rich, Bank 1
Description:
- Evaporation emission (EVAP) canister purge valve .
- Fuel pressure.
- Injector(s).
- Heated oxygen sensor (HO2S).
- Contaminated fuel.
Hope that works.

May 24, 2014 | 1995 Toyota 4Runner

1 Answer

How do you know if you need an oxgen sensor for a Nissan Xterra


The onboard computer maintains an air/fuel mixture at 14.7 to 1, if one of the oxygen sensors is failing it will change the air/fuel mixture for engine combustion. When this happens the onboard computer detects that the air/fuel mixture is out of range and sets the "check engine light" to come on, on the dash. When the computer is scanned for fault codes it will relay back information as to the cause of the problem. If an oxygen sensor is detected as operating out of its range, a specific code number is displayed through testing equipment that reads 'fault codes' and it will display which one is faulting. Hope this helps.

Apr 16, 2014 | Cars & Trucks

2 Answers

What does the codes p0442,p0136 &p0141 mean on my 2001 ford taurus it failed inspection for these codes


P0442 FORD - Evaporative Emission System Leak Detected Small Leak

Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
P0136 - O2 Sensor Circuit Malfunction Bank 1 Sensor 2
Possible causes- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Rear Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

P0141 FORD - O2 Heater Circuit Bank 1 Sensor 2

Possible causes- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)

Sep 27, 2012 | 2001 Ford Taurus

1 Answer

Changed sensor 1 bank 1 and found I have four on 96 Yukon makes noise like putting underneath. Now want start. Wuts wrong


tell me did, did skipping start after you replace oxygen sensor or did vechicle already have skip before sensor change if so skipping can be caused by intake leak,bad spark plugs and wires,could have restricted fuel filter, weak fuel pump or weak ignition coil. if skipping occur after you replaced oxygen sensor could have loose sensor or cross thread sensor threads causing exhaust leak around oxygen sensor.

Aug 26, 2012 | Cars & Trucks

1 Answer

How do you change the o2 sensor on a 2003 impala


I wouldn't trust anything the Zone tells you. Most oxygen sensor codes are NOT caused by the oxygen sensor. Of coarse, a lot has to do with WHICH O2 sensor code you have. For example, codes P0130,P0131,P0132,P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0171 and P0172, are all valid oxygen sensor/fuel trim codes for a 2003 Chevrolet Impala equipped with a 3.4L V-6 engine.
How you would go about troubleshooting the problem depends on which "oxygen sensor code" you have. Many times, the code can be fixed by simply repairing a leak in a vacuum hose. Quite often, these codes are caused by faulty mass airflow sensors. Then again, every once in a while, the problem is actually the oxygen sensor itself. However, if you go by the knowledge and experience in diagnostics that exists at the Zone, you will be changing an oxygen sensor EVERY time. Then when that does not fix the problem, you will be out the cost of the oxygen sensor, PLUS you will STILL have to diagnose the problem to fix it!

Many people think that all an automotive repair technician does is plug in the "magic box" and replace all the parts that the box (computer) tells them to replace (and the people at the Zone like it that way). TRUST ME, it does not work that way! I WISH it was that simple.

FYI: On Board Diagnostic (OBD) Diagnostic Test Codes (DTCs) NEVER tell you what parts to replace. They are called DTCs because for a trained technician, they tell him which of the hundreds of DIAGNOSTIC TEST ROUTINES to perform in order to diagnose the fault and pinpoint the CAUSE of the problem.

Just a little professional advice from someone who has been diagnosing and repairing cars for about 37 years...do with it as you will.

Mar 22, 2012 | 2003 Chevrolet Impala

1 Answer

It is a v8. i am loosing power and catalytic converter gets cherry red. i had replaced all three converters and still having the same problem.


Check the EGR valve and the oxygen sensor.
Either can cause problems with fuel mixture.
Run a computer diagnostic on the vehicle; the onboard computer knows what's going on and should be able to tell you what needs attention.

Mar 13, 2011 | Lexus SC 400 Cars & Trucks

1 Answer

Bmw 330ci m sport automatic 2001 makes a clinging sound when accelerating engine management light on and diagnostics says 228-e4-fuel trim bank 2- too lean. 227-e3-fuel trim bank 2- too lean its not...


Explanation:

According to my research and the BMW master mechanic, basically your oxygen sensor is getting an abnormal reading. The abnormal reading will result in the sensor being unable to adapt beyond its +/- 10% threshold to adapt for the fuel/trim mixture. Therefore, either your car is going to run too lean (not enough fuel) or too rich (too much fuel).

Problems:

1) Either your pre-cats oxygen sensors are bad.
2) Fuel pressure regulator
3) Leak in the air intake /vacuum system

I would think that it is probably your oxygen sensors. Replace that and you should be good to go. Thanks for rating my response and for using FixYa!

Jun 30, 2009 | 2001 BMW 330

2 Answers

1999 cougar diagnostic code p0430 and p0420


Failed or faulty oxygen sensor, or faulty catalytic converter. It's actually the oxygen sensor reading that the catalytic converter is not functioning properly & needs relacement. That's provided the oxygen sensor is not faulty, which personally, I'd go for that first.
Both would explain excessive fuel usage.

Jan 21, 2009 | 1999 Mercury Cougar

Not finding what you are looking for?
1990 Jaguar XJ6 Logo

Related Topics:

155 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jaguar Experts

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Raygin
Raygin

Level 2 Expert

322 Answers

yadayada
yadayada

Level 3 Expert

61249 Answers

Are you a Jaguar Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...