Question about 1990 Isuzu Trooper

1 Answer

How do I identify the wire for the O2 sensor on a 90 trooper 2.8 after removal to determine if it's been cut

Removed motor to replace and not sure if the O2 wire was cut . Going to do 3.4 engine swap. Also information on changing the eeprom from the stock 2.8 t.b.i. To a 4.3 t.b.i. Are they removable in the ecu m. Or do I need to change the entire ecu ?

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  • Isuzu Expert
  • 496 Answers

The O2 sensor wires are White and Black
.

Posted on Nov 23, 2014

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

stormbrewin
  • 426 Answers

SOURCE: isuzu trooper problem!with a 00 3 litre diesel engine not starting

Was it lined up right as the trigger point for the sensor is important.Is the fly wheel fitted one position only that the bolt holes line up or will it fit no matter which position it bolts up Line up the flywheel trigger with the sensor after you have put the engine to Top Dead Centre.Put at tdc and see if the trigger and sensor are together.

Posted on Oct 18, 2008

  • 1 Answer

SOURCE: Alternator removal on 1997 Isuzu Trooper

My son just got the alternator off of my Trooper (1997) and he said removing the wheel is not necessary. He took off 2 bolts from the top and several from the bottom that were very difficult to remove but then the alternator came off pretty easy. He says if it loose then it should come off pretty easy, if it is not loose, you must be missing a bolt somewhere. He also says is you are in our area, call him and he will take it off for $100 =)

Posted on Oct 25, 2008

  • 1 Answer

SOURCE: Starter removal - 1994 Isuzu Trooper

pull the starter away from the bellhousing and turn the drive end upwards then it will come out from the engine compartment tight i know but i have just done mine so i know it will come

Posted on Mar 30, 2009

  • 1 Answer

SOURCE: Fitting 3.1ltr diesel engine to Isuzu Trooper

Yes this is no prob, best get complete 3.1l jeep to do just finished one and it is perfect.

Posted on Apr 03, 2009

kidspeedy
  • 321 Answers

SOURCE: O2 Sensor Problems-1996 Isuzu Trooper

they are very easy to replace .
all you need to do is go to autozone and get the right parts.
then you will find the old parts on the exhaust system.
unplug the first one you find and unscrew it from the exhaust and refit the proper replacment part.plug wire back in.thats all you will need to do on the second one also.after that your done.ask auto zone after that to reset your codes for free with the code checker.then get a can of carb cleaner and spray out the throttle body of all the black carbon around the throttle plate.use a clean rag only.make sure its clean around the plate.
thewn fill your gas tank with supperunlead dont get the crappy gas any more cause it causes the carbon to build up.plus you will get better gas mileage.now your ready for an inspection sticker.
hope this helps
keep me posted
jm

Posted on Jul 20, 2009

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Code p0130 and code p0150


These 2 articles are from another source. They explain exactly what all the causes and cures are for your Codes. The problem seems to be on the #2 bank. P0130 - 02 Sensor Circuit Malfunction (Bank I Sensor 1) Article by
dale.jpg
Dale Toalston
ASE Certified Technician OBD-II Trouble Code Technical Description

02 Sensor Circuit Malfunction (Bank I Sensor 1)
What does that mean? The O2 sensor produces a voltage based on oxygen content in the exhaust. The voltage varies between .1 and .9 Volts, .1 indicating lean and .9 indicating rich.
The ECM constantly monitors this voltage while in closed loop to determine how much fuel to inject. If the ECM determines that the O2 sensor voltage was too low (less than .4 Volts) for too long (for more than 20 seconds (time varies with model)), this code is set.
Potential Symptoms Depending if the problem is intermittent or not, there may be no symptoms other than MIL (malfunction indicator lamp) illumination. If the problem is constant, then symptoms may include one or more of the following:

  • MIL illumination
  • Engine runs rough, missing or stumbling
  • Blows black smoke from tail pipe
  • Engine dies
  • Poor fuel economy
Causes Usually the cause of P0130 is a bad oxygen sensor, however this isn't always the case. If your o2 sensors haven't been replaced and they are old, it's a good bet that the sensor is the problem. But, It could be caused by any of the following:
  • Water or corrosion in the connector
  • Loose terminals in the connector
  • Wiring burnt on exhaust components
  • Open or short in the wiring due to rubbing on engine components
  • Holes in exhaust allowing unmetered oxygen into exhaust system
  • Unmetered vacuum leak at the engine
  • Bad o2 sensor
  • Bad PCM
Possible Solutions Using a scan tool, determine if the Bank 1, sensor 1 is switching properly. It should switch rapidly between rich and lean, evenly.
1. If it does, the problem is likely intermittent and you should examine the wiring for any visible damage. Then perform a wiggle test by manipulating the connector and wiring while watching the o2 sensor voltage. If it drops out, fix the appropriate part of the wiring harness where problem resides.
2. If it doesn't switch properly, try to determine if the sensor is accurately reading the exhaust or not. Do this by removing the fuel pressure regulator vacuum supply briefly. The o2 sensor reading should go rich, reacting to the extra fuel added. Reinstall regulator supply. Then induce a lean condition by removing a vacuum supply line from the intake manifold. The o2 sensor reading should go lean, reacting to the enleaned exhaust. If the sensor operates properly, then the sensor may be okay and the problem may be holes in the exhaust or an unmetered vacuum leak in the engineicon1.png (NOTE: Unmetered vacuum leaks at the engine are almost always accompanied by lean codes. Refer to the appropriate articles for diagnosing an unmetered vacuum leak). If the exhaust does have holes in it, it's possible that the o2 sensor may be misreading the exhaust because of the extra oxygen entering the pipe via those holes
3. If none of this is the case and the o2 sensor just isn't switching or acts sluggish, unplug the sensor and make sure there is 5 Volt reference voltage to the sensor. Then check for 12V supply to the o2 sensor's heater circuit. Also check for continuity to ground on the ground circuit. If any of these are missing, or aren't their proper voltage, repair open or short in the appropriate wire. The o2 sensor will not operate properly without proper voltage. If the proper voltages are present, replace the o2 sensor.
Register now to ask a question (free) Related P0130 DTC Discussions P0150 - 02 Sensor Circuit Malfunction (Bank 2 Sensor 1) OBD-II Trouble Code Technical Description

02 Sensor Circuit Malfunction (Bank 2 Sensor 1)
What does that mean? The O2 sensor produces a voltage based on oxygen content in the exhaust. The voltage varies between .1 and .9 Volts, .1 indicating lean and .9 indicating rich.
The ECM constantly monitors this voltage while in closed loop to determine how much fuel to inject. If the ECM determines that the O2 sensor voltage was too low (less than .4 Volts) for too long (for more than 20 seconds (time varies with model)), this code is set. The code P0150 refers to Bank 2.
Potential Symptoms Depending if the problem is intermittent or not, there may be no symptoms other than MIL (malfunction indicator lamp) illumination. If the problem is constant, then symptoms may include one or more of the following:

  • MIL illumination
  • Engine runs rough, missing or stumbling
  • Blows black smoke from tail pipe
  • Engine dies
  • Poor fuel economy
Causes Usually the cause of P0150 is a bad oxygen sensor, however this isn't always the case. If your o2 sensors haven't been replaced and they are old, it's a good bet that the sensor is the problem. But, It could be caused by any of the following:
  • Water or corrosion in the connector
  • Loose terminals in the connector
  • Wiring burnt on exhaust components
  • Open or short in the wiring due to rubbing on engine components
  • Holes in exhaust allowing unmetered oxygen into exhaust system
  • Unmetered vacuum leak at the engine
  • Bad o2 sensor
  • Bad PCM
Possible Solutions Using a scan tool, determine if the Bank 2, sensor 1 is switching properly. It should switch rapidly between rich and lean, evenly.
1. If it does, the problem is likely intermittent and you should examine the wiring for any visible damage. Then perform a wiggle test by manipulating the connector and wiring while watching the o2 sensor voltage. If it drops out, fix the appropriate part of the wiring harness where problem resides.
2. If it doesn\'t switch properly, try to determine if the sensor is accurately reading the exhaust or not. Do this by removing the fuel pressure regulator vacuum supply briefly. The o2 sensor reading should go rich, reacting to the extra fuel added. Reinstall regulator supply. Then induce a lean condition by removing a vacuum supply line from the intake manifold. The o2 sensor reading should go lean, reacting to the enleaned exhaust. If the sensor operates properly, then the sensor may be okay and the problem may be holes in the exhaust or an unmetered vacuum leak in the engineicon1.png (NOTE: Unmetered vacuum leaks at the engine are almost always accompanied by lean codes. Refer to the appropriate articles for diagnosing an unmetered vacuum leak). If the exhaust does have holes in it, it's possible that the o2 sensor may be misreading the exhaust because of the extra oxygen entering the pipe via those holes
3. If none of this is the case and the o2 sensor just isn't switching or acts sluggish, unplug the sensor and make sure there is 5 Volt reference voltage to the sensor. Then check for 12V supply to the o2 sensor's heater circuit. Also check for continuity to ground on the ground circuit. If any of these are missing, or aren't their proper voltage, repair open or short in the appropriate wire. The o2 sensor will not operate properly without proper voltage. If the proper voltages are present, replace the o2 sensor.
Register now to ask a question (free) Related P0150 DTC Discussions
  • 1996 Nissan Maxima P0150 P0136 P0105 P0130
    I own a 1996 Nissan Maxima, automatic, v6. Started to shut down on me when making stops. Always cranked back up. Changed out knock sensor, starter, air flow, battery cables...few other minor things. Still doing same thing but not near as often. After all this, codes read P0150, P0136 and P0105. Era...

Dec 15, 2013 | 2012 Lincoln MKX Base 4dr SUV 3.7L V6...

Tip

How to Replace the O2 Sensor in Mercury villager?


O2 sensor needs to be replaced when you get low gas mileage in car.
The procedure to replace is as follows: ----
1) There is primary and secondary O2 sensor connector.
2) Do the replacement of the O2 sensor only when the engine is completely cool.
3)You will see primary O2 sensor on the exhaust manifold.The secondary O2 sensor is located after the catalytic converter.
4)Put the car on jack stands on the rack, this will give you proper sensor location in the car.
5)Remove the O2 sensor with a socket wrench and O2 removal tool extension. Turn the O2 sensor counterclockwise to remove.
6) Most of the times the O2 sensor comes out very easily but if its bit hard to remove it then you can use "FREEZE spray" to make it gets loose.
7)The spray will make it come out easily.
8)When the O2 sensor is getting removed, some of the wiring's will also come out.
9)Before removing the O2 sensor, take the note of the wiring's and the position of wiring so while inserting new O2 sensor you don't get confused.
10) Now after you remove the old faulty O2 sensor out. Carefully insert new O2 sensor in same position.
11) And reverse/refit all the wires / parts which you removed while replacing the old O2 sensor.
This will help. Thanks.

on Mar 22, 2010 | Mercury Villager Cars & Trucks

Tip

How to Replace the O2 Sensor in a Buick Century Car?


O2 sensor needs to be replaced when you get low gas mileage in car.
The procedure to replace is as follows: ----
1) The oxygen sensor is located under the car.
2) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
3) The sensor has to be turned a bit then it can be easily removed.
4) Most of the times the O2 sensor comes out very easily but if its bit hard to remove it then you can use "FREEZE spray" to make it gets loose.
5) The spray will make it come out easily.
6) When the O2 sensor is getting removed, some of the wiring's will also come out.
7) Before removing the O2 sensor, take the note of the wiring's and the position of wiring so while inserting new O2 sensor you don't get confused.
8) Now after you remove the old faulty O2 sensor out. Carefully insert new O2 sensor in same position.
9) And reverse/refit all the wires / parts which you removed while replacing the old O2 sensor.
This will help. Thanks.

on Mar 22, 2010 | Buick Century Cars & Trucks

1 Answer

What is the easiest way to replace the pigtail on the harness that conects to the upstream o2 sensor on a 1996 dodge grande caravan 3.3L


Just cut and splice. 1 black wire, 1 grey wire, 2 white wires just color match. You may want to remove the upper intake plenum to gain access though. Might as well plan on replacing the o2 sensor while your at it. If the plug got melted because it rested on the exhaust manifold, you probably wont get it unplugged. Not sure where to obtain a replacement plug though. You may have to hit some salvage yards.

Sep 06, 2011 | 1996 Dodge Grand Caravan

1 Answer

P0130 ox bank 1 senzor 1 engine shaking


Using a scan tool, determine if the Bank1, sensor 1 is switching properly. It should switch rapidly between rich and lean, evenly.

1. If it does, the problem is likely intermittent and you should examine the wiring for any visible damage. Then perform a wiggle test by manipulating the connector and wiring while watching the o2 sensor voltage. If it drops out, fix the appropriate part of the wiring harness where problem resides.

2. If it doesn\'t switch properly, try to determine if the sensor is accurately reading the exhaust or not. Do this by removing the fuel pressure regulator vacuum supply briefly. The o2 sensor reading should go rich, reacting to the extra fuel added. Reinstall regulator supply. Then induce a lean condition by removing a vacuum supply line from the intake manifold. The o2 sensor reading should go lean, reacting to the enleaned exhaust. If the sensor operates properly, then the sensor may be okay and the problem may be holes in the exhaust or an unmetered vacuum leak in the engine (NOTE: Unmetered vacuum leaks at the engine are almost always accompanied by lean codes. Refer to the appropriate articles for diagnosing an unmetered vacuum leak). If the exhaust does have holes in it, it's possible that the o2 sensor may be misreading the exhaust because of the extra oxygen entering the pipe via those holes

3. If none of this is the case and the o2 sensor just isn't switching or acts sluggish, unplug the sensor and make sure there is 5 Volt reference voltage to the sensor. Then check for 12V supply to the o2 sensor's heater circuit. Also check for continuity to ground on the ground circuit. If any of these are missing, or aren't their proper voltage, repair open or short in the appropriate wire. The o2 sensor will not operate properly without proper voltage. If the proper voltages are present, replace the o2 sensor.

Aug 23, 2011 | Volkswagen Golf Cars & Trucks

Tip

How to Replace the O2 Sensor in a Audi All road Car?


O2 sensor needs to be replaced when you get low gas mileage in car.
The procedure to replace is as follows: ----
1) The oxygen sensor is located under the car.
2) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
3) The sensor has to be turned a bit then it can be easily removed.
4) Most of the times the O2 sensor comes out very easily but if its bit hard to remove it then you can use "FREEZE spray" to make it gets loose.
5) The spray will make it come out easily.
6) When the O2 sensor is getting removed, some of the wiring's will also come out.
7) Before removing the O2 sensor, take the note of the wiring's and the position of wiring so while inserting new O2 sensor you don't get confused.
8) Now after you remove the old faulty O2 sensor out. Carefully insert new O2 sensor in same position.
9) And reverse/refit all the wires / parts which you removed while replacing the old O2 sensor.
This will help. Thanks.

on Mar 22, 2010 | Audi AllRoad Cars & Trucks

Tip

How to Replace the O2 Sensor in a Chevrolet Cavalier Car?


O2 sensor needs to be replaced when you get low gas mileage in car.
The procedure to replace is as follows: ----
1) The oxygen sensor is located under the car.
2) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
3) The sensor has to be turned a bit then it can be easily removed.
4) Most of the times the O2 sensor comes out very easily but if its bit hard to remove it then you can use "FREEZE spray" to make it gets loose.
5) The spray will make it come out easily.
6) When the O2 sensor is getting removed, some of the wiring's will also come out.
7) Before removing the O2 sensor, take the note of the wiring's and the position of wiring so while inserting new O2 sensor you don't get confused.
8) Now after you remove the old faulty O2 sensor out. Carefully insert new O2 sensor in same position.
9) And reverse/refit all the wires / parts which you removed while replacing the old O2 sensor.
This will help. Thanks.

on Mar 22, 2010 | Chevrolet Cavalier Cars & Trucks

4 Answers

My trooper is giving like 6 miles to the gallon its a V6 2.8 engine. I dont know where th oxygen scensor connect.


Hello! I have the wiring to your engine and perhaps a solution...The wire color from the ECM on Connector D pin #7 is White/Green and goes to the O2 sensor...The color at the O2 sensor is Black...White/Blue is connector D pin #1...wire colors that have aged are easily mistaken White looks Yellow with age...connect the O2 sensor to D-7...The O2 sensor is White/Green NOT White/Blue (which looks like Yellow/Blue) this wire is the Check Engine Connector...Tell me how many wires are either cut or misplaced? If we eliminate wiring we can concentrate on why your getting 6 miles /Gal...

If the vehicle backfires or runs poorly My next suggestions are to check the plug wires to be sure they are in the correct place...and #2 to check the timing...the left bank=1, 3, 5 and the right bank=2, 4, 6...Firing order is1, 2, 3, 4, 5, 6...CCW on the distributor...Stick with me and we'll have it purring. see timing below...
saailer




11_9_2011_11_53_11_am.gif

Jul 14, 2011 | 1990 Isuzu Trooper

1 Answer

O2 sensor(s) need replacing. Does anyone know where they are located and how difficult it is for the average guy to replace? Also, which ones do I buy,,1 wire, 2 wire, 3 wire, etc.


You do not change any O2 Sensors based on an OBD2 Code

You change sensors,front 2 only at 80,000 to 100,000 miles

You use a 22 mm wrench or special O2 socket.
Some veh use a diffent size

Easy job,they are in the front of the converter
or pipe before it

The number of wires with be year and application
specific

You get an OEM Type, NOT a universal cut and splice

5 minute job per side

Feb 01, 2011 | 1996 Isuzu Trooper

2 Answers

1994 Isuzu Trooper o2 sensor, and other misc. problems.


when you replace O2 the light will not go off you must follow these steps, At 90K intervals, the O2 Sensor light will illuminate. After replacing the sensor you must perform the following procedure to reset the light. 1. Remove the instrument cluster. 2. Remove the tape from the hole marked "B" on the back of the instrument cluster. 3.Find the hole marked "A" and remove the screw from that hole. 4. Install the screw in the hole marked "B". 5. Recover hole "B" with tape. 6. Reinstall instrument cover. Once you travel 90,000 more miles you get to reverse the procedure. I think they should test the water at the places those automotive engineers work at.

Jul 20, 2009 | 1994 Isuzu Trooper

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