Question about Isuzu Trooper

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(o2 sensor indicator light cancel switch.) I need to fix this. I changed my o2 sensor and the light hasn't gone off, and it runs the same weather or not the sensor is pluged in or not.

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Could have wiring damaged need to check if signal from O2 sensor is getting to engine ECU.
can see this in data display using tech2 or scanner O2 sensor reading would be around 450mv all the time indicating open circuit(this is a default reading used by ECU)
or with multi meter back probe ECU connector O2 signal wire to see what reading if any getting to ECU.

Posted on Jul 20, 2009

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Posted on Jan 02, 2017

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Changed o2 sensor and trouble code p1131 keep coming up


What make vehicle do you have ? This code doesn't necessarily mean the sensor is bad ! That is why these thing's need to be tested before replacing , check with a scan tool that shows engine data . This code indicates a lean condition ( vacuum leak ) or a ( fuel problem ) P1131 Lack Of HO2S Switch Sensor Indicates Lean Fixed Lean O2 Is the sensor lying

Jun 07, 2015 | Cars & Trucks

1 Answer

Need to know about how to solve the engine check light that turn on.


4 most common causes of engine light on
-oxygen (O2) sensor
-loose fuel cap
-very cold weather affecting airflow under the hood.
-in need of oil change.
check these. As for fuel cap, make sure you crank it around a few times after each fill...very cold weather, you just have to wait. Save your engine with an oil change regularly, and get your mechanic to show you where the O2 sensor is on your vehicle. May just need the contacts cleaned.

Mar 25, 2015 | Cars & Trucks

1 Answer

I have a 2000 Mazda Protege EX, 1.6 L, manual transmission. Car was driving normal but hesitating and Engine light came in. Checked MAF hose & is not cracked, changed spark plugs & coil, but light...


Many o2 sensors have gone bad but 50% of the time when a code is set on a car about an o2 sensor there is another cause which is changing the emissions & setting the o2 code (ex. vacuum leak, bad plug, injector, it could very well be the cat etc.) The root cause of the problem must be found NOT JUST READING CODES! TAKE YOUR CAR ELSWHERE.

Apr 07, 2017 | Jaguar XJ8 Cars & Trucks

1 Answer

I have a ticking sound coming from the rear of the car in between the rear tries sounds like a clock ticking, what is it


An increasingly noisy ticking sound coming from your engine could indicate a lifter malfunction. I once had an exhaust valve lifter 'mushroom' where the cam makes contact with the flat tappet and the lifter wouldn't move up & down smoothly. This kept the exhaust valve from letting out the unspent fuel through the exhaust and the fuel had only one place to go: past the rings & into the oil. My cylinders needed rehoned.

It could be just a lifter gone bad. Unless you're into major HP(say over 400) you've probly got hydraulic lifters. This type builds up oil pressure to take up its 1/8" or so of slack they'll see when the engine hasn't recently run .


Parts Of BMW


Jun 12, 2012 | 2002 Chrysler 300M

1 Answer

2000 Pontiac sunfire 2.2 got code 1137. How do I fix. Car won't start. I changed o2 sensor.


The 1137 OBD2 code is typically an o2 sensor problem as you have indicated, first I would make sure your replacing the correct o2 sensor as there are two (upstream and downstream), although it is possible that a bad o2 sensor could keep your engines fuel injection system from delivering the fuel to your engine, in my experience having a bad sensor typically results in a check engine light and running with a less than optimum fuel air mixture, it does not typically keep your vehicle from starting. If your still getting the 1137 error code after replace the o2 sensor and checking its connecting wires I would start looking for a bigger issue.

May 16, 2012 | 2000 Pontiac Sunfire

1 Answer

I recently bought a 2000 Honda Odyssey and the engine check light is on. I took it to AutoZone and the codes came back as P0136 and P0138. It's indicating the downstream O2 sensor. Today I jacked up...


Your car uses heated oxygen sensors. Once the key is turned on the heating element in the sensor will start heating up. If you leave the key OFF overnight and the sensor is warmer than the surrounding metal, then that would indicate a problem. Running the engine even for a just a minute will heat the exhaust system and the sensor quickly.

Oxygen sensors can maintain their "new" look for a long time. I have romved sensors that are years old and look new on the oustide but have failed. Looking new or old is not a good indication of failure.

Aug 05, 2011 | 2006 Honda Odyssey

1 Answer

Error code" catalyst syatem efficiency


This usually indicates that the catalytic converters are no longer working. This can be confirmed by watching live O2 sensor data on a scan tool. If the downstream oxygen sensor is switching similar to the upstream O2 sensor than the catalytic converter has gone bad.

When you decide to fix it go with a direct fit cat from a reputable manufacturer or get the O.E. cat from the dealer. This will save you from many headaches!

Jan 17, 2011 | Chevrolet Aveo 5 Cars & Trucks

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

2 Answers

Check engine light on


This is a code that is indicating you have a problem with the "bank 1, O2 sensor 1" heater circuit. Bank one is the side of the engine that has cylinder #1, and sensor #1 is the O2 sensor on that side that is before the catalytic converter. This code sets when the computer senses that it either takes too much or too little current to drive the heater inside the O2 sensor. Typically, most shops would simply put a new O2 sensor in this location as it is ten years old and there is a good chance that the O2 sensor has burnt out However, there is a possibility that the driver circuitry has a problem as well.

I would replace the sensor, I believe it is the one on the passenger side between the engine and the cat. After that, you will have to drive it a bit for the code to cancel, or you could have it reset with a scan tool.

Mar 22, 2009 | 1999 Toyota 4Runner

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