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Cant find where the o2 sensor is on my 1988 f250 7.5l engine

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The 02 sensor is located in the exhaust system in the y pipe were they join,it is a single wire connector that connects to the 02 sensor.

Posted on Apr 05, 2011

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Codes po171 , po136


PO171 is the 1st o2 sensor on bank 1. With that said a vacuum leak will also throw this same code so before I go changing an o2 sensor I would completely go over the engine and look for a vacuum line or intake leak. PO136 is the o2 sensor bank 1 the second sensor in the exhaust. Again here are some of the things that can cause this code. ( I always look for a vacuum leak somewhere first)

Jul 06, 2014 | 1988 Ford Ranger

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Will the Oxygen sensor on an 1988 oldsmobile 88 cause the engine to die after the engine warms up. Engine size is 3800


no ,O2 sensor will go all the way up out of range and the car won't stall,you will have multiple code set in PCM.

Sep 14, 2013 | Oldsmobile Delta 88 Cars & Trucks

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My car keeps dying when temp.gos up


your front oxygen sensor/lambda sensor is broken. you need to replace it. it stalls because o2 sensors start to work at higher temperatures(when cold car uses previous know error free mixture ratio - rich mixture). when engine is warmed up, your o2 sensor cant read correct values and engine controller cant decide on required amount of fuel to be burned in chamber.

Nov 19, 2011 | Pontiac Cars & Trucks

1 Answer

Have a 1988 Cadillac DeVille 4.5L TBI. It's stalling and hesitating when put in gear. Changed plugs,cap,rotor, and wires. still has an issue. service light comes on and goes off and comes on again....


Changing the fuel filter isn't a bad idea prior to getting into the O2 sensor. You may want to consider replacing the TPS (throttle position sensor). Do an on board diagnostic test to identify the areas of concern. Most likely you'll get error codes for both the MAF sensor and the TPS.

Jul 17, 2011 | 1988 Cadillac Sedan DeVille

2 Answers

Honda Legend 1988


your o2 sensor hooks into your exhaust system. where it goes into the exhaust their will be a wire connector somewhere close by unless it melted away or is gone you wont see where it goes into the computer

Apr 15, 2010 | 1988 Acura Legend

1 Answer

Cant find o2 sensor wire in engine??


under the vehicle screwed into the exhaust system one before and one after the cat converter

Apr 09, 2010 | 2003 Hyundai Tiburon

1 Answer

When i step on the gas it wants to cut out.but if i let up abit it stops could it be a senser


one of two tps sensor or o2 sensor unless you have injector leak. .2.2 re engine? throttle position sensor or oxygen sensor.

Nov 24, 2009 | 1988 Toyota Pickup

1 Answer

I have a 1988 ford mustang 5.0 efi. I want to put an after market exhaust on it, How do I put my O2 sensors on it?


The O2 sensors are mounted into the headers. If by aftermarket exhaust you mean a cat-back exhaust system with midpipes and mufflers, then the O2 sensors are a non-issue - they won't be touched. If you are doing cat-back, headers, and maybe high-flow cats, the O2 sensors will just screw directly into the new headers - they'll be set up to receive them.

Apr 21, 2009 | 1988 Ford Mustang

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