Question about 2004 Ford Ranger

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Oxygen sensor 2004 ford ranger--after replacing the O2 sensor do the codes need to be reset to make the check engine light go out, if so how

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Try and unplug the battery, leave it off for about 5 minutes then go back and plug it in and see if that solves it

Posted on Oct 26, 2008

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Yes you need to reset.
only way is to have it plugged into with a scan tool

Posted on Oct 26, 2008

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1 Answer

Engine check light came on and read oxygen sensor replaced sensor and light came on again, what other conditions would cause this?


Well I would need the actual code to say for sure, but generally the code does not say to replace the sensor.
It says the data coming from the sensor is not valid, or there is a problem with the sensor circuit. So the sensor has to be tested first.
Sometimes the sensor is the problem, but only about 50%.

Apr 09, 2013 | 2004 Ford Taurus

1 Answer

I took my ford freestar to the machanic in town and he replaced all four of my o2 sensors but my check engine light is still on and now it shows that i have a p0054 and a p1000 code now i have to take


code P054 heated oxygen sensor bank 1 sensor 2 heater resistance. code P1000 obd2 moniter testing not complete.get this code when battery power disconnected to the PCM.to fix problem take vechicle to shop they can use a scanner to erase codes reset the PCM.

Feb 18, 2013 | 2004 Ford Freestar

2 Answers

P0138 and p0158


These codes, po 138 bank 1 sensor 2 shorted to voltage and code po158 means bank 2 sensor two shorted to voltage. these are the two rear oxygen sensors in the exhaust system. there two up frt and two in the rear, check the wiring on the two rear sensors, make sure that the wiring is not cut or stuck between metal. if the wiring is good then replace both rear sensors, when you get them ask for the left and right after the cat sensors. or bk1 s2 and bk2s2. after replacing them reset the computer. go to an auto parts sotre or if you have a code reader you can do it. hope this helps good day.

Feb 19, 2012 | 2004 Dodge Stratus

1 Answer

Oxygen sensor replacement


It's something you can with simple tools, you have four O2 sensors. Your going to have to get the truck rescanned or if you have the DTC code, you can find out which O2 sensor has gone bad so you can replace it. Your going to have Two upstream O2 sensors on each exhaust bank, one O2 sensor before the Catalytic Converter, and the last one after the Catalytic Converter. Its like replacing a Spark plug and you can pick up the O2 sensor at any large Auto Parts store with a can of WD 40. Just unclip the wire leads to the O2 sensor and then with a O2 sensor socket or hint close end wrench and hammer, you can remove the O2 sensor from the exhaust pipe. Good luck and be safe.

Nov 22, 2009 | 2004 Chevrolet Silverado 2500HD

1 Answer

2006 Ford Ranger XLT: 6 Cylinder. Engine Light on: Codes I got from reader are: P0304, and P0316.


hi your codes show downstream o2 sensor oxygen sensor evapsystem o2 heater random misfire u need to check these

Nov 19, 2009 | 2006 Ford Ranger

1 Answer

Can i remove the last set of cats on my 2003 ranger and replace it with an exhaust pipe with an o2 sensor hole in it?


your engine light will come one with a p0420 code for catalytic efficiency if you replace it with a straight pipe before the rear oxygen sensor

Sep 08, 2009 | 2003 Ford Ranger Regular Cab

1 Answer

Check engine light is on,codes 171,174,system lean,codes came back as 2 oxygen sensor's before cat/conv,do they need to be replaced or could it be something else causing it, any help would be great!!!


O2 SENSORS ARE BAD MOST LIKELY I WOULD CHANGE THEM DISCONNECT THE BATTERY FOR 5 MIN. ( IF YOU DONT HAVE A SCANNER) THIS WILL RESET YOUR COMPUTER AND SHOULD MAKE THE SERVICE ENGINE LIGHT GO OUT.

May 19, 2009 | 1999 Ford Ranger SuperCab

1 Answer

2003 Ford Ranger/2.3 O2 sensor - How many and Where located ???


Engine Heated oxygen and catalyst monitor sensors—2.3L engine44e2701.jpg

Jan 16, 2009 | 2003 Ford Ranger Regular Cab

1 Answer

O reading for O2 sensors on 98 Ranger XLT


Yes the 98 ranger has 3 02 sensors,they are located in the exhaust system under vehicle,2 of them
are in front of the cataletic converter and 1 behind it.I replaced mine ,reset the codes and the check
engine light still comes on?

Jan 16, 2009 | 2004 Ford Ranger

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