Question about 2002 Isuzu Rodeo

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Diagnostic checks show lots of electrical related triggers most related to the O2 sensor (it has been replaced), the car has had a full tune up (filters, spark plugs, oil and lube, throddles) and the fuel injectors have been cleaned, fuel is not evenly delivered car has trouble accelerating and now starting.

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Hi! We have the same problem before but once I replaced the PCM (powertrain control module) everything is fixed. The PCM controls all electrical system in the car including the engine. Hope this helps and have a good one!

Posted on Jul 20, 2010

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Posted on Jan 02, 2017

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2 Answers

How do I replace Oxygen sensor for 07 Explorer Sporttrac


First a question for you? Intake side or exhaust?. Most cars are just a bolt-on type of o2 sensor. If you know which one then simply unbolt it after disconnecting car battery ground and disconnecting o2 sensor. Some sensors from autoparts stores Dont have original plug/jack. You will have to splice the wires/jack to the new one. But if just trying to pass smogcheck I recommend a full tune-up including fitlers for motor and a fuel system treatment. If diagnostic computer says replace probly just replace. Too many things can fail a smog check but no reason stated so this is all I can really say without more info. Good luck.

Nov 23, 2014 | 2007 Ford Explorer Sport Trac

1 Answer

1996 Acura TL check engine light on sets these codes po155, p0141,p0135 how do I fix it?


Okay, so usually when there are a large number of codes that show up at one time they are usually related, so one problem could cause multiple codes to appear. Here is a link to a trouble code reference sheet for the 96 - 98 Acura TL Acura 9698 3 2TL Trouble Code Info

From this sheet we can see that your issues all relate to your o2 sensor heater circuit, so the first step would be to check all your fuses, the problem could be as easy as your o2 heater circuit fuse is blown. next i would check the connections to the o2 sensors themselves, make sure you have good connections and clean the connections with some di-electric grease which you can pick up at any autostore and spray it in both connectors (the wiring harness for the car and the connector attached to the o2 sensor) let them dry then reattach them. if this does not fix the problem sadly you might have to start replacing the o2 sensors. Good Luck

Apr 25, 2014 | Acura TL Cars & Trucks

1 Answer

Engine code 28


Are you sure it is a code 28? I only ask because my book doesn't show a code 28 in regards to this problem. I show codes 25 and 26 that may relate to this problem. But before replacing o2 sensor, there are other probabilities for this code showing up. They would be: Injector or injector circuit, Coolant temp sensor or circuit, Air temp. sensor or circuit, Airflow meter, Cold start injector, ECM (Electronic Control Module- THE BRAIN) Or the o2 sensor of course. Plz save your money before purchasing o2 sensor and check possible related items first.You may find o2 sensor is not at fault. Hope this helps.

Nov 14, 2013 | 1993 Toyota Camry V6

1 Answer

2005 toyota tacoma 2.7 code p0037 replace rear 02 and computer code keep coming back.


P0037 - O2 Oxygen Sensor Circuit High Voltage (Bank1, Sensor2)

The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)

Symptoms: There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.

Causes: A code P0138 may mean that one or more of the following has happened:
* Faulty O2 sensor
* Short to battery voltage in O2 sensor signal circuit
* High fuel pressure (not as likely)


Here are some potential solutions:
* Replace O2 sensor
* Repair short to battery voltage in o2 sensor signal circuit

If you replaced the O2 sensor, then its possible that you have some electrical problem there; reset the codes first, and if this come on again, check in this link TSB P0037 electrical diagnostic procedure.

Keep us updated.

Jan 27, 2011 | 2005 Toyota Tacoma

2 Answers

I went to dealership to have catillitic converter and o2 senor replaced, after service the check engine light came on again and the mechanic said that the replacement of the catillitic converter could...


ask him to show you where the lambda probe is situated(the o2 sensor)(1/2 way down the front exhaust pipe before the cat box)and then ask to see the second o2 sensor(it aint got one,unless you have a V6 MOTOR,THEN YOU HAVE ONE FOR EACH BANK)he is right in saying that it will show up any fuel/timing/injector problems but these will show up on the diagnostic computer that he will have,otherwise how can he say the cat needs replacing etc.....
without a diagnostic computer NO ONE can say exactly what needs replacement.unless its obvious.

Jul 29, 2010 | 2003 Kia Rio

1 Answer

Universal o2 censor has 2 white 1gray 1black existing wires areblack/tan dkgreen/orng blk/ltbl blk/pink


First what do you mean by a universal o2 sensor? You must make sure that you have the right o2 sensor, most newer vehicles have four o2 sensors 2 upstream and 2 downstream, upstream and downstream are meant to show where the sensors are in relation to the catalatic converter,some o2 sensors have 1 wire or up to 4 wires most with four wires are heated o2 sensors so you need to be sure you ve gotten the right o2 sensor for you vehicle as well as the right replacement for the proper location! My experience is that most after market o2 sensors have the same colored wires as the vehicle. Also most o2 sensors have electrical plugs? If you need help finding the right o2 sensor for your vehicle then please dont be affraid to ask!

Feb 12, 2010 | 1996 Jeep Grand Cherokee

1 Answer

2002 ford expedition "service engine soon" light keeps coming on. I've had the O2 sensor replaced three times in the past month, now the next day or two after the sensor replacement the light comes back...


get a new mechanic, need to check for vac. leaks, poss needs tune up. alot O2 codes i have gotten have been created by vacuum leak or warn out plugs, rarely have i had to replace a O2 sensor.

Oct 14, 2009 | 2002 Ford Expedition

1 Answer

2001 Cherokee 4.0 6cyl -- P0161 and P0158 codes


If you do not know what the codes are, it is O2 sensor. This means the computer is not reading the right information from the faulty sensor. (there is a set range the sensor is meant to show, if one goes over or under the computer shows check engine). The diagnostic is not too bad, give the car a tune up, plugs, wires etc. and replace the O2 sensor. This normally clears up any problems. Let me know if you need further clarification or help.

Sep 28, 2009 | 2001 Jeep Grand Cherokee

3 Answers

12 codes; 90174, p0171, p0175,p0300,p0301, p0302, p0303, p0316, p0420,p2195,p2196,92198 what does this mean


I would be very hesitant about just going in and replacing parts/sensors, especially those diagnosed from Electronic Control Module (ECM) Diagnostic Trouble codes (DTC's) alone, as quite often when multiple codes are present, they are often related to a songle malfunction/failure (Such as coil codes, and O2, rich/lean codes, etc...) - A p0171 and 0174 code is not indicative of a faulty MAF sensor - it is a code set when a lean condition is detected within the vehicle's exhaust...often caused by vacuum leaks, EGR valve malfunctions, BAC/IAC ( Bypass/Idle air control) valve malfunction, DPFE sensor malfunction, or the MAF "hot wire" is dirty, and can be cleaned with the correct cleaner, but instead of replacing a $250 MAF sensor; only to later find out that if you had the vehicle repaired by a trained technician, a $3 vacuum hose and a $50 ignition coil had initiated the multiple DTC's - So, sometimes it does pay to use a trained technician; especially with so many codes present - Like I said - If I were going to do the work myself, I would erase all the codes (Disconnect battery cable for about 10 mins - this will also erase the block/learn ECM settings and it may search for idle for a bit, but will straighten out with time - reconnect battery and start the car - then after the light re-illuminates, re-pull the codes, and most importantly test the sensors/parts indicated by the DTC's before replacing anything - that is if you want to fix it the most cost effective way possible, but, if you have plenty of money to waste you could always just go replace whatever the DTC's tell you is out of specifications, regardless of the cause...this might fix it, but may not as well - if you got lots of money and feel lucky it's the way to go - if not, test those parts and sensor before replacing them - there is a process for testing each of them....Thanks

Aug 21, 2009 | 2004 Mercury Sable

1 Answer

Please Help... p0404 and p0137 Error Codes (1999 Saturn SL1)


yes egr valve is a common thing on this saturn. very pricy and yes you need the rear o2 sensor good luck i have a used egr if interested off a sl2

Sep 29, 2008 | 1993 Saturn SL1

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