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On my OB2 computer it tel me the coolant pull up resistor is bad where is that

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Never heard off, what obdii code/codes you have

Posted on Feb 05, 2010


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The brake and abs light just came on in my 2003 GMC envoy 4x4 what would cause it and where to start looking

Fist pull the code from your onboard computer with a OB2 scanner, that will give you the best clue, then clean and check your wheel sensors especially on the front axle. Then have the abs module checked. Most likely it is the wheel sensors, If you have a lot of brake wear they could be dirty or miss gapped, I would start there

Jan 10, 2015 | 2003 GMC Envoy

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Mercedes benz Actros 2007 OBDII

you need the right software and a multi use ob2 reader. pro scan 5.9 will read the system but you need the right ob2 tool for it to read. there is this site that may help you.

Feb 05, 2014 | Mercedes-Benz Mercedes Bentz Actros Semi...

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I have a problem with the code P0118 of my 2002 Jetta GL can you help me?

Make sure coolant level is as it should be. If level is low look for evidence of leak(s). Top off fluid if necessary. The engine coolant temperature sensor is a very common issue with these vehicles and may be the cause of your issues if no leaks are found. Also a faulty thermostat cans cause the sensors to read voltage high but most likely a sensor issue. The sensor is a potentiometer (variable resistor). The computer sends 5v through one of the wires this voltage goes through a resistor which will vary the voltage based on temperature sensed by the engine coolant temperature sensor. The sensor has a negative temparature coefficient meaning the resistance will go down when temperature is high and up when temperature is low. The less resistance the more of the 5 v gets back to the computer. The PCM detects this high voltage and set the check engine light on warning you of an issue. Whe this sensor goes bad it is usually accompanied by temperature gauge fluctuation or erratic operation and the cooling fans run long or all the time even though the vehicle is cold. Hope this helps.

Feb 14, 2013 | Cars & Trucks

1 Answer

No heat/no air blowing in 2000 Pontiac GTP 3.8L. Also coolant light and check engine light randomly come on and go off. We tried replacing the resistor which was a nightmare and didn't fix it. Then...

The blower no blowing, you replaced the resistor and the motor so the only thing left is a fuse or the switch,also the resistor is the main problem and is easy to replace are you sure you replaced the correct resistor and the connection to resistor was good and not melted, the resistor is located next to the blower in heaterbox if thats the one then you must have a bad fuse or switch, use a testlight and check for power at the motor,the low coolant is a problem with these the switch in the radiator goes bad and tells you coolant is low when in fact its not, the main problem is the coolant gets oily due to an intake leak, look inside the rad and the resivoir and if its oily then flush it out and have intake gaskey changed,this is the greasey stuff you are seeing,as far as the engine light you will need to have the computer scanned to get the codes, these codes will help in telling you why the light is coming on, there are many autopart stores that will scan it for free and if you rewrite me with the cars info and the codes i will help you further,also heres a picture of the resisitor just want to make sure its what you replaced because thatusally the problem, maybe the blower that was bad blew a fuse or the new resisitor went bad,hope this helps.johnjohn2_54.jpg

Jan 04, 2011 | 2000 Pontiac Grand Prix

2 Answers

Why is my check engine light coming on

You will have to have a scan tool,or code reader hooked up to the ob2 connector to read the codes to find out ,it will come on for dozens of reasons,and there are too many guesses,Auto zone will do this for free if there is one near you,if this was at all helpful,please rate thank you.

Aug 17, 2010 | 1997 Ford Windstar

1 Answer

Can the codes be pulled the same way as older toyotas or do i need an ob2

All cars sold after 1996 have to have obd-II capability. The old way of pulling up codes for obd-I are not applicable after that.

Aug 01, 2010 | Toyota 4Runner Cars & Trucks

2 Answers

Heater fan does not work and if I go to #4 on the swich it will blow the 30amp fuse in the fuse box.


Sounds like you have a short in the system. It sounds like the heater motor might have a short in it.. to check this you will have to take the heater motor out and test it with a battery and some wires.. if it turns the next place to look is the heater resistor. These are located under the hood on the passenger side of the vehicle. You will have to cut an access hole in the plastic cover to access the resistor. These are a pain to get to, and they are pretty common for going bad...

Good Luck,

Dec 21, 2009 | 1998 GMC Jimmy

1 Answer

Temp gauge shows hot even if engine has been off overnight?

Locate the temperature sending unit and pull the wire off of it. Turn the key to the on position (do not start) then have someone touch that wire to a ground source and the temp gauge should go from one extreme to another (cold to hot). If the gauge does that, you have a bad sending unit...if it does not move, you have a bad gauge or problem with the wiring to the gauge.

All the temp sending unit does is act like a variable resistor depending on the coolant temp...if it is bad, it will give you a false reading.

Mar 28, 2009 | 2003 Mitsubishi Galant

1 Answer

Hard start

DTC - 15 Engine coolant temp sensor error (low temp indicated)
This is an Diagnostic Trouble code using the OB1 which simply means the check engine light blinking in series at certain intervals.But my thinking says that if you are having trouble wuth any sensor , the ECU or PCU computer will read all kinds of things in error. Try replacing the TCS temperature control sensor.Only 96 and up have a OB2 Diagnostic system

Dec 28, 2008 | 1995 Honda Accord

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