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wtf does this engine code mean?? #113172 November 19, 2004 12:11 am UTC November 19, 2004 12:11 am UTC
Joined: Jan 2002 Posts: 1,754 London Shaun MacLary OP Serious Member
Shaun MacLary OP Serious Member Joined: Jan 2002 Posts: 1,754 London	My check engine light came on last night, got it scanned today. This is the code that came up. code P0125: Insufficient coolant tempurature for closed loop fuel control. What does that mean? Could it have anything to do with why I'm getting horrible horrible gas mileage?

Re: wtf does this engine code mean?? #113173 November 19, 2004 12:19 am UTC November 19, 2004 12:19 am UTC
Joined: Mar 2003 Posts: 5,126 Toronto Rob Cauduro Senior Member, with Far TOO Much Time on Their Hands
Rob Cauduro Senior Member, with Far TOO Much Time on Their Hands Joined: Mar 2003 Posts: 5,126 Toronto	Your coolant temp sensor in the thermo housing isnt working or you got a bad connection. This is indeed your reason for bad gas milage. The ecu basicly dumps fuel in the engine untill its up to operating temperature. There are two sensors on that housing if you have a 1g, one is for the temp gauge, the other is for the ecu. Its the ECU sensor you want to worry about. There is only one sensor on 2g cars. If your talking 2gnt, I have no idea where the sensor is.

Re: wtf does this engine code mean?? #113174 November 19, 2004 12:32 am UTC November 19, 2004 12:32 am UTC
Joined: Jan 2002 Posts: 1,754 London Shaun MacLary OP Serious Member
Shaun MacLary OP Serious Member Joined: Jan 2002 Posts: 1,754 London	Quote Originally posted by Rob Cauduro: Your coolant temp sensor in the thermo housing isnt working or you got a bad connection. This is indeed your reason for bad gas milage. The ecu basicly dumps fuel in the engine untill its up to operating temperature. There are two sensors on that housing if you have a 1g, one is for the temp gauge, the other is for the ecu. Its the ECU sensor you want to worry about. There is only one sensor on 2g cars. If your talking 2gnt, I have no idea where the sensor is. it's a 96 turbo

Re: wtf does this engine code mean?? #113175 November 19, 2004 12:37 am UTC November 19, 2004 12:37 am UTC
Joined: Jan 2002 Posts: 1,754 London Shaun MacLary OP Serious Member
Shaun MacLary OP Serious Member Joined: Jan 2002 Posts: 1,754 London	will this screw my engine over if not replaced right away? What's the best way to test this sensor?

Re: wtf does this engine code mean?? #113176 November 19, 2004 01:20 am UTC November 19, 2004 01:20 am UTC
Joined: Mar 2003 Posts: 5,126 Toronto Rob Cauduro Senior Member, with Far TOO Much Time on Their Hands
Rob Cauduro Senior Member, with Far TOO Much Time on Their Hands Joined: Mar 2003 Posts: 5,126 Toronto	you wont screw anything up, you will just be running rich all the time. http://www.ca.dsm.org/ubb/ultimatebb.php?ubb=get_topic;f=2;t=005635

Re: wtf does this engine code mean?? #113177 November 19, 2004 01:47 am UTC November 19, 2004 01:47 am UTC
Joined: Mar 2001 Posts: 2,787 Malaysia Jeremy Chin Member
Jeremy Chin Member Joined: Mar 2001 Posts: 2,787 Malaysia	Its an easy fix. There is no reason why you should be running like this. You might end up eventually killing your cat if it gets overheated with too much unburnt fuel. 300hp Talon to a 50hp Citroen. Lovely ain't it? Back to another Mits. A Mirage Cyborg as a future 4G63T candidate. "I've had more Mitsu's than you can imagine"

Re: wtf does this engine code mean?? #113178 November 19, 2004 01:34 pm UTC November 19, 2004 01:34 pm UTC
Joined: Jan 2002 Posts: 1,754 London Shaun MacLary OP Serious Member
Shaun MacLary OP Serious Member Joined: Jan 2002 Posts: 1,754 London	I'm gonna call around in a few minutes and see if I can find someone around here that has one in stock. Only reason i'm asking if it will screw my motor over is if I can't get one untill monday.

Re: wtf does this engine code mean?? #113179 November 19, 2004 06:31 pm UTC November 19, 2004 06:31 pm UTC
Joined: Jan 2004 Posts: 468 Ottawa @ the staging lights Trevor Yu Member
Trevor Yu Member Joined: Jan 2004 Posts: 468 Ottawa @ the staging lights	You might foul both your plugs and your O2 sensor with all that fuel going in. An O2 sensor costs about 130-150, plugs...depends what you get. If you do the work yourself you are ok, but I don't know how much a shop will charge to replace those. Make sure that you get someone to log your O2 voltages to make sure that it is operating properly (log before and after replacing that coolant temp sensor). Cheers Trevor FS: http://www.ca.dsm.org/ubb/ultimatebb.php?ubb=get_topic;f=8;t=002049 92AWD - JDM6-264 cams-14b-SAFC2-RC550-10ga W190-ACT2100-no BS-front AGX-K&N-boost gauge-front strut bar-EBC(F)PBR(R)

Re: wtf does this engine code mean?? #113180 November 19, 2004 08:53 pm UTC November 19, 2004 08:53 pm UTC
Joined: Jan 2002 Posts: 1,754 London Shaun MacLary OP Serious Member
Shaun MacLary OP Serious Member Joined: Jan 2002 Posts: 1,754 London	which coolant temp sensor is it that I need? there's two of them I believe. One with an oval connector on the end and two pins in it, the other has a little L shaped piece of metal on teh end that a one wire push terminal plugs onto. Which one is the one that controls the ECU?

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