Question about 1998 Toyota Camry

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The Toyota Camry engine light is on. Error Code P0125

The Code is P0125 - thermostat
The 1998 To is proforming well, but would like the engine light to be off.

Changed out the thermostat. Reset the code, but light came back on within three miles. No change in performance - operating very well.

I assumed the thermostat senor is bad. Replaced the 2-wire thermostat sensor. Results. No change. Engine light came back on.

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  • Anonymous Mar 12, 2014

    engine light comes on code idecates thermostat

  • Anonymous Mar 29, 2014

    thermostat also changed still code came within 3 miles drive how to fix it

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Change bank 1 sensor 1 this will solve your problem. Tihs is a fuel issue nit a thermostat issue.

Posted on Oct 15, 2009

Testimonial: "I did what you suggested and it worked. Thanks. "

  • tcrecampbell
    tcrecampbell Jul 21, 2012

    Did you just replace it with a regular O2 sensor or did it take a Air-Fuel Ratio (AFR) sensor? I have a similar problem with P0125 on 96 Camry (4 cyl). Changed ECT sensor, thermostat, cat, upstream O2. Still on.

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Change air flow meter

Posted on Jul 04, 2009

  • Philip Long
    Philip Long Jul 04, 2009

    change air flow meter

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Did you bleed out all the air in the coolant after replacing the thermostat does the temp gauge go to the middle and does it fluctuate while driving if not then replace the o2 sensor or air fuel sensor in the exhaust manifold

Posted on Jul 24, 2014

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1 Answer

Where is the ECT sensor located on my 1999 Toyota Camry XLE 6 Cylinder?


On the 1MZ alloy block V6 it is on top between the engine coolant filler cap (not the one on the radiator) and the dogbone engine steady bar.

If you want more info, post here an email where I can send it to you 50e82e93-93a5-4332-aa03-0149de5ebb67.jpg

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Error p0125


A code P0125 may mean that one or more of the following has happened: Insufficient warm up time Low engine coolant level Leaking or stuck open thermostat Faulty coolant temperature sensor Possible Solutions The simplest thing to do is to reset the code and see if it comes back. If the code comes back, the problem is likely going to be the result of the above causes (faulty thermostat, faulty ECT sensor, or a low coolant level

Apr 04, 2014 | 1998 Ford Explorer

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How do you fix a code#P0125 on a 1998 toyota 4 runner?insufficient coolent temp. for closed loop control?


first check radiator level if it is full and the heater is working good make sure temp gauge is functioning c orrectly it is most likely the coolant temp sensor but if this is a high milage vehicle and you have owned long time and never changed i would also replace thermostat and check plug to temp sensor forr good conections and good wires

Apr 01, 2012 | 1998 Toyota 4Runner

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My toyota engine light went on. The code reads P0125. I have changed 2 sensers already and light is still on.


That code in any toyota don't require sensor replacement, what it is is that the thermostat is not close complete or there is a small leak somewhere in your coolant system, the computer is spectating 180 or so from the moment that yo start the car to the moment that computer knows that that temp has to be reached if that don't happen because the car is loosing its temp due to a leak or a open thermostat , the computer sets p0125 unable to reach temp for close loop.

Dec 24, 2010 | Toyota ECHO Cars & Trucks

1 Answer

I have a 2000 Camry - 6 cylinder with about 180,000 miles on it. The Check engine light came on and it showed three codes - P0125, P1130 and P1135 - We put in a new thermostat - and still the check engine...


Was the computer reset after the thermostat was replaced?? If not, it must be reset to clear prior codes. as for the p1130/1135, they are related here is some info>>>>http://www.engine-light-help.com/toyota-engine-light.html

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Error P0125 and 1135 on obd2 reader


125 insufficient coolant temp for closed loop 1135 sensor heater circuit response bank 1 sensor 1--both can be caused by same problem code can go off for insufficient warm up -low coolant level-thermostat leaking/stuck open or faulty sensor reset code and see if problem returns code sometimes known to go off if vehicle didnt warm up before being turned off short distance drive

Oct 21, 2009 | 1999 Toyota Camry

1 Answer

1999 Camry 4 cyl. 104k miles, throwing codes p0125, p1130, p1135


P0125- Engine not reaching operation temp quick enough. Possible problems:
  • Insufficient warm up time
  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty coolant temp sensor
  • P1130- A/F Sensor Circuit Range/performance, Bank 1 Sensor 1

Oct 15, 2009 | 1999 Toyota Camry

1 Answer

Same error codes keep reappearing P0125, P1135,P0171and P1130


It seems this is a fuel problem from the description I get on my scanner for these codes. Is there any way I can get a more in depth explanation than just what shows on the scanner exp. (P0125 closed loop fuel insufficent coolant temp).Changing gas cap and plug wires solved nothing. P-0125 indicates that your thermostat is sticking open. The engine is not warming up enough to change from OPEN loop to CLOSED loop. P-0171 indicates that you have a dirty MASS AIR FLOW SENSOR. Replace the thermostat, and clean the MAF. Then clear the codes and drive it, and recheck for any codes.

Jun 08, 2009 | 1998 Toyota Camry

2 Answers

P0125 obd code


P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control
This means that the engine coolant temperature (ECT) sensor indicates that the engine
has not reached the required temperature level to enter closed-loop operation within a specified amount of time after starting the engine.

A code P0125 may mean that one or more of the following has happened:
  • Insufficient warm up time
  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty coolant temperature sensor

The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is likely going to be the result of the above causes (faulty thermostat, faulty coolant sensor, or a low coolant level).

Apr 22, 2009 | 1998 Ford Explorer

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Fix obd code p0125


A code P0125 may mean that one or more of the following has happened insufficient warm up time, low engine coolant level, leaking or stuck open thermostat,or faulty coolant temperature sensor The simplest thing to do is to reset the code and see if it comes back.If the code comes back, the problem is likely going to be the result of a faulty thermostat, faulty coolant sensor, or a low coolant level).

Apr 22, 2009 | 1998 Ford Explorer

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