Question about 1995 Volvo 850

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ETC CODE AND HAVE REPLACED COOLANT TEMP SENSOR

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Very common for the thermostat to not allow the engine to get to the required temp and it will set the code. Replace the t/stat with an OEM thermostat

Posted on Apr 15, 2015

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Posted on Jan 02, 2017

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saailer
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SOURCE: volvo 850 fan stays on

Hello! Even though you have replaced the Throttle Positioning Sensor (TPS) This does not insure that Input and Output reach their proper destination...If you have a volt meter here is a test procedure to eliminate the TPS from the equation...

The wire colors and signal names for the TPS are...Orange/White...Sensor output...Yellow...5volt reference...And Brown/Black return...Using two safety pins...Push the point into the rear of the in-place connector on the Brown/Black...The other on the Yellow...Set the meter to read +5 volts...Hook the + probe to Yellow...And - probe to Brown/Black...Turn the key to ON...Must read +5 volts...Move the Yellow pin to the Orange/White wire...Must read less than 1 volt (.85)...Send a comment and I'll take it from there...Often times people become convinced that there can only be one thing wrong...Double faults are rather common................Guru...........Saailer

Posted on Jan 17, 2011

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I have a 2006 Toyota Tacoma when an era code P2198 I replace the oxygen sensor


This code means the fuel mix is too rich, and your O2 sensor is telling the ECU this is so. Look for other reason mix is rich, such as bad tune up parts, ignition module, coil, coolant temp sensor, etc.

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Trouble codes p0118 temperature po118


code p0118 refers to engine coolant temperature (ETC) sensor ---circuit malfunction===causes---coolant thermostat---wiring open circuit/short to positive---wiring short to ground---ground wire defective---ECT sensor.. The temp gauge works off a temperature sender unit separate to the coolant sensor and if it is reading 100 then it indicates an overheat situation in the engine . Probably why the engine light is coming on. As the thermostat is in the list of causes I would replace it as a precaution. The coolant sensor is what tells the CPU to turn on the electric fans to cool the radiator

Jan 13, 2014 | 2004 GMC Envoy

1 Answer

Primary cooling fan only comes on when i turn ac on


You would need a scanner and an inferred temp sensor to troubleshoot the system.
You need to know what the actual engine temp is, and what the temp sensor is telling the computer.
If and when the engine reaches 220 degrees, the engine temp sensor should be sending that data to the computer and it should ground the fan relay to activate it.
Unplugging the sensor and having the fan run tells you the sensor is connected, and there should have been a trouble code set at that time.
It is possible the coolant level is low, or something else preventing the temp sensor sending the correct data.

Apr 16, 2013 | 2002 Chevrolet Malibu

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How do i fix code 51 89 ranger 2.3 std trans


That code is for the coolant temp open circuit. More than likely replacing the coolant temp sensor will correc the issue but check/verify the connector and wiring for the temp sensor before you replace.

Feb 24, 2011 | 1989 Ford Ranger

2 Answers

1996 corvette didn't pass emissions codes po117 and po300 i just put new engine n tune up what could be wrong now


p0300 is usually a random cylinder miss-fire code, and i think that p0117 is coolant temperature sensor? Try replacing the sensor, could also be the reason for the other code, as a malfunctioning coolant temp sensor will affect engine timing.

Dec 14, 2010 | Chevrolet Corvette Cars & Trucks

1 Answer

Getting codes PO431, PO421, PO128


2003 saturn vue, we dont have the engine size, the codes should be and are the same, po 128 means; cooling temp is out of spec, make sure the coolant is full, then replace the coolant emp sensor and make sure the connection is good, i would also replace the thermostant, this is a common code on these and most of the time its the coolant temp sensor or thermostant, ive learned to replace then both to avoid future engine lights with code po128. next we will check the code # po421, this code is that the computer sees that the cat converters are taking to long to warm up, code po 431 is also the same as po421, this code is related to the thermostant and sensor, the sensor give the computer the wrong temp readings and then the compuetr thinks the engine is hotter than it is and thinks the converters should be also hot like the motor but the coolant temp is giving a false reading, if you replace the coolant temp sensor and the thermostant and fill coolant , then reset the light and you will solve the problem, i hope this is helpful, also the sensor is located to the right of the engine if you are standing in front of the motor, heres a picture of the sensor, remember to check connector heres a pic of the connector, good luck.johnjohn2_20.jpg

Nov 10, 2010 | 2003 Saturn VUE

1 Answer

How repair replace part for code p183,p420,p430,p462


PO183--Engine Fuel Temp Sensor,Verify PID Value
PO420---Catalyst System Efficiency Below Threshold (Bank1),O2 Sensors,Coolant Temp Sensor,Misfiring,etc
PO430--- Catalyst (Bank2)
PO462---Fuel Level Sensor Circuit Low Input,pump module,etc

Well----Codes do not tell you what part to replace,Just that a possible system failure has ocurred
Unless you have a scanner,not a code reader and a trouble chart,your done.
No experience,done

I would speculate, that you only have a couple of, not too serious issues,but wouldn't guess,it doesn't work that way.
Always test,and only replace things if they fail a test.

Is the battery okey and alternator output good ?

Oct 21, 2010 | 2004 Nissan Titan

1 Answer

Coolant temp below thermostat regulating temp


more than likely the thermostat has stuck open. Or opening to soon not allowing the car to reach normal operating temperature. I would start by replacing the thermostat. Clearing the code and running a drive cycle and see if the code comes back. if the code does not return problem solved. if it does return replace the coolant temp sensor.

Oct 17, 2009 | 2005 Pontiac Grand Prix

1 Answer

Getting a low coolant temp code.temp is normal. im


Sometimes there are two Temp sensors. Did you see if you had two?

Jul 29, 2009 | 1997 Toyota Tacoma

1 Answer

2001 Jeep Grand Cherokee Engine temg gauge not working


If you changed the coolant temperature sensor and it had a 5 volt ref signal to it then you replaced the wrong part. You need to replace the coolant temperature sending unit.  The coolant temp "sensor" is an input to the ECM for your fuel injection system. The coolant temp "sending unit" is for coolant temp reading at the gauge, It is an NTC switch (negative temperature coefficient) which means as temp increases/resistance decreases. 

Dec 19, 2008 | 2001 Jeep Grand Cherokee

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