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My check engine light is on after running a diagnostic test , it said that the cooling systems thermostat is faulty but i have no symtoms of that the vehicle is running at a normal temp andnot overheating

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: engine cooling fan not coming on

It may be the fan itself. Try to find the plug going to the fan, it should be close to the fan and might plug diresctly into the relay. Use two jumper wires straight from the Bat one from the pos+ side and one from the neg- side and plug them into the two holes in the connector the fan should start WATCH YOUR FINGERS. If it starts its elec prob before the fan if not its the fan.

Posted on Jun 12, 2009

shadtremonky
  • 353 Answers

SOURCE: Check Engine light & TN Emissions

mas sensor is dirty

Posted on Jun 20, 2009

  • 66 Answers

SOURCE: OVERHEATING, CONSTANTLY FILLING RADIATOR WITH

remove the 3rd spark plug check for signs of coolant. if found you have bad head gasket

Posted on Jun 29, 2009

Gort007
  • 1187 Answers

SOURCE: engine light comes on and says engine overheating

Could be three things: Hopefully the first...
1. radiator fan not blowing. (most likely)
2. Radiator clogged (not likely)
3. Head gasket blown... (very possible)

If #1, system cannot detect fan not blowing. It may be the fuse or the relay switch, disconnecetd wire at fan, or burned-out fan motor.
If #2, Flush radiator
If #3, you will see WHITE smoke out the tailpipe and excessive water drops.
Your new oil will have a "milky" look (check the oil dipstick). That is water.
When engine is COLD, remove radiator cap and start car. You will notice high-pressure "bubbles" squirt out of the radiator, even before the engine warms up.

I hope it is #1. and that this is helpful.



Posted on Sep 08, 2009

  • 13 Answers

SOURCE: 2002 malibu runs hot.

Sounds like you have a faulty head gasket or maybe a cracked head.This can cause overheating and the check engine light to come on.The code for the o2 sensor is probably caused by coolant getting into the exhaust system and coating the sensor.The coolant fan may work but it cannot remove enough heat from the rad to make the engine cool off.Try some engine coolant stop leak to see if it will help.This maybe only a temperary fix.Let me know if you need more.MOE

Posted on Jun 22, 2010

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1 Answer

Symtoms of faulty thermostat water


Before answering that, the thermostat keeps the water in the engine until a specified temp inside the engine normaly around 190 degrees..then opens up to cool through the Collins system and allows hot water to the heater core inside the vehicle....Two major symptoms are engine over heating number one..Cold weather engine is hot but no or very little warmth of the radiator hoses with no heat to heater core inside the car..Not an exoensuve part or a hard job,,most are located at the bottom of the top hose where it connects to tne top of the engine..good luck

Mar 15, 2015 | Cars & Trucks

2 Answers

When my cooling fan comes on check engine light and temp. light starts flashing car idles really fastrun rough


it is overheating. low on coolant/ thermostat stuck shut? see if both radiator hoses are hot.

Oct 04, 2011 | 1989 Buick Century

2 Answers

I have a problem on my chevrolet the check engine light on and the code is p0010 p0128 and p0641 thank you.


Causes A code P0010 may mean that one or more of the following has happened:
  • Faulty oil control valve (OCV)
  • Open or short in the VVT/VCT circuit
  • Open or short in the OCV / solenoid valve
  • Damaged computer (PCM)
Possible Solutions Some recommended troubleshooting and repair steps are:
  • Carefully inspect the Bank 1 VVT/VCT system circuit wiring and connectors, repair as required
  • With a warm engine, test the operation of the OCV, replace/repair as needed

A code P0128 may mean that one or more of the following has happened:
  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty cooling fan (running too much)
  • Faulty coolant temperature sensor ECT
  • Faulty intake air temperature (IAT) sensor
Possible Solutions Past experience indicates that the most likely solution is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 OBD-II code:
  • Verify coolant strength & level
  • Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
  • Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
  • Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
  • If the above items check out good, replace the thermostat
P0641 is a generic code for a possible bad ECU. I would first fix the other two issues and then clear the check engine light and see if it comes back on. If it does, then you have a possible bad ECU and will need to run further tests to see if that is the case or not

Jun 30, 2011 | 2006 Chevrolet Cobalt

2 Answers

96 blazer 4.3 stalls when hot,changed coil and ignition module,and tps.it cools off then starts but stumbles lots,only when hot...cat problem?


The way to find out is to stop replacing parts and scan your engine control module for fault codes. If it is running as bad as you say it is, the check engine light has GOT to be YELLING at you! It could be anything from a bad distributor to a faulty fuel injector assembly to a fuel pump that works only when it wants to. Proper diagnostics can save you a BUNCH of money.

Jun 30, 2011 | Chevrolet Blazer Cars & Trucks

1 Answer

Replacing a thermostat


Buick Park Avenue Thermostat Repair Recommendations Best Practices
  • The entire cooling system should be inspected and tested when the thermostat is replaced.
  • A high-quality OEM thermostat should be used. Poor quality thermostats may not function properly and can cause damage to the engine or components of the emission system.
Common Symptoms
  • A thermostat that is stuck closed will cause the vehicle to overheat.
  • If the new thermostat does not immediately resolve engine temperature problems, the cooling system needs to be checked for other issues.
  • A thermostat that is stuck open can cause the engine to run colder than normal and set the Check Engine Light. It may also cause poor fuel mileage and the heater to blow cool air.
The thermostat will be at the end of one of your radiator hoses that goes into the engine block; normally at the top of the engine.

Feb 04, 2011 | 1995 Buick Park Avenue

1 Answer

Hi I own a 2003 Cadillac CTS I am getting a check engine light error light with code P0128 and my heat is fluxuating up and down I have already installed a themostat. What are my options


A code P0128 may mean that one or more of the following has happened:

1-Low engine coolant level
2-Leaking or stuck open thermostat
3-Faulty cooling fan (running too much)
4-Faulty coolant temperature (ECT) sensor
5-Faulty intake air temperature (IAT) sensor

Check coolant level
Check to make sure thermostat is functioning properly Check the Cooling fan Check the ECT sensor Check the IAT sensor If all else fails replace the thermostat

Jan 05, 2011 | 2003 Cadillac CTS

1 Answer

Check engine light comes on. diagnostic test


Never heard of a thermostat sensor. There is a diagnostic code that wil lbe set if the engine computer observes that the thermostat is not allowing the engine to reach operating temperature quickly enough. This code is based on information sent by the engine coolant temperature sensor. 99.9% of the time a new thermostat solves the problem. Use an AC Delco thermostat.

Dec 30, 2009 | 2003 Chevrolet TrailBlazer

2 Answers

What does code: PO128 mean? I plugged it into the diagnostic machine, and that's the code that popped up.


A code P0128 may mean that one or more of the following has happened:
  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty cooling fan (running too much)
  • Faulty coolant temperature (ECT) sensor
  • Faulty intake air temperature (IAT) sensor
The most common cause is a faulty thermostat. However here are some suggestions on troubleshooting and repairing:
  • Verify coolant strength & level
  • Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
  • Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
  • Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
  • If the above items check out good, replace the thermostat

Nov 20, 2009 | 2007 Chevrolet Silverado 2500HD

1 Answer

Check engine light is on, the car seems to be running fine. The last time it was asensor that just had to be reset by the dealer. There are no other symtoms to report


have to rescan the pcm for codes----i have ran into a few on the beetle including evap leak , and also ran into code indicating engine too cool(thermostat) ---have it scanned 4 a code, ill be able to assist you further---scott

Aug 06, 2009 | 2001 Volkswagen Beetle

1 Answer

2002 CRV D Light started flashing and engine light on.


sounds like your transmission control module is faulty go to your local dealership and let them test it

Mar 14, 2009 | 2002 Honda CR-V

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