Question about 1996 Chevrolet Cavalier

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I just recently changed my thermostat on my 96' Cavalier. I replaced the fan sensor and the bulb that reads the temperature. After I did all this water keeps coming out, the problem is, I don't know from where?I would really appreciate your help.

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Bring it to me and I will look at it and tell you. Kind of hard to diagnose a coolant leak without looking. Hose or gasket? 29205

Posted on Dec 29, 2010

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Posted on Jan 02, 2017

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2 Answers

1994 Chevy Cavalier fan won't come on


Sounds like the sensor is not reading the coolant temp, or the computer is not accepting the data from the sensor.
Its possible you have air in the cooling system, or you have a problem with the computer.

Aug 28, 2012 | 1994 Chevrolet Cavalier

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CEL on with PO128 code. Recently replaced radiator and thermostat. No engine cooling issues, had a leaking rad. Checked coolant flow; hot and cold, normal. Was going to replace ECT sensor, but want to...


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 ECT Sensor
  • 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

Jun 11, 2011 | Dodge Caravan Cars & Trucks

1 Answer

What controls the fan relay to get the ground so the fan will come on?


Your engine temperature sensor. That and the ECM. If you tested your relay and it is good then it is not getting the signal to close the circuit when the engine heats up. Your coolant is controlled by a manual thermostat but your fan knows to turn on based on the engine temp readings through your engine temp sensor. It is cheap and easy to replace but I would double check your fuses first.

Mar 23, 2011 | 2001 Chevrolet Cavalier

2 Answers

2003 chevy cavalier with no heat and temperature doesn't rise past 40 degrees engine code P0128 comes up when checked and the thermostat and radiator have been replaced still isn't fixed what do i do?


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
Possible Solutions

Feb 27, 2011 | 2003 Chevrolet Cavalier

1 Answer

I have a 1994 chevy cavalier 2.2L engine. the engine fan does not turn on causing the car to over heat. What makes the fan turn on, is it a thermostat or a fuse?


REPLACE THERMOSTAT BUT IT SOUND LIKE FAULTY COOLANT TEMPERATURE SENSOR.BUT CHECK COOLING FAN FUSE AND RELAY.IF ALL IS GOOD HOT WIRE COOLING FAN IF COOLING FAN WORKS.PROBLEM COULD BE FAULTY COOLANT TEMPERATURE SENSOR. DAMAGE FAN WIRING OR FAULTY PCM.IF COOLING FAN DONT RUN WHEN HOT WIRED.REPLACE FAN AND MOTOR.

Feb 20, 2011 | 1994 Chevrolet Cavalier

2 Answers

P0128 coolant temp below thermostat/regulating temp


P0128 - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat. Similar codes: P0125

In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant temperature (ECT) sensor reading, and the speed of the vehicle.

Symptoms: You will likely not notice any drivability problems other than the MIL illumination.

Causes: 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

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
* If Nissan vehicle, check for Technical Service Bulletins (TSBs), as the ECM may need to be reprogrammed to correct the P0128 code

Hope helps (remember to rate and comment this).

Sep 27, 2010 | 2006 Dodge Caravan

1 Answer

1996 Chevrolet Cavalier sending unit was changed


eng.temp.coolant sensor,located on thermostat housing,if u think sensor is defect,this check will make engine light come on,unplug elect. connection on sensor while car is idling,cooling fan will start up within 1 min.if it doesnt check fans power circuit.or apply batt.voltage directly to fan to see if fan will work.

Apr 26, 2009 | 1996 Chevrolet Cavalier

1 Answer

Coolant temperature relay switch


Most vehicles use a coolant temperature sensor which is located near the thermostat directly connected into the coolant line, or near the thermostat housing, there are relays for the cooling fan which is usually located in the power distribution box under the hood.

Mar 16, 2009 | 1998 Chevrolet Cavalier

1 Answer

1994 CHEVY CAVALIER V-6 STARTS TO OVERHEAT WHEN A/C RUNNING. ALREADY CHANGED THERMOSTAT AND ADDED COOLANT, STILL RUNS HOT, SOUNDS LIKE THE COOLING FANS AREN'T COMING ON WHEN THEY ARE SUPPOSE TO. CONSTANT...


Make sure you get the air out. There may be "high spots" on the engine that you can unscrew to let the air pockets t. Close this small valve when just hot water comes out.
Unplug the radiator fan and use jumper leads to test the fan operation. Use a scan tool to check for codes. If you get a scan tool that gives live data, see that the PCM sees the actual temperature of the engine after 5 to 10 minutes of running. It should see the temp. rising to 225 degrees farenheit.
Replace engine temperature sensor if the PCM doesn't recognize the proper temperature. You ARE going to compare this to the temperature gauge!!!
If all else fails, get the PCM recalibrated or flashed at the dealership.

Jul 16, 2008 | 1999 Chevrolet Cavalier

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