Q: My 2003 honda civic EX 1.7L is overheating. I replace the thermostat, replace the cooling fan temperature switch, remove the radia

asked by on

Own a 2003 honda civic EX 1.7L. My car is overheating. I replace the thermostat, the cooling fan temperature switch, took the radiator to get it checked (they clean it up and there were no leaks on it). My car still overheating. the only time I drove it in the freeway with the car on the process of overheating, the temperature went down i don't know why, then when I got off the freeway the was overheating again. Is there another sensor I should replace? Or my next step would be the water pump?...... also my fans won't work UNLESS I turn on the a/c and i even with the fans on it would still overheat. I'll be waiting for an answer. Thank you.

My car has 195500 miles.
My car has an automatic transmission.

It is likely your engine has a blown head-gasket, worn out water pump or somehow has a huge air bubble inside the engine that needs to be bled. The drop in engine temperature while on the freeway is actually a good sign - it indicates your radiator is getting good coolant flow, and the radiator is doing its job, transferring heat out of the engines cooling system. A YourMechanic certified technician can come to your location to perform a Car is overheating Inspection on your vehicle and help you diagnose and repair this issue.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My 2003 honda civic EX 1.7L is overheating. I replace the thermostat, replace the cooling fan temperature switch, remove the radia

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Removal of rear seat

Hi there. This video shows how the process is completed on the 9th Gen Honda Accord. The process for your 2003 is nearly identical.

Q: Oil light and battery light on.

Hi There, The oil pressure light will usually come on when a few things could be happening. Either the motor is in fact low on oil, the oil pump could be failing or the oil pressure sending unit is not...

Q: Engine and electrical system pulsating

Hello, Quite often, electrical system surges are caused by damage to relay components. If the fuel pump or ignition system relay is damaged, it may cause the engine RPM to rise and fall or cause the pulsating symptoms you're experiencing....

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...