Car is still reading H and is giving me a overheating message

ESTHERA723

MEMBER
2013 FORD FUSION
4 CYL
TURBO
2WD
AUTOMATIC
96,000 MILES

I got in my car to head for work and a message came up saying “coolant low service soon”. I started it after work and the message did not pop up again so I assumed it was an error. That same night the gauge went to H, quickly, then went into “limp mode”. It has been sitting in my driveway for about a week now and even now the gauge automatically goes to H and the overheating message comes back on. The coolant was topped off, the fitting for the hose was replaced along with one of the sensors. What else could it be?

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Hi and thanks for using 2CarPros. Com.

There are actually two coolant temperature sensors on this vehicle. They are know to have trouble with the cylinder head temperature sensor. The other coolant sensor is for the car's computer.

You said a sensor was replaced, if it was not the cylinder head temperature sensor, that is my first suspect. Here are the directions for replacing it. All attached pictures correlate with these directions.

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Cylinder Head Temperature (CHT) Sensor

Removal

NOTE: Removal steps in this procedure may contain installation details.

1. WARNING: Before beginning any service procedure, refer to Safety Warnings in General Information. Failure to follow this instruction may result in serious personal injury. See: Vehicle > Initial Inspection and Diagnostic Overview

Refer to: Health and Safety Precautions See: Vehicle > Technician Safety Information > Health and Safety Precautions (General Information). See: Vehicle > Initial Inspection and Diagnostic Overview

2. Remove the air cleaner outlet pipe and the turbocharger inlet pipe.

3. See pic 1

4. Torque: 10 Nm

Installation

1.

- To install, reverse the removal procedure.

- Install a new CHT (cylinder head temperature) sensor.

2. See pic 3

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I hope this is helpful. Let me know if you have other questions or if this is the sensor that was replaced.

Take care,
Joe

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