Check engine code 1289

Good afternoon,

The temperature sensor is at the back of the motor on the passenger side. It is a lot of work to get to it.

What is the code that makes you think it needs to be replaced?

https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works

Roy

Okay, the easiest way to check this is to remove the connector and test the voltage at the sensor itself.

Put the red lead in one terminal and the black lead in the other. You should have 5 volts.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Roy

DL: Cylinder Head Temperature (CHT) Sensor

DL: Introduction See: Computers and Control Systems > Diagnostic Trouble Code Tests and Associated Procedures > DL: Cylinder Head Temperature (CHT) Sensor - Introduction

DL1 CHECK FOR DTCS

Are DTCs P0116, P0119, P0125, P0128, P017C, P017D, P017E, P101F, P1021, P1022, P1023, P1024, P1025, P1026, P1285, P1288, P1289, P128A, or P1290 present?
Yes

GO to DL2

No

For temperature warning indicator lamp or gauge (applications with CHT sensor only) symptom, GO to DL12
.

For all others, RETURN to Section 3 See: Computers and Control Systems > Diagnostic Trouble Code Tests and Associated Procedures > SECTION 3: Symptom Charts
Symptom Charts for further direction.

DL2 CHECK THE COOLING SYSTEM

Warning: to avoid personal injury do not unscrew the coolant pressure relief cap while the engine is operating or hot. The cooling system is under pressure. Steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in personal injury
.
Note:DTC P0125 or P0128 indicates the engine coolant temperature has not achieved the required engine operation temperature level, since start-up within a specified amount of time.

Check the cooling system for:
correct coolant level
internal or external coolant leaks
blockage of the radiator
cooling fan operation
Is the cooling system OK?
Yes

For DTCs P0125 or P0128, GO to DL11
.

For all others, GO to DL3
.

No

REFER to the Workshop Manual Section 303-03, Engine Cooling to diagnose a cooling system concern.

REPAIR as necessary.

CLEAR the DTCs. REPEAT the self-test.

DL3 CHECK THE RESISTANCE OF THE CHT SENSOR WITH THE ENGINE OFF

Note:Refer to the chart at the beginning of this test for the resistance specifications.

Ignition OFF.

For the CHT2 sensor,

CHT2 Sensor connector disconnected.

Measure the resistance between:

image

For all others,

CHT Sensor connector disconnected.

Measure the resistance between:

image

Is the resistance within specification?
Yes

GO to DL4
.

No

INSTALL a new CHT sensor.