Jaguar Workshop Service and Repair Manuals

Coolant Temperature Sensor/Switch (For Computer): Diagnostic Trouble Code Tests and Associated
Procedures

DTC P0116 - ECT Circuit Range/Performance Problem

DTC P0116 ECT Circuit Range/Performance Problem 

Possible Source(s): 
-

Thermostat

-

Coolant level/contamination

-

Sensor out of range

-

Harness open circuit

-

Connector loose or corroded

Action(s) to take: 
^

GO to Pinpoint Test A. See: Pinpoint Tests/Pinpoint Test A

DTC P0117 - ECT Circuit Low Input

DTC P0117 ECT Circuit Low Input 

Possible Source(s): 
-

Sensor open circuit

-

Harness open circuit

-

Harness short

-

Connector loose or corroded

Action(s) to take: 
^

GO to Pinpoint Test B. See: Pinpoint Tests/Pinpoint Test B

DTC P0118 - ECT Circuit High Input

DTC P0118 ECT Circuit High Input 

Possible Source(s): 
-

Sensor short

-

Harness open circuit

-

Harness short

-

Connector loose or corroded

Action(s) to take: 
^

Go to Pinpoint Test C. See: Pinpoint Tests/Pinpoint Test C

DTC P0125 - Insufficient Coolant Temp For Closed Loop Control

DTC P0125 Insufficient Coolant Temperature For Closed Loop Fuel Control 

Possible Source(s): 
-

Thermostat

-

Coolant level/contamination

-

Sensor out of range

-

Harness open circuit

-

Connector loose or corroded

Action(s) to take: 
^

GO to Pinpoint Test A. See: Pinpoint Tests/Pinpoint Test A