Cruze

DTC P0117, P0118, or P0119

The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module (ECM) supplies 5 V to the ECT 1 sensor signal circuit and a ground for the low reference circuit.

P0117 00 and P0118 00

P0119 00

P0117 00

The ECM detects that the ECT sensor 1 signal is less than 0.27 V, which is warmer than 137°C (279°F) for greater than 2 s.

P0118 00

The ECM detects that the ECT sensor 1 signal is greater than 4.96 V, which is colder than -39°C (-38°F) for greater than 2 s.

P0119 00

The ECM detects that the ECT sensor 1 signal has abruptly changed by a minimum of 5°C (9°F), warmer or colder for greater than 2 s.

DTCs P0117 00, P0118 00 and P0119 00 are Type B DTCs

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Cooling System Description and Operation : 2.0L Diesel LNP → 1.4L LDD and LUJ → 2.0L Diesel LLW

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. If the ignition has been OFF for 8 h or greater, the IAT, the ambient air temperature, and the ECT should be within 9°C (16°F) of each other. Ignition ON, observe the scan tool IAT Sensor, Ambient Air Temperature, and the ECT Sensor 1 parameters. Compare those sensor parameters to each other to determine if the condition is current.
2. Engine running, observe the scan tool ECT Sensor 1 parameter. The reading should be between -39 to +139°C (-38 to +282°F) depending on the current Ambient Air Temperature, the engine run time, and the vehicle operating conditions.
3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

1. Ignition OFF, disconnect the harness connector at the B34A Evaporator Temperature Sensor 1.
2. Ignition OFF, test for less than 5 Ω between the low reference circuit terminal 2 and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

3. Ignition ON, verify the scan tool IAT Sensor 1 is warmer than -40°C (-36.4°F).

⇒	If less than the specified range, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.

4. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool ECT Sensor 1 is colder than 140°C (284°F).

⇒	If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

5. If all circuits test normal, test or replace the B34A Engine Coolant Temperature Sensor 1.

Static Test

Measure and record the resistance of the B34A Engine Coolant Temperature Sensor 1 at various ambient air temperatures, then compare those measurements to the link table.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.