P0117

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE. A/C not working. Radiator fan runs continuously when ignition is ON. Temperature gauge reading incorrect. Misfiring can occur before trouble code is generated.

P0117

Fault symptoms

•	CHECK ENGINE.

•	A/C not working.

•	Radiator fan runs continuously when ignition is ON.

•	Temperature gauge reading incorrect.

•	Misfiring can occur before trouble code is generated.

On-Board Diagnostics

Type of diagnosis:

-	Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria:

-	Engine running.

Fault criteria:

-	Voltage below 0.224 V for more than 1 s.

Dependents:

-

None.

System reaction to a fault :

-	A substitute value is continually calculated as follows: Switches to a limp-home temperature, which goes up to max. 106°C.

OK report:

-	P0116 Test 1 and Test 2 performed once and fault criteria not fulfilled. Fault criteria for P0117 or P0118 not fulfilled.

Fault handling: (See “Fault diagnosis, general” for more information.)

-

Type III.

Diagnostic help

Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.

Functions in the diagnostic tool related to the fault:

•	Diagnostic status for the diagnosis.

•	Temperature sensor reading, in °C.

See also description of read value under "Read Values" menu for more information.

Check the wiring

Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multimeter, test lamp or diagnostic tool while doing this.