P0115

Symptom: CHECK ENGINE. A/C malfunctioning. Radiator fan running continuously when ignition is ON. Temperature gauge displaying incorrect value. Possibly starting difficulties or misfiring before DTC generated.

P0115

Fault symptoms

•	CHECK ENGINE.

•	A/C malfunctioning.

•	Radiator fan running continuously when ignition is ON.

•	Temperature gauge displaying incorrect value.

•	Possibly starting difficulties or misfiring before DTC generated.

On-Board Diagnostics

Type of diagnosis:

-	Once per driving cycle. Interrupted when fault criteria fulfilled or OK reported. Restarts next driving cycle.

Enable criteria:

-	General conditions for this diagnostic trouble code: Atmospheric pressure must exceed 72 kPa as well as coolant and intake air temperature exceed -7°C.

-	Crankshaft rotated more than 4000 engine revolutions since start.

Fault criteria:

-	Engine coolant temperature has changed less than 1°C since start.

Dependents:

-

None.

System reaction to a fault :

-	A substitute value is calculated continuously as follows: Starting intake air temperature is incremented with 1°C per 60 g air mass/s. The value is maximized to 90°C and is used as soon as fault criteria for the sensor are fulfilled.

OK report:

-	Enable criteria fulfilled without fault reports.

Fault handling: For more information, see Fault handling III, other emission-related components and functions .)

-

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 value, unit °C.

For more information, see Menu "Read Values" .

Checking the wiring

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.