P2181

P2181

Diagnosis information - Control unit DME (DFI)

Thermostat open blocked

Diagnostic conditions
- Driving > 10 Minute(s) , at:
- Engine start temperature -10° ... +60 °C (°F)
- Ambient temperature > -10 °C (°F)
- Vehicle speed average > 35 ... 60 km/h (depending on the outside temperature > +60°C ... less than +20 °C (> +140 °F ... less than +68 °F)
- Vehicle speed max. 100 km/h
- as few overrun phases as possible (< 100 Second(s) total)
- Mass air flow average > 25 ... 35 kg/h (depending on the outside temperature > +30°C ... less than -10 °C (> +86 °F ... < +14 °F)
- here Heating to > 80 °C (°F) Coolant temperature Engine

Possible fault causes
- Influence by engine-block heater
- Seal in the Thermostat housing Faulty
- Thermostat housing Faulty
- Thermostat Faulty
- Coolant temperature sensor Engine Faulty , or Loose contact or corrosion on connectors or lines

Fault setting condition(s)
- Coolant temperature Engine < Nominal value 80 °C (°F), at:
- Diagnosis end (See [Information])

INFORMATION
- Diagnostics has ended when the calculated temperature model has reached 80 °C (176 °F).
- Diagnostics is evaluated only if the aforementioned diagnostic conditions were met.