P026A

The efficiency of the charge air cooler is not sufficient.
The efficiency of the charge air cooler is not sufficient.


The efficiency of the charge air cooler is not sufficient.
Legend
The illustration shows a schematic of the coolant circuit of combustion engine 'M278' by way of example.

- 1 Radiator
- 2 Low-temperature cooler
- 3 Coolant pump
- 4 Expansion reservoir
- 5 Right cylinder bank
- 6 Left cylinder bank
- 7 Charge air cooler
- 8 Turbocharger Right
- 9 Turbocharger Left
- B11/4 (Coolant temperature sensor)
- M4/7 (Combustion engine and air conditioning with integrated control fan motor)
- M44 (charge air cooler circulation pump)
- R48 (Coolant thermostat heating element)
- S41 (Coolant level switch)
- Y16/2 (Heating system shutoff valve)

Possible causes and remedies

- Check coolant level.
- Check low-temperature cooler for soiling.
- Check delivery rate of component 'M44 (charge air cooler circulation pump)'.
- The low-temperature cooler or charge air cooler is corroded or clogged by incorrect coolant.

End of test







End of test
Result: Fail