98-2 157 0
UnclassifiedCooling
What This Code Means
Defect recognized in air temperature sensor upstream engine Inlet Valve; Coolant temperature voltage below low source; Coolant temperature voltage shorted to low source; High engine temperature pre-warning; High engine temperature warning; Software reset; Failure only visible for manufacturer specific testers; Desired fuel quantity to reach requested rail pressure is higher than expected at idle speed; Incorrect measuring of the rail pressure; Measured pressure rises considerably for a brief time (jumps > 500,00bar in a 10 ms window)
Possible Causes
- •Faulty electrical signal of the air temperature sensor upstream engine Inlet Valve
- •Coolant temperature sensor electrical signal range check failure
- •Engine temperature > 101,96°C
- •Engine temperature > 105,96°C
- •Internal software failure
- •Leaky system
- •Loose contact in the rail pressure sensor wiring
Suggested Actions
- 1A substitute value is taken
- 2Perform gradient monitoring of the rail pressure
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