2001 Saab 9-5 Owner's Manual - Page 56

56 NOTE Instruments and controls Under certain barometric conditions the needle may enter the first part of the red zone without necessarily indicating that a fault has arisen. If the needle repeatedly enters the red zone and the engine at the same time loses power, because the monitoring system is holding the charging pressure down, you should contact an authorized Saab dealer. If the speed exceeds 143 mph (230 km/h), the increase in speed will be limited by the lowering of the boost pressure. The pressure gauge then moves towards the middle of the orange zone, indicating reduced engine output and thus reduces the speed of the car as well. If the needle, despite the above action, enters the red zone, stop the car immediately, let the engine idle. If the needle stays in the red zone, stop the engine. Check fuse 15 (radiator fan) in the fuse panel under the hood, see page 219. If the needle repeatedly enters the red zone, stop the car as soon as it is safe to do so and check the coolant level by looking at the level visible through the plastic tank - do not remove the cap. If the coolant level falls below the MIN mark, the SID will display the message "FILL COOLANT FLUID". Pressure gauge The turbo gauge indicates the air volume for combustion, which is equivalent to the engine load. At low loads, the needle will move within the white zone. At higher loads and during heavy acceleration, the needle will enter the yellow area. At very high loads (certain variants only) the needle may enter the first part of the red zone without indicating that there is a fault. WARNING Never open the cap of the expansion tank completely when the engine is hot, open with care. The pressure in the cooling-system can cause hot coolant and steam to be released. IB344