Why does my pressure gauge go into the Red / high pressure?
Why does my pressure gauge go into the Red / high pressure? The most common reasons for the pressure gauge to indicate a red/high pressure reading are the car is not running, or the A/C is not on with the fan switch set to high and the temperature at its coldest setting. Why does my oil gauge read too high? Oil Pressure Gauge Reading Too High. Another common oil pressure gauge problem is a reading that’s too high when your engine is idle or when it's turned off. The gauge should never read very high when you’re not driving because...