Diagnostic Aids

With ignition on and engine not running, boost pressure is equal to atmospheric pressure with signal voltage being high. Comparison of this reading with a known good vehicle using the same type sensor is a good way to check accuracy of a suspect sensor. Readings should be the same plus or minus .4 volt. Very little boost can be attained by revving the engine in Neutral.

Fig 1: DTC 62 Schematic ("P" Series) Turbo Boost Sensor Circuit Low

Fig 2: DTC 62 Flow Chart ("P" Series) Turbo Boost Sensor Circuit Low