METHOD AND APPARATUS FOR DIAGNOSING A FUEL PRESSURE SENSOR

摘要

A device executes a power limiting process when the number of pressure sensors determined to be normal in a second determination process made by a second processing unit is smaller than or equal to one. When only one pressure sensor (51 [#1] or 51 [#4]) is determined to be normal through the second determination process, and when that pressure sensor and a pressure sensor (51 [#2] or 51 [#3]) connected to only a first processing unit are determined to be normal in a first determination process made by the first processing unit, a process associated with fuel injection based on a detected value of the pressure sensor determined to be normal in the second determination process is executed, and a degree of limiting engine power through the power limiting process is reduced as compared with when both the pressure sensors (51 [#2] and 51 [#3]) are determined to be abnormal in the first determination process.