Robert Boschgmbh

Steffen Ziel

Christof Thiel

Andreas Bethmann

In a method for error diagnosis of an ambient-pressure sensor and an intake-manifold pressure sensor of an internal combustion engine, a defective intake-manifold pressure sensor or a defective ambient-pressure sensor is unambiguously detected by measuring the signals of the ambient-pressure sensor and the intake-manifold pressure sensor with the internal combustion engine stopped, and comparing the ambient pressure represented by the sensor signal of the ambient-pressure sensor to the intake-manifold pressure represented by the sensor signal of the intake-manifold pressure sensor to determine a pressure difference. If the determined pressure difference is greater than a predetermined maximum value, at least one additional sensor signal is measured with the internal combustion engine running, which additional sensor signal is used for identifying the defective sensor.

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Schwieberdingen, Germany

Steffen Ziel