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Pressure sensor diagnosis via a computer

  • US 6,947,831 B2
  • Filed: 04/11/2003
  • Issued: 09/20/2005
  • Est. Priority Date: 04/11/2003
  • Status: Active Grant
First Claim
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1. A system for a vehicle having an engine with an exhaust system, the system comprising:

  • a pressure sensor coupled in the engine exhaust;

    a particulate filter coupled in the engine exhaust; and

    a computer storage medium having a computer program encoded therein for determining degradation of said exhaust pressure sensor, comprising;

    code for determining at least a parameter based on at least two flow conditions;

    code for measuring a signal from the exhaust pressure sensor; and

    code for determining degradation of the exhaust pressure sensor based at least on said parameter and said signal.

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