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Method and system for humidity sensor diagnostics

  • US 8,881,713 B2
  • Filed: 03/10/2011
  • Issued: 11/11/2014
  • Est. Priority Date: 03/10/2011
  • Status: Active Grant
First Claim
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1. A method of operating an engine including a humidity sensor, comprising,indicating humidity sensor degradation based on each of a change in an intake air relative humidity and temperature over a duration since an engine cold-start, the indication including indicating humidity sensor degradation responsive to a ratio of the change in humidity to the change in temperature, over the duration, being lower than a threshold.

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