Section 28.1 Description of Flash Code 28

Section 28.1
Description of Flash Code 28

Flash Code 28 indicates that the engine Air Temperature Sensor (ATS), see Figure "Air Temperature Sensor" , input to the ECM has dropped below 5% (normally < 0.25 volts) of the sensor supply voltage. ‪

This diagnostic condition is typically:‪

  • Sensor signal circuit is shorted to sensor return
  • Sensor signal circuit is shorted to ground


DDEC III/IV Single ECM Troubleshooting Guide - 6SE497
Generated on 10-13-2008

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