DDEC III/IV Single ECM Troubleshooting

Section 23.1 Description of Flash Code 23

Section 23.1
Description of Flash Code 23

Flash Code 23 indicates that the engine Fuel Temperature Sensor (FTS), see Figure "Fuel Temperature Sensor" , input to the ECM has exceeded 95% (normally >4.75 volts) of the sensor supply voltage.‪

Note: This code will only be logged during warm engine operation.

This diagnostic condition is typically:‪

  • Open sensor signal circuit
  • Open sensor circuit return
  • Sensor signal circuit is shorted to the sensor +5 volt supply


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

Leave a Reply

Your email address will not be published. Required fields are marked *