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|