Description of Flash Code 28
The SAE J1587 equivalent code for Flash Code 28 is p 172 4, air temperature circuit low.
Flash Code 28 indicates that the engine Air Temperature Sensor (ATS)/Intake Air Temperature Sensor (IAT Sensor), see Figure "Intake Air Temperature Sensor" , input to the ECM/ECU has dropped below 5% (normally < 0.25 volts) of the sensor supply voltage.
|Series 60 DDEC V Troubleshooting Guide - 6SE570|
|Generated on 10-13-2008|