Description of Flash Code 27
Flash Code 27 indicates that the engine Air Temperature Sensor (ATS), see Figure "Air 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 return circuit
|DDEC III/IV Single ECM Troubleshooting Guide - 6SE497|
|Generated on 10-13-2008|