Possible Causes
- Good Trip Equal To Zero
- (K-25) AAT Signal Circuit Shorted To Battery Voltage
- Ambient Temperature Sensor Voltage Below 1.0 Volt
- (K25) AAT Signal Circuit Open
- (K4) Sensor Ground Circuit Open
- (K25) AAT Signal Circuit Shorted To Ground
- (K25) AAT Signal Circuit Shorted To (K4) Sensor Ground
- PCM Low
- PCM High