1, 2 and 3 Digit Codes: 30

Scan Tool 30 (MIL 22):

Trouble Code Number
- Scan tool 30
- General Scan Tool P0117
- MIL 22

Fault Message
- Engine Coolant Temperature Sensor Voltage Too Low

Background
- Data from the engine coolant temperature sensor is used in most fuel and spark related control functions.

Range of Check
- Ignition switch: ON

Set Condition
- Engine coolant temperature sensor output voltage remains less than 0.51 V for 3 seconds.

Probable Cause
- Sensor signal shorted to ground
- Sensor internally shorted
- PCM failed