Conditions Which Generate This Code:
The ECM detects the following conditions:
• The signal voltage from the coolant level sensor is greater than 4.5 VDC for more than ten seconds.
• The “Coolant Level Sensor” parameter is programmed to “2-wire Float Sensor”.
• The ECM has been powered for at least two seconds.
System Response:
The ECM will default to OK for coolant level. “DIAG” will be displayed next to the status for “Engine
Coolant Level” on the electronic service tool.
Possible Performance Effect:
None
Troubleshooting:
Perform the following diagnostic procedure:
“Coolant Level Sensor Circuit – Test”
Results:
• OK – STOP.
