C15 – 0111-03 Coolant Level voltage high (12)

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:


Perform the following diagnostic procedure:
“Coolant Level Sensor Circuit – Test”

• OK – STOP.

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