This fault typically arises from operating under extreme load and high ambient temperatures
and/or high altitude operation.

128.2.1 Temperature Warning Check128.1.1.1.
Check as follows:
1. Check for multiple codes:
[a] If SPN 110/FMI 0 is also present, repair the cooling system first. Refer to section
[b] If only SPN 4228/FMI 15 is present, go to step 2.
2. Visually inspect the turbo for signs of exhaust leak in the area of the actuator.
[a] If exhaust leaks are present, repair as necessary. Refer to section
[b] If no exhaust leaks are present, go to step 3.
3. Remove and inspect turbo and actuator cooler lines and fittings.
[a] If coolant lines or fittings are kinked or plugged, repair/replace the damaged
component. Refer to section
[b] If coolant lines are not damaged and problem still persists, contact the Detroit Diesel
Customer Support Center at 313–592–5800. Verify Repairs
Verify repairs as follows:
1. Turn ignition OFF.
2. Reconnect any electrical connections that were disconnected to perform the diagnosis.
3. Clear codes with DDDL 7.0 or latest version.
4. Start and bring engine up to operating temperature (over 140°F/60°C).
5. Verify operation is satisfactory and no warning lamps illuminate. If warning lamps
illuminate, troubleshoot the codes. If assistance is required, call the Detroit Diesel
Customer Support Center at 313–592–5800.

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