0203023 JOHNSON SCREW, Carburetor mounting

Table 1
Diagnostic Trouble Codes for Fuel Temperature Is High
J1939 Code Code Description Comments
174-16 Engine Fuel Temperature 1 : High - moderate severity (2) The temperature of the low-pressure fuel in the high-pressure fuel pump is high.
The ECM has been powered for at least 2 seconds.
The engine has been operating for at least 185 seconds.
There are no other faults in the electrical system.
The warning lamp will come on.
The engine may be derated.
The warning lamp will go off when the temperature drops below the reset point. The code will become logged. Probable causes
Diagnostic codes
Incorrect position of fuel shut-off valves
Fuel level in tank
Return fuel cooler (if equipped)
Location of the fuel tank and fuel linesNote: The procedures have been listed in order of probability. Complete the procedure in the order in which the steps are listed.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Diagnostic Codes Active or Logged Diagnostic codes.
A. Establish communication between the electronic service tool and the Electronic Control Module (ECM). Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the Product Status Report before troubleshooting or clearing any diagnostic codes.
Note: The downloaded information will be required by the DSN if troubleshooting assistance is needed.
C. Use the electronic service tool to check for active or logged codes.
Diagnostic Active or Logged codes
Result: A diagnostic code is active or logged other than a 174-16 code.
Repair: Troubleshoot the active or logged code.
Result: A 174-16 diagnostic code is active or logged.
Proceed to Test Step 2.
2. Fuel Shut-off Valves
A. Check the position of any fuel shut-off valves in the feed lines between the fuel tank and the engine.
B. Check the position of any fuel shut-off valves in the return lines between the engine and the fuel tank.
Fuel valves
Result: A fuel shut-off valve is not fully open.
Repair: Move all shut-off valves to the fully open position.
Result: All shut-off valves are in the fully open position.
Proceed to Test Step 3.
3. Fuel Level in Tank
Note: If the level in the fuel tank is low, the hot return fuel can raise the temperature in the fuel tank.
A. Check the fuel level in the tank.
Fuel level
Result: The fuel level in the tank is low.
Repair: Replenish the fuel tank at the earliest opportunity.
Result: The fuel level in the tank is OK.
Proceed to Test Step 4.
4. Return Fuel Cooler (If Equipped)
A. Check the return fuel cooler for debris or damage.
Note: Debris between the fins of the return fuel cooler core restricts air flow through the core.
Return fuel cooler
Result: The return fuel cooler has excessive debris or is damaged.
Repair: Clear the debris from the return fuel cooler or replace the return fuel cooler.
Result: The return fuel cooler is OK.
Proceed to Test Step 5.
5. Location of the Fuel Tank and Fuel Lines
A. Make sure that the fuel tank and fuel lines are not close to a heat source.
Fuel tank and fuel line locations
Result: The fuel tank is close to a heat source.
Repair: Shield the fuel tank from the heat source.
Result: A fuel line is close to a heat source.
Repair: Reroute or shield the fuel line from the heat source.
Result: The fuel tank and fuel lines are not close to a heat source.
Contact the Dealer Solutions Network (DSN).