Exhaust Temperature Is High
Use this procedure to troubleshoot a high exhaust temperature. Also, use this procedure if one of the following event codes is active or logged.
Show/hide table
| J1939 Code and Description | Comments |
|---|---|
| 173-16
Engine Exhaust Gas Temperature : High - moderate severity (2) |
The calculated exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is derated. The code is logged. |
| 1137-0
Engine Exhaust Gas Port 1 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1138-0
Engine Exhaust Gas Port 2 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1139-0
Engine Exhaust Gas Port 3 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1140-0
Engine Exhaust Gas Port 4 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1141-0
Engine Exhaust Gas Port 5 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1142-0
Engine Exhaust Gas Port 6 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1143-0
Engine Exhaust Gas Port 7 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1144-0
Engine Exhaust Gas Port 8 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1145-0
Engine Exhaust Gas Port 9 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1146-0
Engine Exhaust Gas Port 10 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1147-0
Engine Exhaust Gas Port 11 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1148-0
Engine Exhaust Gas Port 12 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1149-0
Engine Exhaust Gas Port 13 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1150-0
Engine Exhaust Gas Port 14 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1151-0
Engine Exhaust Gas Port 15 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 1152-0
Engine Exhaust Gas Port 16 Temperature : High - least severe (3) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
Show/hide table
| J1939 Code | Comments |
|---|---|
| 1137-15
Engine Exhaust Gas Port 1 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1138-15
Engine Exhaust Gas Port 2 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1139-15
Engine Exhaust Gas Port 3 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1140-15
Engine Exhaust Gas Port 4 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1141-15
Engine Exhaust Gas Port 5 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1142-15
Engine Exhaust Gas Port 6 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1143-15
Engine Exhaust Gas Port 7 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1144-15
Engine Exhaust Gas Port 8 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1145-15
Engine Exhaust Gas Port 9 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1146-15
Engine Exhaust Gas Port 10 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1147-15
Engine Exhaust Gas Port 11 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1148-15
Engine Exhaust Gas Port 12 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1149-15
Engine Exhaust Gas Port 13 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1150-15
Engine Exhaust Gas Port 14 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1151-15
Engine Exhaust Gas Port 15 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
| 1152-15
Engine Exhaust Gas Port 16 Temperature : High - least severe (1) |
The cylinder exhaust temperature has exceeded the trip point for the programmed delay time.
The code is logged. |
Show/hide table
| J1939 Code and Description | Comments |
|---|---|
| 1137-19
Engine Exhaust Gas Port 1 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1138-19
Engine Exhaust Gas Port 2 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1139-19
Engine Exhaust Gas Port 3 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1140-19
Engine Exhaust Gas Port 4 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1141-19
Engine Exhaust Gas Port 5 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1142-19
Engine Exhaust Gas Port 6 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1143-19
Engine Exhaust Gas Port 7 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1144-19
Engine Exhaust Gas Port 8 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1145-19
Engine Exhaust Gas Port 9 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1146-19
Engine Exhaust Gas Port 10 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1147-19
Engine Exhaust Gas Port 11 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1148-19
Engine Exhaust Gas Port 12 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1149-19
Engine Exhaust Gas Port 13 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1150-19
Engine Exhaust Gas Port 14 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1151-19
Engine Exhaust Gas Port 15 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
| 1152-19
Engine Exhaust Gas Port 16 Temperature : Data Error |
The alarm output is activated.
The code is logged. |
Show/hide table
| J1939 Code and Description | Comments |
|---|---|
| 5686-0
Engine Exhaust Gas Port #1 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5687-0
Engine Exhaust Gas Port #2 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5688-0
Engine Exhaust Gas Port #3 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5689-0
Engine Exhaust Gas Port #4 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5690-0
Engine Exhaust Gas Port #5 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5691-0
Engine Exhaust Gas Port #6 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5692-0
Engine Exhaust Gas Port #7 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5693-0
Engine Exhaust Gas Port #8 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5694-0
Engine Exhaust Gas Port #9 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5695-0
Engine Exhaust Gas Port #10 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5696-0
Engine Exhaust Gas Port #11 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5697-0
Engine Exhaust Gas Port #12 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5698-0
Engine Exhaust Gas Port #13 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5699-0
Engine Exhaust Gas Port #14 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5700-0
Engine Exhaust Gas Port #15 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
| 5701-0
Engine Exhaust Gas Port #16 Difference from Average Temperature : High - most severe (3) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The engine is shutdown. The code is logged. |
Show/hide table
| J1939 Code and Description | Comments |
|---|---|
| 5686-15
Engine Exhaust Gas Port #1 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5687-15
Engine Exhaust Gas Port #2 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5688-15
Engine Exhaust Gas Port #3 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5689-15
Engine Exhaust Gas Port #4 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5690-15
Engine Exhaust Gas Port #5 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5691-15
Engine Exhaust Gas Port #6 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5692-15
Engine Exhaust Gas Port #7 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5693-15
Engine Exhaust Gas Port #8 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5694-15
Engine Exhaust Gas Port #9 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5695-15
Engine Exhaust Gas Port #10 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5696-15
Engine Exhaust Gas Port #11 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5697-15
Engine Exhaust Gas Port #12 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5698-15
Engine Exhaust Gas Port #13 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5699-15
Engine Exhaust Gas Port #14 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5700-15
Engine Exhaust Gas Port #15 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
| 5701-15
Engine Exhaust Gas Port #16 Difference from Average Temperature : High - least severe (1) |
The cylinder exhaust temperature is higher than the average temperature for all the cylinders. The amount of deviation has exceeded the trip point for the programmed delay time.
The code is logged. |
If the engine is shutdown due to a high exhaust temperature, the power to the engine Electronic Control Module (ECM) must be cycled to restart the engine.
- Codes
- Intake air temperature
- Inlet air restriction
- Engine overload
- Deposits or leaks
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| Troubleshooting Test Steps | Values | Results |
|---|---|---|
1. Check for Codes A. Connect Cat® Electronic Technician (ET) to the service tool connector. B. Look for active codes that are associated with the system for the event code. |
Codes |
Result: An associated code is active. Repair: Troubleshoot any associated codes before continuing with this test. Result: A -0, -15, or -16 code is active or logged. Proceed to Test Step 2. Result: A -19 code is active or logged. Repair: Replace the exhaust gas temperature sensor that logged the fault code. Verify that the repair eliminated the problem. |
2. Check for High Intake Air Temperature Note: A one degree increase in the intake manifold temperature will increase the exhaust temperature by approximately three degrees. A. Refer to Troubleshooting, "Intake Manifold Air Temperature Is High" for additional information. |
Temperature |
Result: The intake manifold air temperature is OK. Proceed to Test Step 3. Result: The intake manifold air temperature is NOT OK. Repair: Determine the cause of the high intake manifold air temperature and correct the problem. If the problem is not resolved, proceed to Test Step 3. |
3. Check for a Restriction in the Inlet Air System Note: Inlet air restriction can cause uneven exhaust port temperatures. Cylinders at the front half of the engine may have exhaust port temperatures that are lower than the exhaust port temperatures for the cylinders at the rear half of the engine by A. Check the air filter restriction indicator, if equipped. Refer to the Operation and Maintenance Manual for additional information. B. Measure the inlet air restriction for each turbocharger. Refer to Troubleshooting, "Inlet Air Is Restricted" for additional information. |
Restriction |
Result: The inlet air restriction is OK . Proceed to Test Step 4. Result: The inlet air restriction is NOT OK. An imbalance in the system is discovered. Repair: Repair or replace damaged inlet air system components. Equalize the inlet air restriction for each of the turbochargers. If the problem is not resolved, proceed to Test Step 4. |
4. Check for Engine Overload Note: When the load that is applied to the engine is too large, the engine will run in the lug condition. When the engine is running in the lug condition, engine rpm does not increase with an increase of fuel. |
Load |
Result: The engine is not being overloaded. Proceed to Test Step 5. Result: The engine is being overloaded. Repair: Reduce engine load to an acceptable limit. If the problem is not resolved, proceed to Test Step 5. |
5. Check for Heavy Buildup of Deposits in the Cylinder or Internal Oil Leaks A. Use a borescope to inspect the cylinders. Look for the following conditions: - Deposits on the valve seats - Deposits on the valve faces - Deposits on the cylinder walls that are above the upper limit of the piston stroke - Signs of internal oil leaks |
Deposits and Leaks |
Result: The cylinder check is NOT OK. Repair: Repair or replace damaged components. Verify that the repair eliminated the problem. |
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).
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