CAT Engine 62 Fault Code: Low Engine Coolant Level Shutdown
Low Engine Coolant Level Shutdown · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
CAT flash code 62, also logged as SPN 111 FMI 1 and event code EID 058, means the ECM has detected a low engine coolant level and will shut the engine down once all shutdown conditions are met. It applies to C10, C12, C15, and C16 engines. The only listed cause is low coolant.
Critical severity. This code leads to an engine shutdown once the ECM confirms low coolant conditions. Running an engine low on coolant risks overheating and serious internal damage, so this should be treated as a stop-now condition, not something to defer.
What does CAT Engine error code 62 mean?
CAT fault code 62, recorded as SPN 111 FMI 1, is the ECM's response to a detected low engine coolant level. When the conditions for shutdown are met, the ECM will shut the engine down to protect it from running without adequate coolant.
On the diagnostic scan tool, this event shows up as EID 058, and on the J1939 data link it appears as SPN 111 FMI 01, which may also show on other devices reading that data link. The flash code 62 will display on the diagnostic lamp.
One quirk of this fault is that the ECM will not act on it until the engine has been running above 0 rpm for 60 seconds. Before that, the scan tool will show 'No Engine Speed' in the engine status box, which is a normal part of the startup sequence and not a separate fault.
What triggers a CAT Engine 62 code?
The ECM will not act on this condition until engine speed is greater than 0 rpm for 60 seconds. Once that condition is satisfied, the engine will shut down after all of the conditions for shutdown are met.
Common causes of 62
- Low engine coolant level, this is the only cause listed for this code.
How to troubleshoot CAT Engine 62: first checks
- Check the coolant level in the system as soon as it is safe to do so, and let the engine cool first if it feels hot before opening any cap.
- Inspect for visible coolant leaks around hoses, the radiator, water pump, and engine block that could explain a drop in level.
- Check the coolant level sensor and its wiring and connectors for corrosion, looseness, or damage, since a wiring fault can sometimes mimic a real low-level condition.
- Confirm the engine was actually running above 0 rpm for at least 60 seconds before assuming the code is a false trigger, since the ECM ignores this condition before that point.
- Look at the diagnostic scan tool status screen for the 'No Engine Speed' message and the EID 058 or SPN 111 FMI 01 event to confirm how the ECM logged the event.
How the code clears
No separate clearing step is listed for this code. Correct the low coolant condition, top off or refill the coolant system as needed, and repair any leak found. Once coolant is at the proper level and no fault condition is present, the code should not recur under normal operation.
Affected models and serial ranges
62 appears in our records across 4 CAT Engine models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| C10 | Serial range not listed in source records |
| C12 | Serial range not listed in source records |
| C15 | Serial range not listed in source records |
| C16 | Serial range not listed in source records |
Frequently asked questions
What does CAT flash code 62 mean?
It means the ECM has detected a low engine coolant level. This is logged as SPN 111 FMI 1, also shown as event code EID 058 on the CAT data link.
Will the engine shut down when code 62 appears?
Yes. The engine will shut down after all of the conditions for shutdown are met, so this code should be treated seriously and not ignored.
Why does the scan tool show 'No Engine Speed' with this code?
The ECM will not act on the low coolant condition until the engine has been running above 0 rpm for 60 seconds. Before that time, the scan tool displays 'No Engine Speed' in the engine status box.
What causes CAT code 62 / SPN 111 FMI 1?
The only listed cause is a low engine coolant level. Checking for leaks and topping off coolant is the main corrective action.
Which CAT engines can show fault code 62?
This code applies to the C10, C12, C15, and C16 engine models.
Is there a special reset procedure for code 62?
No reset procedure is listed for this code. Correcting the low coolant condition and repairing any leak should resolve it.