FMI 14 - Engine Protection Active
Engine protection features are actively limiting performance.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine control module (ECM) is monitoring parameters and has detected something out of range. It's taking action to protect the engine by limiting power or shutting systems down to prevent damage.
What the computer is actually seeing
The ECM sees inputs from various sensors like oil pressure, coolant temperature, etc. If any values exceed or fall below critical thresholds, it triggers protection protocols.
What a healthy reading looks like
Oil pressure should be between 20-80 PSI when running. Coolant temperature should stay below 220°F under load. Fuel pressure should be around 50-65 PSI.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check engine oil level and condition. If low or dirty, change oil and add to correct level.
- 22. Inspect oil pressure sensor wiring and connector for damage. Repair as necessary.
- 33. Verify coolant level and check for leaks. Replace coolant if needed.
- 44. Check for any active codes in the ECM related to temperature or pressure. Address those issues first.
- 55. If everything looks good, test the oil pressure with a mechanical gauge to confirm the reading from the ECM.
- 6Decision Point: If the oil pressure is below normal values, replace the oil pump or address leaks. If fine, move to check other systems.
Common causes
- Low oil pressure due to leaks or pump failure
- Overheating from coolant leaks or failed thermostat
- Faulty sensors sending incorrect data
- Excessive exhaust gas temperatures
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, it's not safe to drive. The engine may be at risk of damage.
Will this error come back after clearing?
If the underlying issue isn't fixed, yes, the code will likely return.
Why does this code sometimes pair with overheating codes?
Overheating can cause low oil pressure, which triggers this engine protection.”
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