Engine Power Output Derate
The engine is operating at reduced power output due to a detected issue.
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 is running slower and less powerful than normal because the system has detected a fault, likely to protect itself from damage.
What the computer is actually seeing
The engine control module (ECM) is monitoring various inputs like throttle position, fuel pressure, and engine temperature. When it detects a malfunction that could cause damage, it limits the engine’s power to prevent more severe problems.
What a healthy reading looks like
Throttle position should be at 0-100% as commanded, fuel pressure around 40-60 psi (varies by engine), and engine temperature should be within normal ranges of 180-220°F.
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 for any visible wiring or connector damage related to the throttle position sensor and fuel system. Repair as necessary.
- 22. Inspect fuel pressure; it should be between 40-60 psi at idle. If low, check the fuel pump and filter.
- 33. Monitor engine temperature; if it's above normal (over 220°F), check for coolant leaks or thermostat issues.
- 44. Test throttle position sensor operation using a multimeter; it should produce a consistent voltage output between 0.5 volts (0% throttle) and 4.5 volts (100% throttle). If it's out of range, replace the TPS.
Common causes
- Faulty throttle position sensor (TPS)
- Low fuel pressure
- Engine overheating
- Wiring issues or connector problems in the throttle or fuel systems
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not safe to drive, as power is limited and you could lose acceleration unexpectedly.
Will the code come back after clearing it?
Yes, if the underlying issue isn't fixed, the code will return.
Why does this code sometimes pair with overheating issues?
The system limits power to prevent engine damage during overheating, triggering this fault.
Working a real vehicle right now?
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