Urgency: High
Reduced Engine Power Light
Have this checked promptly. It is not an immediate stop, but do not ignore it for long.
What the Reduced Engine Power Light Means
The reduced engine power light on a your car means the ECU has deliberately limited performance (limp mode) to protect the engine or transmission after detecting a fault. The car will feel sluggish and rev-limited.
Common Causes
- Throttle body or accelerator pedal sensor fault
- Turbo/boost problem
- Multiple sensor faults
- Transmission fault triggering protection
- Serious misfire or emissions issue
How to Fix It
- Pull over safely if performance is unsafe
- Try a full restart to clear a temporary limp mode
- Scan for the fault code that triggered it
- Repair the specific cause (often throttle/pedal sensor)
- Clear codes and confirm full power returns
Related DTC Codes
| Code | Meaning |
|---|---|
P0101 | Mass Airflow Sensor Range/Performance The MAF sensor reading is out of expected range, commonly from contamination or an intake leak. |
P0335 | Crankshaft Position Sensor Circuit The crankshaft position sensor signal is faulty, which can cause stalling or a no-start condition. |
U0100 | Lost Communication With ECM/PCM A control module has lost communication on the CAN bus, which can trigger multiple warning lights. |