Reduced Engine Power Message
That message means the computer has cut throttle authority on purpose to protect the engine. The car will only creep. Read the codes before driving far.
What it feels like
- The accelerator stops responding normally and the car will not rev past idle-ish
- A warning chime and a message on the dash
- The car crawls at a fixed slow speed
- Often paired with a traction or stability light
Codes that usually produce this
Check these first, in this order
Free checks first. Nothing here costs money except the fuel you burn.
- 1
Read all modules, not only the engine module, and write down every code.
What you'll seeOne code that points at throttle, pedal, or airflow. That is the trigger.
- 2
Look into the throttle body bore at the top of the engine for carbon around the plate.
What you'll seeA clean silver bore. A black ring can make the plate stick and set the message.
- 3
Check battery voltage at rest and while cranking with a meter.
What you'll seeAt least 12.4V at rest. Low voltage causes modules to disagree and cut power.
Stop and get it looked at if
- The engine cuts out entirely.
- Multiple warning lights are on at once.
- You cannot get above walking pace on a road with traffic.