What causes P1578 on a Ford?

Carbon-restricted throttle bore limiting airflow Weak throttle motor Low system voltage starving the throttle motor Binding throttle plate shaft PCM limiting power for a perceived fault

How do I fix P1578 on a Ford?

Clean the electronic throttle body thoroughly Check charging system voltage under load Test throttle plate movement for binding Look for companion ETC codes pointing at the root cause Replace the throttle body if the motor cannot meet demand

P1578 Electronic Throttle Control Power Less Than Demand

Q: What does P1578 mean on a Ford?

P1578 — Electronic Throttle Control Power Less Than Demand. Applies to F-150, Explorer, Expedition, Mustang with electronic throttle.

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: F-150, Explorer, Expedition, Mustang with electronic throttle

What does P1578 mean on a Ford?

P1578 — Electronic Throttle Control Power Less Than Demand. This Ford-enhanced code applies to F-150, Explorer, Expedition, Mustang with electronic throttle.

Common causes of P1578

Carbon-restricted throttle bore limiting airflow
Weak throttle motor
Low system voltage starving the throttle motor
Binding throttle plate shaft
PCM limiting power for a perceived fault

How to fix P1578

Clean the electronic throttle body thoroughly
Check charging system voltage under load
Test throttle plate movement for binding
Look for companion ETC codes pointing at the root cause
Replace the throttle body if the motor cannot meet demand