Electronic Throttle Control in Power Limiting Mode
2011-2014 Ford F-150 3.7L V6
Description
The Electronic Throttle Control (ETC) system has entered power limiting (limp) mode. The PCM has restricted throttle opening due to a detected fault in the ETC system, limiting vehicle speed and acceleration for safety.
Symptoms
- Severely reduced engine power
- Throttle response very limited
- Vehicle may only idle or drive slowly
- Check Engine Light
- Possible ETC warning light
Common Causes
- ETC system fault detected
- Throttle body malfunction
- Accelerator pedal position sensor fault
- Wiring issue in ETC circuit
- PCM detected conflicting throttle signals
Diagnostic Steps
- Check for other ETC-related DTCs first
- Inspect accelerator pedal position sensor
- Check throttle body operation
- Inspect all ETC wiring for damage
- Key off/on cycle may temporarily restore normal operation
Repair Notes
Diagnose and repair the root ETC fault. May require throttle body or pedal sensor replacement.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1579 on Other Vehicles
Common Questions
What does code P1579 mean on a 2011-2014 Ford F-150?
P1579 stands for "Electronic Throttle Control in Power Limiting Mode". The Electronic Throttle Control (ETC) system has entered power limiting (limp) mode. The PCM has restricted throttle opening due to a detected fault in the ETC system, limiting vehicle speed and acceleration for safety.
What are the symptoms of P1579 on a Ford F-150?
Common symptoms of P1579 include: Severely reduced engine power, Throttle response very limited, Vehicle may only idle or drive slowly, Check Engine Light, Possible ETC warning light.
What causes P1579 on a 2011-2014 Ford F-150?
Common causes of P1579 include: ETC system fault detected, Throttle body malfunction, Accelerator pedal position sensor fault, Wiring issue in ETC circuit, PCM detected conflicting throttle signals.