Throttle Control Unit Malfunction
Findings, check these first
- Failed throttle control unit
- Open or shorted control unit circuits
- Corroded control unit connector
- Low system voltage
- PCM communication fault to the unit
Standard procedure
- Check system voltage and grounds first
- Inspect the control unit connector for corrosion
- Test power and signal circuits to the unit
- Verify PCM communication with a scan tool
- Replace the throttle control unit after circuit confirmation
Code lookup
Type a code above, or start from a symptom or a common code.
Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.
Sources and review
Review: checked against the recorded source material.
- OBDII.pro: P1585 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1585: Throttle Control Unit Malfunction
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
- P1585 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1585: Throttle Control Unit Malfunction
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.
Last updated 2026-09-04.
Report a correction for P1585. Include your vehicle, the issue and a source if you have one.