Throttle Control Unit Input Circuit Malfunction
Findings, check these first
- Open TCU input circuit
- Corroded TCU connector
- Failed input sensor
- Wiring damage
- TCU fault
Standard procedure
- Test input circuit continuity
- Inspect the TCU connector
- Verify input sensor output
- Check TCU power and ground
- Repair wiring or replace the unit
Code lookup
Type a code above, or start from a symptom or a common code.
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Sources and review
Review: checked against the recorded source material.
- OBDII.pro: P1584 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1584: TCU Detected IPE Circuit Malfunction
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
- P1584 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1584: Throttle Control Unit Input Circuit Malfunction
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.
Last updated 2026-09-06.
Report a correction for P1584. Include your vehicle, the issue and a source if you have one.