Throttle Control Unit Throttle Position Malfunction
Findings, check these first
- Failing TCU throttle position sensing
- Worn TCU internal sensor
- Binding throttle linkage
- Corroded connections
- TCU fault
Standard procedure
- Check throttle linkage freedom
- Test TCU position output
- Inspect connections
- Verify against pedal input
- Replace the TCU per test data
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: P1586 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1586: Throttle Control Unit Throttle Position Malfunction
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
- P1586 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1586: Throttle Control Unit Throttle Position 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 P1586. Include your vehicle, the issue and a source if you have one.