Stop Lamp Switch Circuit Fault
Findings, check these first
- Failed stop lamp switch
- Burned-out stop lamps breaking the sense circuit
- Open switch wiring
- Misadjusted switch
- Corroded connector
Standard procedure
- Check all stop lamps including the high-mount
- Test switch continuity
- Verify switch adjustment
- Inspect wiring and connector
- Replace bulbs or switch per findings
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: P1574 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1574: Throttle Position Sensor Disagreement btwn Sensors
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
- P1574 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1574: Stop Lamp Switch Circuit
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 P1574. Include your vehicle, the issue and a source if you have one.