Fan Secondary High With Fans Off
Findings, check these first
- Shorted fan secondary monitor wire
- Stuck fan relay backfeeding voltage
- Failed monitor sensor
- Wiring short to power
- PCM input fault
Standard procedure
- Verify the fans are truly off when commanded off
- Test the relay for sticking contacts
- Inspect monitor wiring for shorts to power
- Check the sensor
- Replace the relay or repair wiring
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: P1473 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1473: Fan Secondary High With Fan(s) Off
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
- P1473 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1473: Fan Secondary High With Fans Off
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 P1473. Include your vehicle, the issue and a source if you have one.