U0587Invalid Data Received From Radiator Anti-Tamper Device
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Some low-emission vehicles have a radiator coated with a catalyst that converts ground-level ozone, known as direct ozone reduction (DOR) or by BASF's trade name PremAir; it earns an emissions credit, and CARB then requires the OBD system to monitor it. A Ford patent filed by Swedish inventors describes the matching sensor: it is pressed into the radiator fins, reports radiator temperature, since the coating works above roughly 60 °C, and sends an encrypted message so the engine controller knows the original part is fitted; a frangible pin stops it being moved to another radiator. U0587 means that message arrives but fails verification or plausibility. No manufacturer documents U0587 publicly. U0286 is the lost-communication code.
- What you may notice
- Check engine light on
- No noticeable change in driving or cooling
- Likely causes
- LikelyRadiator replaced with an uncoated part or sensor moved from another radiator
- PossibleAnti-tamper sensor internally faulty
- RareCorroded connector or wiring at the radiator
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €150 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.