C1554EPS power supply relay fault
- Toyota/Lexus code · Power steering
- Lights a warning lamp
- How the car detects it
- The relay that powers the assist motor inside the EPS unit doesn't work correctly, so assistance stops. When the power steering limits or stops its assistance, the steering becomes heavy but still works mechanically.
- What you may notice
- P/S (power steering) warning light
- Heavy steering
- Likely causes
- PossibleEPS fuse or main power wiring
- PossibleEPS control unit
- Sources
Backed by at least two independent sources.
From Obdaryn's Toyota/Lexus pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.