C1531EPS control unit internal fault
- Toyota/Lexus code · Power steering
- Lights a warning lamp
- How the car detects it
- The power steering control unit found a fault in its own electronics. Check its power, ground and connectors before replacing it. 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 control unit
- RarePoor power or ground connection
- 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.