C1551EPS ignition (IG) supply voltage fault
- Toyota/Lexus code · Power steering
- Lights a warning lamp
- How the car detects it
- The power steering unit measured its ignition (IG) supply voltage out of range, so assistance is reduced. 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
- PossibleECU-IG fuse or IG supply wiring
- PossibleWeak battery
- RareEPS 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.