C1259 on Hyundai

Steering angle sensor signal error (Hyundai)

Severity: Severity not verified — if the car runs badly, have it inspected

The sources describe the fault and lamps but do not rate drive safety; steering and stability systems are safety-critical, so have it checked.

Safety-critical system: explanation only, no DIY steps. Source: how we rate severity

This page covers only what differs on Hyundai. For what C1259 means, the ranked causes and the test order, see the C1259 guide.

What's different on Hyundai

Hyundai

2009 · Elantra
Supported by vehicle data
Hyundai TSB-09-01-008 prescribes an EPS software update for warning lamps with C1259 and C1260. Whether the bulletin is still current is not verified.

TSB-09-01-008Status unverified
EPS software update, DTCs C1259 (EPS) and C1260 (ESC)
2009elantra · NHTSA 10029150
Updates EPS software for warning lamps that come on with C1259 and C1260.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Sources and review

Hyundai TSB-09-01-008: EPS software update, DTCs C1259 (EPS) and C1260 (ESC) — Hyundai Motor America via NHTSA
Hyundai Venue (QX) repair procedures: Motor Driven Power Steering DTC table — Hyundai Motor Company (service manual mirror at hvenueqx.com)

Last reviewed: October 15, 2026
Written by: Saurabh K.
Editorial review: Pending
Technician review: Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error