C1562

Code

Generic C — Chassis

Steering Angle Sensor Signal/Calibration Fault

Brand: Generic

Type: C — Chassis

Views: UK: 10 EN: 14 RU: 12

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Page language: EN

Causes

Steering angle sensor electrical fault (open/shorted wiring, poor connector contact)
Sensor miscalibration or lost zero-point (center) reference
Failed steering angle sensor (internal electronics)
Faulty ABS/ESC/ECU that reads SAS data or internal software error
CAN/LIN communication fault or bus interference
Damage to sensor or wiring from steering column work, collision, or wear

Symptoms

ABS, ESC, or traction control warning lamp illuminated
Steering angle reading off or fluctuating in live data (not centered when steering wheel is centered)
Loss of stability or traction control functions
Erratic behavior of lane-keep, adaptive cruise, or other driver-assist systems that use steering angle
Possible limp-home or reduced functionality messages

What to check

Read all active and history codes from ABS/ESC and powertrain modules; note freeze-frame data
Check for related communication codes (U-codes) on CAN or LIN networks
Visually inspect connectors and wiring at the steering column and steering angle sensor for corrosion, damage, or loose pins
Verify vehicle battery voltage is within specification and charging system is good
Check whether the steering wheel is physically centered and wheels are straight
View live-data steering angle value while slowly turning wheel to observe smoothness, continuity, and correct direction

Signal parameters

Sensor supply voltage: typically 5 V reference (may be powered from module; confirm spec)
Ground: low resistance to chassis ground (
Signal output: often varies with angle — typical analog range 0.5–4.5 V or digital/CAN message carrying angle in degrees
Center (zero) reading: ~0 V offset or mid-supply depending on design; expected ~0° when wheel straight
Angle range: commonly ±540° to ±720° total rotation (depends on vehicle)
CAN bus idle voltages: CAN_H ~2.5–3.5 V, CAN_L ~1.5–2.5 V; differential ~2.5 V when active; check for proper termination (~60 Ω)

Diagnostic algorithm

Connect a professional scan tool; record C1562 and any related codes in ABS/ESC/steering modules and U-codes from gateway/CAN. Clear codes and attempt to re-trigger to confirm persistence.
Verify battery voltage >12.4 V during test; charge if low. Re-scan. Low voltage can corrupt calibration.
Visually inspect connectors and harness at the steering column and SAS for damage, corrosion, or loose pins; wiggle harness while watching live data for intermittent changes.
Check grounds and power: measure reference supply (usually 5 V) at sensor connector and chassis ground continuity. Repair any open/shorts.
Use live-data: with wheel centered, confirm sensor angle reads approx. 0° (or midpoint per manufacturer). Slowly turn wheel and confirm smooth, proportional change and return to center. Note any sudden jumps or stuck values.
If the sensor output is analog, probe signal with DMM or oscilloscope to confirm expected voltage range and smooth waveform during rotation. If digital/CAN, monitor CAN messages and compare steering angle message to expected values and other modules (ABS vs ECU).
Inspect steering column for physical misalignment or replaced components. If steering or wheel was removed, perform manufacturer-specific SAS recalibration/zeroing with scan tool per service procedure.
If wiring and calibration are good but fault persists, swap or bench-test SAS (if possible) or replace sensor and then perform required calibration. After repair, clear codes and perform a road test to verify.
If CAN/LIN communication faults exist, diagnose bus wiring, terminations, and other modules on the same network; repair any network faults and recheck SAS communications.

Likely causes

Damaged or corroded connector at steering column
Broken or chafed wiring harness where it flexes (column to chassis)
Sensor lost center reference after wheel/column replacement or battery disconnect without recalibration
Failed SAS module/encoder
Intermittent CAN bus fault or improper termination