Chassis, generic

C003F Wheel Speed Sensors Rotation Direction Correlation

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

A correlation code set when the directional information from the wheel speed sensors does not agree across wheels or with other motion inputs. Directional (bidirectional) wheel speed sensors tell the ABS/ESC module whether a wheel turns forward or backward, which the module uses for hill-hold, rollback detection and stability functions. The code stores when one wheel reports a rotation direction that is implausible against the others, the selected gear or the yaw and acceleration sensors. It points to a faulty directional sensor, its wiring or the tone ring. Affected functions are disabled and the ABS warning lamp is set while base braking remains. Direction-capable sensor ICs such as Allegro's A19302 send speed plus direction over PW or AK protocol. No manufacturer documents this code publicly.

Likely causes

Faulty directional wheel speed sensor
Damaged tone ring giving false direction
Sensor wiring fault or miswire

Symptoms

  • ABS warning lamp on
  • Hill-hold or stability functions disabled
  • Incorrect rollback or direction detection

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–500
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

wheel speed sensors

Related codes

C0031C0034C0037

References: allegromicro.com, en.wikipedia.org, en.wikipedia.org.