Chassis, generic

C0112 ABS Activation Frequency Too High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleRequired
Limp modePossible

C0112 is not found in any accessible J2012 table or in the NHTSA bulletin index, and no manufacturer documents it publicly. Read literally, the title flags anti-lock control that starts again and again although the wheel situation does not justify it, as opposed to one overlong event (C0111). Nissan and Unisia patented a counter that sums pressure-release time across successive control cycles; when it keeps growing past roughly 0.5 s because one wheel speed sensor reads too high, that sensor is judged faulty and left out of the reference speed. The Bosch patent of 1988 switches ABS off when slip persists without braking. Plausible causes are a tyre of the wrong size, a cracked or loose sensor ring and electrical noise on a speed signal.

Likely causes

Tyre or wheel of the wrong rolling circumference
Cracked, loose or contaminated sensor ring
Interference or intermittent contact on a wheel speed sensor circuit

Symptoms

  • ABS kicks in at low speed or on dry road without reason
  • ABS warning lamp on after repeated interventions

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–500
Time0.3–2.5 h

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

Parts involved

abs control modulewheel speed sensors

Related codes

C0111C0080C0060

References: patents.google.com, patents.google.com, bosch-mobility.com.