OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Chassis generic / SAE

C0034

Left Front Wheel Speed Sensor No Signal

No pulses are received from the left front wheel speed sensor while other wheels report motion. The fault disables ABS and stability control.

SystemChassis
Typegeneric / SAE
GroupC0
Range / number– / 34

Possible causes

  • Sensor internally failed high
  • Wiring open at suspension flex medium

Symptoms

  • ABS warning light on
  • ESC/stability control deactivated
  • Possible reduced brake assist
  • Speedometer may behave erratically

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 80–400 €
  • Estimated time: 0.5–2.5 h
  • Component: wheel speed sensor fl
  • Component: sensor wiring
  • Component: tone ring

Sources

References

sae:J2012

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication