Practice question

An oxygen (O2) sensor on a fuel-injected motorcycle primarily provides feedback about:

  1. Front fork oil viscosity grade stamped on the damper
  2. Brake-pad friction coefficient directly
  3. Whether the exhaust mixture is relatively rich or lean so the ECM can trim fueling
  4. Wheelbase length in millimetres

Answer: C — Whether the exhaust mixture is relatively rich or lean so the ECM can trim fueling

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