16414/P0030/000048 – Oxygen (Lambda) Sensor Heating Circuit: B1 S1: Malfunction / Open Circuit

Possible Symptoms

  • Malfunction Indicator Light (MIL) ON

Possible Causes

  • Faulty O2 sensor heater circuit
  • Wiring/Connector issue
  • Faulty ECM

Possible Solutions

  • Inspect and test O2 sensor heater circuit as per repair manual
  • Inspect and test wiring harness as per wiring diagram
  • Replace ECM if O2 sensor and wiring harness are to factory design