P1113 — Volkswagen — Oxygen Sensor Heater Resistance Too High Bank 1 Sensor 1

P1113 (Volkswagen): Oxygen Sensor Heater Resistance Too High Bank 1 Sensor 1 — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Oxygen Sensor Heater Resistance Too High Bank 1 Sensor 1. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain

Symptoms

  • Check Engine light illuminated
  • Increased fuel consumption
  • Rough engine idle
  • Reduced engine performance
  • Failed emissions test

Possible causes

  • Faulty oxygen sensor heater circuit
  • Damaged or melted sensor wiring
  • Corroded or loose sensor electrical connector
  • Blown fuse for the oxygen sensor heater
  • Internal failure of the oxygen sensor

What to check

  • Inspect the oxygen sensor connector for corrosion or loose pins
  • Check the fuse related to the oxygen sensor heater circuit
  • Measure the resistance of the oxygen sensor heater element using a multimeter
  • Verify the presence of voltage and ground at the sensor harness side
  • Inspect wiring harness for signs of physical damage or shorts to ground