P1188 — Jaguar — O2 Sensor Heater Circuit Resistance

P1188 (Jaguar): O2 Sensor Heater Circuit Resistance — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

O2 Sensor Heater Circuit Resistance. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain

Symptoms

  • Check Engine light illuminated
  • Increased fuel consumption
  • Hesitation or rough engine idle
  • Reduced engine performance
  • Failed emissions test

Possible causes

  • Faulty oxygen sensor heater element
  • Blown fuse for the O2 sensor heater circuit
  • Corroded or damaged wiring harness
  • Loose electrical connector at the O2 sensor
  • Failed Engine Control Module (ECM)

What to check

  • Inspect the O2 sensor wiring and connector for signs of damage or corrosion
  • Check the fuse box for any blown fuses related to the O2 sensor heater circuit
  • Measure the resistance of the oxygen sensor heater element using a multimeter
  • Verify the presence of battery voltage at the O2 sensor harness connector
  • Test for continuity in the ground circuit between the sensor and the ECM