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Home / DTC / P0167 — Heater circuit malfunction of oxygen sensor. Bank 2 - sensor 3

P0167 — Heater circuit malfunction of oxygen sensor. Bank 2 - sensor 3

Detailed page for trouble code P0167.

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Code

P0167

LAND ROVER P — Powertrain

Heater circuit malfunction of oxygen sensor. Bank 2 - sensor 3

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
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Completed 100%
Page language: EN

Causes

  • Open circuit in heater wiring (broken wire, connector fault)
  • Short to battery or ground in the heater circuit
  • Failed oxygen sensor heater element
  • Corroded/loose connector or pins at the sensor
  • Blown fuse or faulty relay supplying the heater circuit
  • Poor ground connection

Symptoms

  • Check Engine Light (MIL) illuminated
  • Longer engine warm‑up and delayed closed‑loop operation
  • Reduced fuel economy or rough idle until engine warms
  • Increased tailpipe emissions, possible failed emissions test
  • Possible intermittent or persistent code depending on wiring condition

What to check

  • Read stored codes and freeze‑frame data with scan tool; record history and pending codes
  • Perform a visual inspection of Bank 2 Sensor 3 connector, wiring harness, and nearby components for damage, chafing, or corrosion
  • Inspect and test relevant fuses and relays for the oxygen sensor heater circuit
  • Backprobe the sensor heater connector to verify presence of battery voltage (key on/engine off) and/or PCM switching (engine running) as specified
  • Measure heater element resistance at the sensor connector with sensor disconnected (compare to spec)
  • Check for continuity between sensor heater wires and ECM connector; check for shorts to ground or battery

Signal parameters

  • Expected heater resistance (room temp): typically ~2–20 ohms (refer to vehicle repair data for exact spec)
  • Supply voltage at heater supply pin: ~12 V with key on (or switched by relay/PCM)
  • Heater current during operation: typically in the amp range (0.5–3 A depending on sensor)
  • PCM heater driver voltage/pulse duty (varies by model)
  • Warm‑up time to reach operating temp: usually

Diagnostic algorithm

  1. Confirm the P0167 code and clear then attempt to re‑create; note any freeze‑frame data and related codes
  2. Visually inspect Bank 2 Sensor 3 connector and wiring for damage, corrosion, or water ingress; repair connector issues as needed
  3. Check fuses/relays related to oxygen sensor heaters; replace any blown fuses or faulty relays
  4. Unplug the sensor harness at the sensor. Measure heater element resistance across the heater pins and compare to manufacturer spec. If open or out‑of‑range, replace the O2 sensor
  5. With ignition on, backprobe the sensor connector to verify battery voltage is present at the heater supply pin (if applicable). If voltage missing, trace upstream to relay/fuse/short
  6. Start engine (if safe) and verify PCM is switching the heater ground/voltage (use a lab scope or DVOM to observe switching/pulse). If PCM is not commanding, check inputs to PCM and related relays/fuses
  7. Check continuity from the sensor heater pins to the ECM connector; locate and repair any opens or shorts to power/ground
  8. If harness and sensor check good but driver output at the ECM is absent or shorted to ground/power, consult manufacturer procedures; replace PCM only after all wiring and sensor possibilities are thoroughly eliminated
  9. After repairs, clear codes and perform a drive cycle to confirm the fault does not return

Likely causes

  • Open or high‑resistance wiring between ECM and Bank 2 Sensor 3 heater
  • Failed heater element inside the oxygen sensor
  • Corroded/contaminated or pushed‑out connector pins causing intermittent contact
  • Blown fuse or damaged relay for oxygen sensor heaters

Fault status

⚠️ Status
Heater circuit malfunction detected for oxygen sensor Bank 2 Sensor 3 — ECM detected an open, short, or unacceptable heater circuit condition.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.8-2.5 hours

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320

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