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Home / DTC / P0097 — Intake Air Temperature Sensor 2 Low Input Circuit

P0097 — Intake Air Temperature Sensor 2 Low Input Circuit

Detailed page for trouble code P0097.

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P0097

LAND ROVER P — Powertrain

Intake Air Temperature Sensor 2 Low Input Circuit

Brand: LAND ROVER
Type: P — Powertrain
Views: UK: 5 EN: 10 RU: 11
AI status
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Page language: EN

Causes

  • Short to ground on IAT sensor 2 signal circuit
  • Faulty/failed IAT sensor 2 (open/shorted thermistor)
  • Corroded/loose connector or pin damage at sensor or ECM
  • Broken or chafed wiring contacting chassis ground
  • Poor or missing sensor/ECM ground or reference voltage
  • Intermittent connector contact due to moisture or dirt

Symptoms

  • Check engine light (MIL) illuminated
  • Reduced engine performance, rough idle or hesitation (depending on engine strategy)
  • Rich/lean mixture symptoms or increased emissions
  • Possible poor fuel economy
  • Stored freeze frame data may show low sensor voltage or cold air temperature reading

What to check

  • Read/record freeze frame and live data (IAT sensor 2 voltage and temperature)
  • Retrieve pending/permanent codes and any related codes (IAT sensor 1, MAF, MAP, ECM power/ground codes)
  • Visually inspect IAT sensor 2 wiring harness and connector for damage, corrosion, contamination or pin push‑out
  • Backprobe the IAT2 signal and ground with ignition ON and compare voltage to expected range
  • Measure sensor resistance (with sensor disconnected) at a known ambient temperature and compare to specification

Signal parameters

  • Typical IAT sensor type: negative temperature coefficient (NTC) thermistor wired to an ECU reference (approx. 5 V) and signal input
  • Expected signal voltage (approximate): 0.5–4.5 V under normal conditions; low input fault triggered when signal is near 0–0.2–0.3 V
  • Expected resistance (approximate, depending on sensor design and ambient temp): ranges from a few hundred ohms (hot) to tens of kiloohms (cold). Consult Land Rover spec for exact Ω vs °C curve

Diagnostic algorithm

  1. Confirm DTC P0097 with OBD-II scanner. Note freeze frame data and monitor live IAT2 voltage/temperature. Check for related codes (P0096, P0112, P0113, P0118).
  2. Visual inspection: with ignition OFF, inspect the IAT2 connector, wiring loom, and nearby harness for chafing, pin corrosion, bent or pushed‑out terminals, or evidence of water ingress. Repair any obvious damage.
  3. Backprobe with ignition ON (engine OFF) and measure IAT2 signal voltage at connector. If voltage is below ~0.2–0.3 V, suspect short to ground or failed sensor.
  4. Disconnect IAT2 sensor and measure resistance across its terminals at ambient temperature. Compare to Land Rover specification or typical NTC curves. If out of expected range (very low or near short), replace sensor.
  5. With sensor disconnected, check continuity from the signal pin at the harness to the ECM input pin. Check for short to ground (low ohms from signal to chassis ground) and short to reference voltage. Repair wiring as required.
  6. Verify ECM reference voltage and ground circuits. Measure ECM 5 V reference (if used) and engine/chassis ground at connector. Repair poor grounds or reference supply issues.
  7. If wiring and sensor check OK, install a known-good replacement IAT2 sensor and clear codes. Re-test engine and read live data to ensure normal voltage/temperature response across temperature changes (e.g., ambient air or warm engine intake).
  8. If fault persists after sensor and wiring verified/repaired, consider ECM input driver fault — confirm with manufacturer diagnostic procedures before replacing ECM.

Likely causes

  • IAT sensor 2 shorted to ground or damaged wiring harness
  • Failed IAT 2 thermistor (internal short or low resistance)
  • Connector corrosion or pin pushed out causing low reading
  • Poor circuit ground or missing reference at ECM (less common)

Fault status

⚠️ Status
IAT Sensor 2 circuit reports abnormally low voltage (low input). Possible short to ground or failed sensor/wiring. Requires inspection and electrical testing.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

P0096 P0112 P0113 P0118 P0101
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