P1114

Code

LAND ROVER P — Powertrain

Intake air temperature 2 - low circuit (super turbo engines)

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 21 EN: 42 RU: 37

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Page language: EN

Causes

Short to ground on IAT2 signal wire
Open or corroded connector/poor contact at IAT2
Faulty IAT sensor (thermistor)
Damaged wiring harness (chafing, water ingress)
PCM/ECU internal fault or poor ground

Symptoms

Malfunction Indicator Lamp (MIL) / Check Engine Light
Erratic or incorrect intake air temperature readings
Rough idle, hesitation, or poor drivability
Reduced fuel economy or altered fuel trims
Possible limp mode or degraded turbo control on some models

What to check

Read and record freeze frame and live data for IAT sensor 1 and 2
Compare IAT2 value to IAT1 and ambient temperature
Visually inspect IAT2 connector and wiring for damage or corrosion
Back-probe IAT2 signal with key ON and engine OFF to measure voltage
Measure sensor resistance with sensor disconnected at ambient temperature
Perform wiggle test on harness while monitoring live data

Signal parameters

Sensor type: NTC thermistor (intake air temp)
Typical resistance at 25°C: ~2–4 kΩ (varies by sensor)
Expected sensor voltage range: ≈0.1–4.9 V depending on temp and circuit
Typical mid-range (ambient) voltage: ≈1.0–3.0 V
Low-circuit fault threshold: voltage below ≈0.2–0.5 V (manufacturer-specific)

Diagnostic algorithm

Retrieve freeze frame and pending codes. Confirm P1114 is current or historic.
With scan tool, view live data: monitor IAT2, IAT1 and ambient temp. Note differences and whether IAT2 reads an implausibly low voltage/temperature.
Visual inspection: check IAT2 sensor connector, pins and wiring for corrosion, bent pins, or water intrusion. Repair any obvious damage.
Back-probe the IAT2 signal pin (key ON, engine OFF). Verify reference voltage (usually ~5 V) at ECU side and signal voltage at sensor connector. If signal is near 0 V, suspect short to ground.
Disconnect the sensor and measure its resistance across terminals at ambient temperature. Compare to manufacturer spec (should change when warmed/cooled). If open/short or out of expected range, replace sensor.
If sensor checks OK, perform continuity/resistance check from sensor connector signal pin to ECU pin to find short/open. Inspect for shorts to chassis ground.
Repair or replace damaged wiring, connectors or sensor as required. After repairs, clear codes and test drive to confirm code does not return and readings are plausible.
If wiring and sensor are good but fault remains, consider ECU/PCM diagnostics or replacement per manufacturer procedures.

Likely causes

IAT sensor 2 failed or shorted
Connector corrosion or disconnected plug at the sensor
Signal wire shorted to ground or pinched against chassis
Water or debris inside connector causing low voltage

Fault status

⚠️ Status

Intake Air Temperature (IAT) Sensor 2 circuit low — check sensor, connector and wiring for short to ground or damage.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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P1114 — Intake air temperature 2 - low circuit (super turbo engines)