P1113

Code

LAND ROVER P — Powertrain

Intake Air Temperature Sensor 2 high input

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 31 EN: 43 RU: 34

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Page language: EN

Causes

Open or damaged wiring in IAT sensor 2 circuit
Short to battery voltage (VB+) on the IAT2 signal wire
Corroded, bent, or loose connector at the IAT2 sensor
Faulty IAT sensor 2 (open or internally shorted)
Poor or lost sensor reference/ground at ECM
Water intrusion or contamination of the sensor/connector

Symptoms

Malfunction Indicator Lamp (MIL) illuminated
Incorrect intake air temperature displayed in live data (very high or pegged)
Hard starting, especially when hot or cold depending on how ECU compensates
Poor idle, hesitation or reduced driveability
Increased fuel consumption or elevated emissions
Possible limp-home mode or reduced engine power on some vehicles

What to check

Read freeze frame and live data: note IAT2 voltage and temperature value
Compare IAT2 reading to ambient air temperature or IAT1 (if present) for plausibility
Inspect harness and connector for corrosion, damage, water ingress or bent pins
Backprobe the IAT2 signal with ignition ON (engine OFF) and record voltage
Measure resistance of the IAT2 sensor (with sensor disconnected) and compare to spec or expected NTC behavior
Check for continuity between sensor signal and ECM pin; check for short to VB+ and short to ground

Signal parameters

Typical IAT sensor voltage range: approx. 0.2 V (cold) to 4.8 V (hot) depending on vehicle design
Fault condition: voltage stuck high (often >4.5 V) or pegged near battery voltage
Sensor type: usually an NTC thermistor — resistance falls as temperature rises
Typical thermistor resistance at 25°C often in the 2 kΩ–10 kΩ range (varies by sensor)

Diagnostic algorithm

Retrieve freeze frame and live data. Confirm code P1113 is current or stored and note IAT2 voltage/temperature.
Visually inspect IAT2 connector and wiring for corrosion, damage, or water. Repair as necessary.
With ignition ON (engine OFF) backprobe the IAT2 signal pin. A high voltage (~battery voltage or >4.5 V) indicates open circuit or short to VB+.
Disconnect the IAT2 sensor. Measure sensor resistance at ambient temperature and compare to expected NTC behavior. If open/very high resistance, replace the sensor.
Check continuity between the sensor connector and the ECM pin. Check for short to battery (measure between signal wire and VB+) and short to ground.
If wiring and sensor check OK, inspect reference/ground circuits at the ECM for proper connection and resistance to chassis ground.
Repair or replace damaged wiring, connectors, or sensor. Retest by clearing codes and performing a drive cycle.
If fault persists after replacing sensor and repairing wiring, consider ECM fault and consult manufacturer procedures for ECM testing/replacement.

Likely causes

Disconnected or corroded connector at IAT sensor 2
Broken wire or pinched harness causing an open circuit that pulls the signal high
Short to battery voltage on the sensor signal wire
Failed IAT sensor 2 element (thermistor out of range)
Intermittent ground or reference failure at the ECM

Fault status

⚠️ Status

Intake Air Temperature Sensor 2 circuit high input detected. Signal voltage above expected threshold — possible open circuit or short to battery voltage; MIL set.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

Repair manuals

Manual library for LAND ROVER

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Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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P1113 — Intake Air Temperature Sensor 2 high input