What causes fault code P0114?

• Most likely: Loose connection or corrosion in the IAT sensor connector • Likely: Faulty IAT sensor (internal thermal expansion/vibration failure) • Possible: Damaged wiring harness (chafed insulation or intermittent short to ground) • Rare: Faulty Mass Air Flow (MAF) sensor (if IAT is integrated) • Rare: Internal ECM hardware failure

How do you fix fault code P0114?

STEP 1: Visually inspect the IAT sensor connector (often part of the MAF sensor). Look for corrosion, pushed-out pins, or frayed wires. Clean with electronic cleaner. STEP 2: Use a scan tool to monitor live data for IAT. Perform a 'wiggle test' on the harness and sensor; if the temperature readings spike erratically, the fault is local. STEP 3: Check sensor resistance with a Multimeter. Typically around 2-3k Ohms at 20°C (check service manual). Ensure 5V reference and ground are stable. STEP 4: If wiring and reference voltage are confirmed good but the signal remains erratic, replace the IAT/MAF sensor. STEP 5: Clear trouble codes and perform a road test to confirm the fix.

Powertrain (Engine & Gearbox)Standard EOBD

P0114 - Intake Air Temperature Sensor 1 Circuit Intermittent (Bank 1)

Q: What are the symptoms of fault code P0114?

• Check Engine Light (MIL) illuminated • Engine hesitation during acceleration • Rough idling or stalling • Increased fuel consumption • Difficulty starting the vehicle (especially when cold) • Intermittent loss of power

Last updated:1 February 2026

Related:IAT-sensor, MAF-sensor, ECU / PCM, Kabelstam / Ledningsnett

System

Powertrain (Engine & Gearbox)

Related Fault Codes

P0100

Mass or Volume Air Flow A Circuit Malfunction

P0101

Mass or Volume Air Flow Circuit Range/Performance Problem

P0102

Mass Air Flow (MAF) Circuit Low Input

P0103

Mass or Volume Air Flow Circuit High Input

Technical Description

P0114 is stored when the Engine Control Module (ECM) detects an erratic or intermittent signal voltage from the Intake Air Temperature (IAT) sensor. The IAT is a Negative Temperature Coefficient (NTC) thermistor where resistance decreases as temperature increases. The ECM provides a 5V reference; if the return signal shows sudden jumps or drops that are physically impossible in a short timeframe, the circuit is flagged as intermittent. This affects the calculation of air density, which is crucial for fuel injection pulse width and ignition timing calibration.

Possible Causes

Loose connection or corrosion in the IAT sensor connector

Faulty IAT sensor (internal thermal expansion/vibration failure)

Damaged wiring harness (chafed insulation or intermittent short to ground)

Faulty Mass Air Flow (MAF) sensor (if IAT is integrated)

Internal ECM hardware failure

Symptoms

Check Engine Light (MIL) illuminated

Engine hesitation during acceleration

Rough idling or stalling

Increased fuel consumption

Difficulty starting the vehicle (especially when cold)

Intermittent loss of power

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P0114 - Intake Air Temperature Sensor 1 Circuit Intermittent (Bank 1)

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P0114 - Intake Air Temperature Sensor 1 Circuit Intermittent (Bank 1)

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Technical Description

Possible Causes

Symptoms

Recommended Solution

Workflow

Mechanic's Tip

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