Fault code P0114 – a step-by-step guide to diagnosing and fixing it

Error code P0114 is displayed and the check engine light is on - what does this mean?

The OBD/EOBD system has detected a fault in the intake air temperature (IAT) sensor circuit that is outside the normal operating range. This DTC P0114 indicates intermittent or implausible signals from the air temperature sensor, which can affect engine management.

What can cause this error code?

• Defective intake air temperature sensor (IAT)
• Damaged or corroded wiring to the IAT sensor
• Loose or dirty plug connections
• Short circuit in the sensor cable
• Interruption in the ground cable
• Defective engine control unit (rare)
• Dirty or clogged mass air flow sensor
• Faulty power supply to the sensor

What symptoms occur in parallel with fault code P0114?

• Engine performance: Reduced performance and uneven engine running
• Fuel consumption: Increased consumption due to incorrect mixture formation
• Starting problems: Difficult cold starts or prolonged warm-up phases
• Idling: Irregular or fluctuating idling
• Exhaust emissions: Increased pollutant values during the emissions test
• Check engine light: Permanent or intermittent activation of the MIL

How can the problem with error code P0114 be rectified?

• The repair requires a systematic diagnosis to identify the exact cause.
• Replacement of the defective intake air temperature sensor with an original part or a spare part of equivalent quality
• Repair or replacement of the damaged wiring between the sensor and engine control unit, including professional insulation
• Cleaning and treatment of corroded plug connections with contact spray and subsequent sealing
• Elimination of short circuits by replacing the affected cable sections and checking the cable routing
• Restoring the ground connection by cleaning the contact points and firmly connecting the ground cable
• Professional diagnosis and, if necessary, replacement of the engine control unit in the event of a proven ECU malfunction