Hybspec

P1110

Średni

Intake Air Temperature Sensor Circuit Fault – Intermittent High Voltage Signal (Bank 1). The code indicates a malfunction of the variable valve timing control solenoid or the IAT sensor depending on the vehicle manufacturer.

OBD-II (EN): Intake Air Temperature Sensor Circuit High Intermittent (Bank 1)

Code P1110 is a manufacturer-specific code that can indicate a fault in the intake air temperature sensor (IAT) circuit or problems with the variable valve timing control solenoid (VTC/VVT). Symptoms include weakened engine power, increased fuel consumption, and irregular engine operation. Due to the varying meaning of the code depending on the vehicle make, professional computer diagnosis is recommended.

Symptoms

Check Engine Light on the dashboard Weakened engine dynamics and power Increased fuel consumption Rough engine operation or jerking during acceleration Possible difficulty starting the engine Worsened throttle response

Possible causes

Faulty or contaminated intake air temperature (IAT) sensor Problems with IAT sensor wiring – open circuit, short circuit, or connector corrosion Faulty variable valve timing control solenoid (VTC/VVT) – mainly for Nissan and Honda Low level or contamination of engine oil (affects VTC) Faulty ECM/PCM controller Clogged oil filter or incorrect oil pressure Damaged or loose electrical connector near the air filter or intake manifold

Affected systems

Układ dolotowy powietrzaCzujnik temperatury powietrza dolotowego (IAT)Układ zmiennych faz rozrządu (VTC/VVT)Układ zarządzania silnikiem (ECM/PCM)Układ smarowania (ciśnienie oleju)

Related codes

Does code P1110 require professional diagnostics?

The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.