P0120Wysoki
Obwód czujnika pozycji przepustnicy (TPS) — usterka
Układ napędowy
Sprawdź szczegóły →P1120
WysokiThrottle Position Sensor Out of Range or Accelerator Pedal Position Sensor Signal Incorrect (Circuit 1). Manufacturer code indicating a discrepancy between the requested and actual throttle position.
OBD-II (EN): Throttle Position Sensor/Accelerator Pedal Position Sensor Circuit 1 Range/Performance
Code P1120 indicates a problem with the throttle position sensor (TPS) or the accelerator pedal position sensor – the engine control module detected a signal outside the allowable range. This can lead to power limitation, unstable engine operation, or limp mode. Causes vary depending on the vehicle manufacturer, so professional scanner diagnosis is recommended.
Symptoms
Check Engine Light (MIL) illumination Engine power limitation or entering limp mode Rough engine operation or running on reduced cylinders (noted in Opel: running on 3 cylinders) Problems with acceleration – delayed or no response to gas pedal Unstable idle speed Possible jerking while driving
Possible causes
Faulty or worn throttle position sensor (TPS) Faulty accelerator pedal position sensor (APP Sensor 1) Open or short circuit in the sensor wiring harness Corrosion or damage to the sensor electrical connector Faulty engine control module (PCM/ECU) – especially in Opel vehicles Incorrect sensor power supply or ground voltage Mechanical damage to the throttle body (dirt, sticking)
Affected systems
Układ zarządzania silnikiemCzujnik położenia przepustnicy (TPS)Czujnik pedału przyspieszenia (APP)Moduł sterowania napędem (PCM/ECU)Przepustnica (Throttle Body)
Related codes
P2135Wysoki
Czujnik pozycji przepustnicy/pedalu — korelacja napięcia (VAG)
Układ napędowy
Sprawdź szczegóły →Code P1120 appears in these brands
Go to messages and symptoms for your brand — there we analyze this code together with other typical alerts.
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Sources and further reading
Does code P1120 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.