P0120Wysoki
Obwód czujnika pozycji przepustnicy (TPS) — usterka
Układ napędowy
Sprawdź szczegóły →P1220
WysokiThrottle Control System Malfunction (Throttle Position Sensor 2 or Engine Controller). Manufacturer code — meaning depends on the vehicle make (GM, Fiat, Isuzu).
OBD-II (EN): Throttle Control System Malfunction (TPS 2 or ECU)
Code P1220 signals a problem with the throttle control system or its position sensor — its exact meaning depends on the vehicle manufacturer (e.g., GM, Fiat, Isuzu). It manifests as difficult starting, jerking, and power loss. Due to the complexity of the diagnosis and the possibility of a faulty engine controller, a visit to a qualified diagnostician is recommended.
Symptoms
Difficulty starting the engine, stalling while driving, misfires, noticeable power loss, jerking during acceleration, increased fuel consumption, steady Check Engine Light (MIL).
Possible causes
• Faulty throttle position sensor (TPS 2) or its electrical circuit • Defective engine control unit (ECU) — especially Magneti Marelli units in Fiat vehicles • Damage or contamination of the throttle body • Open or short circuit in the wiring harness supplying the sensor or throttle actuator • Worn or faulty electrical connectors in the engine control system circuit
Affected systems
Układ sterowania silnikiem (ECM/ECU)Układ sterowania przepustnicą (throttle control)Czujnik położenia przepustnicy (TPS)Układ zasilania paliwemUkład zapłonowy
Related codes
P0638Wysoki
Sterowanie przepustnicą — zakres/sprawność (VAG EPC)
Układ napędowy
Sprawdź szczegóły →Does code P1220 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.