P0116: Engine Coolant Temperature (ECT) Circuit Range / Performance

P0116 means the engine coolant temperature (ECT) sensor signal is in range but implausible, so the ECU sees a performance or rationality problem. The reading might warm up too slowly, stay too low, or disagree with the intake air temperature at startup. A stuck-open thermostat, a lazy sensor, or low coolant are the usual culprits. Repair typically costs 40 to 220 EUR depending on whether the sensor or the thermostat is at fault.

P0116 è un codice diagnostico di guasto relativo a sistema di raffreddamento, classificato con gravità moderate. Quando la centralina (ECU) del tuo veicolo rileva questa condizione, memorizza P0116 e accende la spia motore.

Se il tuo veicolo ha attivato P0116, potresti notare uno o più di questi sintomi:

• Check engine light illuminated
• Engine takes too long to reach operating temperature
• Temperature gauge reads low or rises very slowly
• Poor fuel economy and rough cold-running
• Heater blowing lukewarm air in cold weather
• Cooling fan cycling at unexpected times

Ecco le cause più comuni di P0116, ordinate in base alla probabilità che siano la causa del problema:

In genere sì, per brevi tragitti. Usually safe to drive short distances. P0116 means the coolant temperature reading is electrically valid but does not match what the ECU expects, for example warming up too slowly or not tracking other sensors. Fuelling and the cooling fan may behave oddly, hurting economy. Because the reading is questionable, treat the temperature gauge with caution and address the fault promptly so you keep an accurate overheating warning.

Segui questi passaggi per individuare la causa principale di P0116:

1. Watch the live coolant temperature PID with Skanyx from a cold start. A healthy engine climbs steadily to roughly 85 to 95 C and stays there; if it stalls around 60 to 75 C and the heater is lukewarm, suspect a stuck-open thermostat
2. At key-on after the engine has sat overnight, compare the live coolant temperature against the live intake air temperature. They should read within a few degrees of each other on a cold engine
3. If the coolant reading is implausibly low or lags far behind reality, the sensor may be drifting even though it is electrically in range
4. Check the coolant level and bleed any air pockets, since a partly exposed sensor tip reads low
5. If the thermostat opens too early, replace it and clear the code, then re-watch the warm-up curve to confirm the fix
6. Compare the sensor resistance against the manufacturer table at a known temperature to confirm whether the sensor or the thermostat is at fault

I costi di riparazione di P0116 variano a seconda della causa principale e del tuo veicolo. Ecco le stime tipiche:

P0116 si comporta in modo diverso a seconda del tuo veicolo. Seleziona la tua auto qui sotto per cause specifiche del modello, problemi noti e stime dei costi adeguate:

Questi codici compaiono spesso insieme a P0116 o indicano problemi correlati: