P0170 means the fuel trim values on bank 1 have exceeded the normal correction range. The ECU can no longer properly compensate for a rich or lean condition by adjusting fuel delivery. This indicates a persistent air-fuel mixture problem that needs investigation.
P0170 means the fuel trim values on bank 1 have exceeded the normal correction range. The ECU can no longer properly compensate for a rich or lean condition by adjusting fuel delivery. This indicates a persistent air-fuel mixture problem that needs investigation.
P0170 è un codice diagnostico di guasto relativo a sistema di alimentazione, classificato con gravità moderate. Quando la centralina (ECU) del tuo veicolo rileva questa condizione, memorizza P0170 e accende la spia motore.
Se il tuo veicolo ha attivato P0170, potresti notare uno o più di questi sintomi:
Ecco le cause più comuni di P0170, ordinate in base alla probabilità che siano la causa del problema:
In genere sì, per brevi tragitti. You can drive to a workshop but expect reduced fuel economy and possible rough running. If accompanied by misfires or strong exhaust smell, limit driving.
Segui questi passaggi per individuare la causa principale di P0170:
I costi di riparazione di P0170 variano a seconda della causa principale e del tuo veicolo. Ecco le stime tipiche:
Prezzi stimati al March 2026. I costi variano in base alla regione, al veicolo e all'officina.
P0170 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:
2007-2024
The M271 and M274 engines can develop intake manifold swirl flap issues that cause vacuum leaks and trigger P0170. The M274 2.0T is also sensitive to MAF sensor contamination. Mercedes recommends checking the crankcase ventilation system during diagnosis.
Costi stimati per i proprietari di Mercedes C-Classadeguato al rialzo rispetto alla media a causa dei prezzi dei ricambi specifici Mercedes-Benz
Prezzi stimati al March 2026. I costi variano in base alla regione, al veicolo e all'officina.
2004-2024
The 1.6L Z16XER and A16XER engines are prone to intake manifold gasket leaks that cause P0170. A common symptom is a whistling noise from the intake area at idle. The PCV system can also contribute to lean fuel trims on higher-mileage engines.
Costi stimati per i proprietari di Opel Astraadeguato al ribasso rispetto alla media a causa dei prezzi dei ricambi specifici Opel
Prezzi stimati al March 2026. I costi variano in base alla regione, al veicolo e all'officina.
2005-2024
The 1.6 Ti-VCT and 2.0 GDI petrol engines can trigger P0170 from vacuum leaks at the intake manifold or PCV hoses. The 1.0 EcoBoost is sensitive to MAF sensor contamination from aftermarket air filters. Always use a genuine or high-quality replacement MAF.
Questi codici compaiono spesso insieme a P0170 o indicano problemi correlati:
P0170 means the engine computer has detected that its fuel mixture corrections on bank 1 have gone beyond the normal operating range. The system tries to maintain the ideal 14.7:1 air-fuel ratio by adjusting fuel delivery, but something is preventing it from doing so.
P0170 indicates a general fuel trim malfunction - the trims are out of range in either direction. P0171 specifically means the system is too lean (too much air or too little fuel). P0170 is a broader code that can indicate either lean or rich conditions.
Yes. A contaminated MAF sensor underreports the amount of air entering the engine, causing the ECU to deliver too little fuel. The O2 sensor detects the resulting lean condition and the fuel trims increase to compensate, eventually triggering P0170.
Use an OBD2 scan tool to view Short Term Fuel Trim (STFT) and Long Term Fuel Trim (LTFT). Values near 0% are ideal. Positive values mean the ECU is adding fuel (lean correction). Negative values mean it is removing fuel (rich correction). Beyond +/- 10% warrants investigation.
Collega un adattatore OBD2 Bluetooth standard, esegui la scansione dei codici e ottieni una diagnosi basata sull'IA con livelli di gravità e stime dei costi di riparazione.
Scarica Skanyx