What does OBD2 code P0170 mean?+
P0170 stands for Fuel Trim Malfunction Bank 1. The fuel trim (fuel correction) on Bank 1 is outside acceptable limits.
What causes code P0170?+
Vacuum leak; Faulty MAF sensor; Failing oxygen sensor; Fuel pressure issue; Dirty fuel injectors
How do I fix code P0170?+
Smoke test for vacuum leaks; Clean or replace MAF sensor; Check fuel pressure; Clean fuel injectors; Replace upstream O2 sensor
How much does it cost to fix P0170?+
Estimated repair cost for P0170 is $50–$400.
Is P0170 DIY-friendly?+
Yes — P0170 is generally DIY-friendly with basic tools.