P0170
Fuel Trim Bank 1
P0170 is an OBD-II diagnostic trouble code meaning: Fuel Trim Bank 1. Common causes: air leaks in the intake tract, malfunction of the mass air flow sensor (mass air flow sensor). Estimated repair cost: $56–167.
Symptoms
- Unstable engine idling
- Increased fuel consumption
- Power Loss
- Jerking during acceleration
Causes
- Air leaks in the intake tract
- Malfunction of the mass air flow sensor (mass air flow sensor)
- Dirty or faulty fuel injectors
- Problems with the oxygen sensor
- Fuel pump malfunction
- Clogged fuel filter
- EVAP system malfunction
How to Fix
- Check the tightness of the intake tract for air leaks
- Diagnose mass air flow sensor and oxygen sensors
- Check fuel pressure and condition of the fuel pump
- Clean or replace fuel injectors
- Check the EVAP system for malfunctions
Related codes
Error P0170 by Vehicle Brand
FAQ
What does the P0170 code mean?
P0170 is an OBD-II diagnostic trouble code that indicates: Fuel Trim Bank 1
What causes a P0170 error code?
The most common causes of P0170 include: Air leaks in the intake tract; Malfunction of the mass air flow sensor (mass air flow sensor); Dirty or faulty fuel injectors; Problems with the oxygen sensor.
How do I fix a P0170 diagnostic trouble code?
To fix P0170: Check the tightness of the intake tract for air leaks. Diagnose mass air flow sensor and oxygen sensors. Check fuel pressure and condition of the fuel pump. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0170?
Limited driving only, diagnose soon
How much does it cost to fix P0170?
The estimated repair cost for P0170 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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