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The P1086 diagnostic trouble code indicates a problem with the fuel control mixture being too rich on bank 2 sensor 1 in the vehicle's engine. This code is usually related to the oxygen sensor located before the catal...
P1086 – JFET P-Channel 30 V 350 mW Through Hole TO-92-3 from onsemi. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
Jan 3, 2026 · When your vehicle’s onboard diagnostics (OBD-II) system flags a P1086 code, it indicates a problem with the fuel control mixture being too rich on bank 2 sensor 1 in the engine. This issue is usually rel...
Learn what Fuel Control Mixture Rich Bank 2 Sensor 1 means, location and how to repair.
Check sensor wiring for damage or corrosion, and ensure connectors are secure. A faulty sensor can cause incorrect fuel mixture, triggering the fault.
P1086 only indicates that the rail pressure is insufficient during cranking. It is mostly the result of a fuel system related issue for which another fuel system-related DTC is stored. Therefore always check if anothe...
After leaving the fuel station, the truck displayed a stop engine warning. I immediately pulled over and noticed smoke coming from under the hood, so I shut it down. He mentioned that it was operating and sounded fine...