× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0131 Diagnostic Trouble Code Discussion for October 2009

Air Fuel Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift)

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0131
Help Request Posted
2000 Chevrolet Venture 3.4L MIL Lamp on VIN: 1GNDX03E7Y
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. came in for mil light at idle and normal cruise the sensors work fine when you go into wide open throtle or heavy accell the voltage of both sensores drops to 50-60mv i did find that fuel pressure is about 10 psi higher than spec would this cause that and any ...
October 12, 2009
2001 Chevrolet S10 4.3L Surge, Cuts out, MIL Lamp on VIN: 1GCCS19W11
P0131: Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage. Hey All: This one has me stumped. Truck will start and idle fairly good. When accelerating under load (hills or passing or trying to get speed up ) it falls on its face and will stay running (barely) but NO POWER at all. Feels like a potatoe shoved in the tail...
October 20, 2009