Join Now
International Automotive Technicians Network

P1131 Diagnostic Trouble Code Discussion for September 2007

Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean


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 P1131
Help Request Posted
1998 Mercury Mystique GS 2.0L Hesitation, Surge, MIL Lamp on VIN: 1MEFM6530W
P1131: Lack of 02 switches. Once again, the blue oval has kicked me in the teeth. This car has a seriously lean condition, verifyed by 3 codes (listed) and also confirmed by the performance and low 02 volts. Road tested with fuel pressure guage visible on windsheild and found pressure we...
September 05, 2007
1998 Mercury Mystique GS 2.0L Hesitation, Surge, MIL Lamp on VIN: 1MEFM6530W
P1131: Lack of 02 switches. Once again, the blue oval has kicked me in the teeth. This car has a seriously lean condition, verifyed by 3 codes (listed) and also confirmed by the performance and low 02 volts. Road tested with fuel pressure guage visible on windsheild and found pressure we...
September 05, 2007