Join Now
International Automotive Technicians Network

P1131 Diagnostic Trouble Code Discussion for November 2006

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
2002 Nissan Sentra CA 1.8L MIL Lamp on VIN: 3N1CB51D92
P1131: undocumented. This vehicle came in with 2 undocumented fault codes (1131 and 1165) along with 2 oxygen sensor fault codes. We replaced all 4 oxygen sensors new from Nissan. Cleared all fault coeds from memory. Check engine light returned immediately. The oxygen sensor fault...
November 06, 2006
2000 Mercury Sable GS 3.0L Surge, MIL Lamp on VIN: 1MEFM58U3Y
P1131: ho2s 1 1 sensor lean. car came in with ses light on and some other unrelated complaints found large list of codes indicating fuel system wasn,t working well running system lean fuel pressure test came back with koeo 28 psi and koer about 8 psi so not even close to pressure spec. we...
November 08, 2006
2000 Mercury Sable GS 3.0L Surge, MIL Lamp on VIN: 1MEFM58U3Y
P1131: ho2s 1 1 sensor lean. car came in with ses light on and some other unrelated complaints found large list of codes indicating fuel system wasn,t working well running system lean fuel pressure test came back with koeo 28 psi and koer about 8 psi so not even close to pressure spec. we...
November 09, 2006
2002 Nissan Sentra CA 1.8L MIL Lamp on VIN: 3N1CB51D92
P1131: undocumented. This vehicle came in with 2 undocumented fault codes (1131 and 1165) along with 2 oxygen sensor fault codes. We replaced all 4 oxygen sensors new from Nissan. Cleared all fault coeds from memory. Check engine light returned immediately. The oxygen sensor fault...
November 06, 2006
2000 Mercury Sable GS 3.0L Surge, MIL Lamp on VIN: 1MEFM58U3Y
P1131: ho2s 1 1 sensor lean. car came in with ses light on and some other unrelated complaints found large list of codes indicating fuel system wasn,t working well running system lean fuel pressure test came back with koeo 28 psi and koer about 8 psi so not even close to pressure spec. we...
November 08, 2006
2000 Mercury Sable GS 3.0L Surge, MIL Lamp on VIN: 1MEFM58U3Y
P1131: ho2s 1 1 sensor lean. car came in with ses light on and some other unrelated complaints found large list of codes indicating fuel system wasn,t working well running system lean fuel pressure test came back with koeo 28 psi and koer about 8 psi so not even close to pressure spec. we...
November 09, 2006