P1131 Diagnostic Trouble Code Discussion for March 2020
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 | |
| 1999 Ford F-250 Super Duty Lariat 6.8L Poor Fuel Economy VIN: 1FTNW21S8X P1131: HO2S Bank 1 Sensor 1 Sensor Indicates Lean. Customer complaint is it lacks power and gets a couple miles to the gallon. I found bank 1 not contributing at all and I believe it is because the coil firing event is way off see picture. Also cylinder #1 there is no coil control from the PCM checked @ PC... |
March 02, 2020 |
