The Lemon IndexThe upstream O2 sensor reads too low.
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
Failed O2 sensor. Then: exhaust leak; wiring fault.
Owners named P0131 in 13 complaints to the U.S. government, most often on the Ford Fusion.
Cars owners report it on
Complaints that name P0131, by model. Raw counts, not a failure rate: popular models get more complaints.
Years owners report it on most: 2016 Ford Fusion
The details
What P0131 means
The upstream O2 sensor reads too low.
Can I drive with P0131?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
31% of the owner complaints that name P0131 also say the car stalls or shuts off. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0131
- Failed O2 sensor
- Exhaust leak
- Wiring fault
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Stalls or shuts off: 31% of complaints
- Transmission slips or shifts hard: 31% of complaints
- Shakes, runs rough or misfires: 23% of complaints
- Loses power or goes into limp mode: 23% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P0131 most
2016 Ford Fusion (2).
Related codes
P0133 P0135 P0136 P0137 P0138 P0128 P0126 P0123
Quick answers
What does P0131 mean?
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1). The upstream O2 sensor reads too low.
Can I drive with P0131?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
What causes P0131?
Failed O2 sensor; Exhaust leak; Wiring fault.
Counts: NHTSA owner complaints whose text names P0131. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.