P1130 — Air-Fuel Ratio Sensor Circuit Range/Performance (Bank 1 Sensor 1)
CAUTIONIs it safe to drive? Drive gently and get it looked at soon — it can worsen or fail inspection.
What P1130 means
This is a manufacturer-specific code — its meaning depends on the vehicle’s make (see below).
What P1130 means on specific makes
Toyota / Lexus / Scion CAUTION
The A/F sensor's signal is present but out of the expected range or drifting, so fuel trim accuracy suffers. Often precedes or accompanies the heater codes on the same sensor.
- Aging/contaminated A/F sensor ($120-300)
- Exhaust leak upstream of the sensor
- Vacuum/intake leak skewing readings
- Wiring/connector issue
Check first: Watch the A/F sensor live data against fuel trims; a lazy or pegged signal points to the sensor. Rule out exhaust and intake leaks first.
Source: troublecodes.net/toyota, toyotaspace.com/toyota-obd2-codes-list