P1130 on Toyota
Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction, Bank 1 Sensor 1
P1130 on Toyota vehicles indicates air/fuel ratio sensor circuit range/performance malfunction, bank 1 sensor 1. Au7o has documented this code across 1 Toyota model — most commonly on 4Runner. A Toyota/Lexus manufacturer-specific code. The engine control module has decided the upstream air/fuel ratio sensor (the wideband oxygen sensor ahead of the catalytic converter on the cylinder bank containing cylinder #1) is reporting a signal that does not make sense for current operating conditions. Because the ECM leans on this sensor to trim the fuel mixture, the car may idle rough, hesitate, and burn more fuel. Note that other manufacturers use P1130 for unrelated faults - Ford defines it as "Lack of HO2S Switch - Adaptive Fuel at Limit" (Bank 1), so the vehicle make matters here. Typical repair costs on Toyota range from $120 to $400, depending on the specific model and root cause.
Common Causes of P1130
- •Failed air/fuel ratio sensor, Bank 1 Sensor 1
- •Blown A/F sensor heater fuse or failed heater element
- •Damaged, melted, or chafed sensor wiring near the exhaust
- •Corroded or loose sensor connector
- •Exhaust or intake air leak upstream of the sensor skewing its reading
- •Fuel delivery or injector fault pushing the mixture outside the sensor's expected range
- •Failed ECM (rare - verify everything else first)
P1130 on Toyota by Model
Toyota 4Runner(1 issue)
- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 Failure (P0125 / P1130 / P0135) — Heater Circuit / Slow Response2000-2009
Later 3rd-gen and 4th-gen 4Runners use a wide-band Air-Fuel Ratio (A/F) sensor as the upstream (Bank 1 Sensor 1) oxygen sensor. With age and heat cycling the sensor's internal heater or element degrades, setting codes such as P0125 (insufficient coolant temp for closed loop / A-F feedback), P1130 (A-F sensor range/performance), or P0135 (heater circuit). Symptoms include poor fuel economy, hesitation, and a check engine light. It's a very common high-mileage sensor replacement and a frequent search topic.
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View P1130 across all makes →Frequently Asked Questions
What does P1130 mean on Toyota?▼
P1130 stands for "Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction, Bank 1 Sensor 1." A Toyota/Lexus manufacturer-specific code. The engine control module has decided the upstream air/fuel ratio sensor (the wideband oxygen sensor ahead of the catalytic converter on the cylinder bank containing cylinder #1) is reporting a signal that does not make sense for current operating conditions. Because the ECM leans on this sensor to trim the fuel mixture, the car may idle rough, hesitate, and burn more fuel. Note that other manufacturers use P1130 for unrelated faults - Ford defines it as "Lack of HO2S Switch - Adaptive Fuel at Limit" (Bank 1), so the vehicle make matters here. On Toyota specifically, this code is documented across 1 model.
What causes P1130 on Toyota vehicles?▼
Common causes on Toyota: Failed air/fuel ratio sensor, Bank 1 Sensor 1, Blown A/F sensor heater fuse or failed heater element, Damaged, melted, or chafed sensor wiring near the exhaust, Corroded or loose sensor connector, Exhaust or intake air leak upstream of the sensor skewing its reading. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1130 on a Toyota?▼
Repair costs on Toyota range from $120 to $400, depending on the specific model and root cause.
Which Toyota models have P1130 documented?▼
Au7o has documented P1130 on 1 Toyota model: 4Runner.