P0131 on the 2024 Acura Integra
Your 2024 Acura Integra has triggered code P0131, indicating the Bank 1 Sensor 1 air-fuel ratio sensor is outputting below-threshold voltage. The 2024 Integra uses the 1.5L turbocharged four-cylinder (L15CA) producing 200 hp with the CVT or the updated Type S with the 2.0L turbo (K20C1) producing 320 hp. On both inline-four engines, there's one bank. Bank 1 Sensor 1 is the upstream wideband A/F sensor.
Symptoms
- Check engine light on
- Reduced fuel economy
- Minor idle roughness
- Subtle hesitation on acceleration
- Type S may feel slightly less responsive
Causes
1. Defective A/F Sensor
On a 2024 model, a factory-defective sensor is the most likely cause. The 1.5T and 2.0T engines both produce high exhaust temperatures downstream of the turbo, where the A/F sensor resides. Manufacturing variations in the Denso sensor's pumping cell can cause early failure. The Type S's higher-output 2.0T runs even hotter, increasing sensor stress.
2. Assembly Wiring Issue
Connector not fully engaged, harness pinched near a bracket, or improper routing near the turbo can cause signal problems. These are assembly-related defects on a new vehicle.
3. Exhaust Leak
A gasket issue at the turbo outlet or downpipe connection can introduce air past the sensor. The Integra's integrated exhaust manifold-turbo design means any leak in this area affects the A/F sensor reading.
4. Software Calibration
ECM software updates may be available to refine A/F sensor monitoring. Acura dealers can check for applicable TSBs using HDS.
What to Do
- Schedule an Acura dealer appointment — warranty covers this repair.
- Ask about TSBs specific to P0131 on the Integra.
- Avoid DIY repairs that could affect warranty coverage.
Repair Costs
Fully covered under the 4-year/50,000-mile basic warranty and 8-year/80,000-mile emissions warranty. Out of pocket: $180–$450 depending on the engine variant.
Summary
Take it to the dealer for a free warranty repair. P0131 is a minor sensor issue that doesn't indicate broader reliability concerns with the Integra platform.