Nov 24, 2024 · If the ECU detects that the actual oxygen signal wire in Bank 1, Sensor 1 is registering a low Voltage below 400 milli Volts for more than 20 seconds, it will trigger the P0131 code.

May 29, 2024 · Diagnostic trouble code (DTC) P0131 stands for “O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1).” It indicates that the voltage of the affected oxygen sensor stayed below a certain …

Sep 10, 2024 · Begin by diagnosing the issue with a scan tool to verify the P0131 code and confirm the sensor's low voltage signal. Inspect the wiring and connectors for any damage or corrosion. Repair …

What does the P0131 – O2 Sensor Circuit Low Voltage mean? The P0131 code indicates a problem with the oxygen sensor circuit, specifically relating to low voltage.

Sep 22, 2025 · Learn what the P0131 O2 sensor low voltage code means, common causes, symptoms, and proven repairs to restore engine performance and fuel economy.

Essentially the same as P0136 and P0137, a P0131 code refers to the first oxygen sensor on Bank 1. P0131 means the O2 oxygen sensor's voltage remained low for longer than 2 minutes.

Dec 13, 2024 · Diagnosing the P0131 error involves the following steps: Scan for codes: Use an OBD-II scanner to confirm the P0131 code and check for related codes. Inspect the oxygen sensor: Check for...

Jan 21, 2025 · DTC P0131 is triggered when the Bank 1 Sensor 1 oxygen sensor has a voltage below the normal range (0.1 to 0.9 volts). A bad O2 sensor is usually to blame, but wiring, exhaust, fuel …

Mar 3, 2025 · The P0131 code indicates a low voltage signal from the O2 sensor circuit on Bank 1 Sensor 1, triggering the Check Engine Light. A faulty O2 sensor, wiring issues, or exhaust leaks are …

Sep 15, 2025 · Learn all about the P0131 code, what causes low voltage in the O2 sensor circuit, and how to diagnose and fix common issues to maintain optimal engine performance.