Jan 7, 2023 · When your car's check engine light comes on and you see the code P0138, don't panic! This article will help you understand what it is and how to fix it.

Aug 30, 2024 · The P0138 diagnostic trouble code indicates that the O2 sensor circuit for bank 1 sensor 2 is registering a high voltage condition. Common causes include Faulty O2 sensor, Wiring or …

Dec 19, 2024 · What does the P0138 Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 2) mean? P0138 code gets triggered when the Engine Control Module detects that the voltage from the oxygen …

Feb 9, 2024 · Learn what a P0138 code means and the most likely cause and fix. In most cases, it's the sign of a bad downstream oxygen sensor.

Jun 27, 2026 · The P0138 code indicates a high voltage condition in the O2 sensor circuit for bank 1 sensor 2, leading to a rich air-fuel mixture. Common causes of the P0138 code include sensor …

The P0138 code indicates high voltage in the O2 sensor circuit. Learn its causes, symptoms, and fixes to keep your vehicle running smoothly.

Sep 15, 2025 · Learn what the P0138 code means, Bank 1 Sensor 2’s location, common causes, and how to diagnose and fix this high-voltage O2 sensor issue.

Description of vehicle trouble code P0138 - Oxygen Sensor Circuit High Voltage (Bank1, Sensor2)

Feb 11, 2026 · Is your vehicle triggering a P0138 trouble code on your OBD-II scanner? If so, read on to find out what this code means, what the symptoms and possible causes are, and how you can …

6 days ago · The P0138 code means the Powertrain Control Module (PCM) detects a sustained high voltage signal from the downstream oxygen sensor (Bank 1, Sensor 2). This sensor sits after the …