DTC P0138 – O2 Sensor Circuit High Voltage (Bank 1 Sensor 2). 🔧 DTC P0138 – O2 Sensor Circuit High Voltage (Bank…

DTC P013700 – O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2) Bank 1 Sensor 2 = Post-Cat Oxygen Sensor (after catalytic…

DTC P0136 – O₂ Sensor Circuit Malfunction (Bank 1 Sensor 2) Common Causes 1. Faulty O₂ Sensor (B1S2) – element worn out,…

DTC: O₂ Sensor Heater Circuit – Bank 1 Sensor 1 (Upstream) Malfunction FUNCTION The heater inside the O₂ sensor warms up the…

DTC P0134 – O₂ Sensor Circuit No Activity Detected (Bank 1 Sensor 1). This code means the upstream O₂ sensor (before the…

DTC P013300 – O2 Sensor Circuit Bank 1 Sensor 1 Slow Response. ✅ What P013300 Means Bank 1 Sensor 1 (Upstream O₂…