P0148 Code – Fuel Delivery Error
The P0148 diagnostic trouble code (DTC) indicates that the Engine Control Unit (ECU) has detected a fuel delivery error. This code is most commonly found in diesel engines, where the…
P0147 Code – O2 Sensor Heater Circuit Malfunction
The P0147 diagnostic trouble code (DTC) indicates a malfunction in the oxygen sensor heater circuit for Bank 1 Sensor 3. Some vehicles use three oxygen sensors on the same bank…
P0138 Code – O2 Sensor Circuit High Voltage
The P0138 diagnostic trouble code (DTC) indicates that the Engine Control Unit (ECU) has detected a high voltage signal from the oxygen sensor on Bank 1 Sensor 2. This sensor…
P0137 Code – O2 Sensor Circuit Low Voltage
The P0137 diagnostic trouble code (DTC) indicates that the Engine Control Unit (ECU) has detected a low voltage signal from the oxygen sensor on Bank 1 Sensor 2. The downstream…
P0136 Code – O2 Sensor Circuit Malfunction
The P0136 diagnostic trouble code (DTC) indicates a malfunction in the oxygen sensor circuit for Bank 1 Sensor 2. The downstream oxygen sensor (Sensor 2) is located after the catalytic…