The P014C is a generic OBD-II powertrain trouble code. Its official SAE definition is “O2 Sensor Slow Response – Rich to Lean (Bank 1, Sensor 1)”.
The P014B is a generic OBD-II powertrain trouble code. Its official definition is “O2 Sensor Slow Response – Lean to Rich (Bank 1, Sensor 2)“.
The P014A is a generic OBD-II powertrain trouble code. Its official definition is “O2 Sensor Slow Response – Rich to Lean (Bank 1, Sensor 2)”.
The P0149 is a generic OBD-II powertrain trouble code. Its official definition is “Fuel Timing Error”.
The P0148 is a generic OBD-II powertrain trouble code. Its official definition is “Fuel Delivery Error”.
The P0147 is a generic OBD-II powertrain trouble code. Its official definition is “O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 3)”.
The P0146 is a generic OBD-II powertrain trouble code. Its official definition is “O2 Sensor Circuit No Activity Detected (Bank 2, Sensor 3)”.
The P0145 is a generic OBD-II powertrain trouble code. Its official definition is “O2 Sensor Circuit High Voltage (Bank 2, Sensor 3)”. This diagnostic trouble code is stored by the vehicle’s Engine Control Module (ECM) when it detects that the signal voltage from a specific oxygen sensor is consistently reading above the normal, expected range. The designation is critical: “Bank 2” refers to the side of the engine opposite the one containing cylinder number 1. “Sensor 3” indicates this is an additional sensor beyond the standard upstream (Sensor 1) and primary downstream (Sensor 2) sensors. Its function and location are vehicle-specific; it is often a secondary monitoring sensor in a complex exhaust system, perhaps after an additional catalytic converter.