P0156 Code – O2 Sensor Circuit Malfunction
The P0156 diagnostic trouble code indicates that the Engine Control Unit (ECU) has detected a malfunction in the oxygen (O2) sensor circuit on Bank 2 Sensor 2. This sensor is…
P0155 Code – O2 Sensor Heater Circuit Malfunction
The P0155 diagnostic trouble code indicates that the Engine Control Unit (ECU) has detected a malfunction in the heater circuit of the oxygen (O2) sensor on Bank 2 Sensor 1.…
P0139 Code – O2 Sensor Circuit Slow Response
The P0139 diagnostic trouble code indicates that the Engine Control Unit (ECU) has detected a slow response from the oxygen (O2) sensor located on Bank 1 Sensor 2. This sensor…
P0133 Code – O2 Sensor Circuit Slow Response
The P0133 diagnostic trouble code indicates that the Engine Control Unit (ECU) has detected a slow response from the oxygen (O2) sensor located on Bank 1 Sensor 1. This sensor…
P0131 Code – O2 Sensor Circuit Low Voltage
The P0131 diagnostic trouble code (DTC) indicates that the Engine Control Unit (ECU) has detected a low voltage signal from the oxygen (O2) sensor located on Bank 1, Sensor 1.…
P0129 Code – Barometric Pressure Too Low
The P0129 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected that the barometric pressure reading is lower than the expected range. The Barometric Pressure Sensor…
P0127 Code – Intake Air Temperature Too High
The P0127 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected that the intake air temperature (IAT) is higher than the acceptable operating range. The Intake…
P0126 Code – Insufficient Coolant Temperature
The P0126 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has determined that the engine coolant temperature is too low for stable engine operation. This means the…
P0125 Code – Insufficient Coolant Temperature
The P0125 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has determined that the engine coolant temperature is too low for the engine to enter closed loop…
P0119 Code – Engine Coolant Temp Intermittent
The P0119 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected an intermittent or erratic signal from the Engine Coolant Temperature (ECT) sensor. The ECT sensor…
