Single OBD II Codes
P1031
Codes for DTC Error Code P1031
| Make | DTC Error Code Meaning |
| *Buick | Heated Oxygen Sensor (HO2S) Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1 |
| *Cadillac | Heated Oxygen Sensor (HO2S) Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1 |
| *Chevrolet | Heated Oxygen Sensor (HO2S) Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1 |
| *GMC | Heated Oxygen Sensor (HO2S) Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1 |
| *Mercedes | Oxygen Sensors Reversed |
| *Oldsmobile | Heated Oxygen Sensor (HO2S) Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1 |
| *Pontiac | Heated Oxygen Sensor (HO2S) Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1 |
| *Saab | Injector Cylinder 3 Shorting To Ground |
| *Saturn | Heated Oxygen Sensor (HO2S) Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1 |
| *Toyota | A/F Sensor Heater Circuit Low (Bank 1 Sensor 1) |
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