DTC P0031, P0032, P101D; Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) [11/2013 - 08/2014]: Description
Refer to DTC P2195.
Refer to DESCRIPTION
HINT:
- When any of these DTCs is stored, the ECM enters fail-safe mode. The ECM turns off the air fuel ratio sensor heater in fail-safe mode. Fail-safe mode continues until the ignition switch is turned off.
- Although the DTC titles say oxygen sensor, these DTCs relate to the air fuel ratio sensor.
- Sensor 1 refers to the sensor mounted in front of the three-way catalytic converter and located near the engine assembly.
- The ECM has a pulse width modulated control circuit to adjust the current through the heater. The air fuel ratio sensor heater circuit uses a relay on the +B side of the circuit.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P0031 | Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) | Air fuel ratio sensor heater current is less than 0.8 A, even when the air fuel ratio sensor heater duty cycle is 30% or higher (1 trip detection logic). |
|
Comes on | DTC stored | DTC for Mexico Models - Applies |
| P0032 | Oxygen (A/F) Sensor Heater Control Circuit High (Bank 1 Sensor 1) | Air fuel ratio sensor heater current reaches the high limit (Heater monitor IC high current limiter monitor input "Fail") (1 trip detection logic). |
|
Comes on | DTC stored | DTC for Mexico Models - Applies |
| P101D | A/F Sensor Heater Circuit Performance Bank 1 Sensor 1 Stuck ON | The heater current is higher than the specified value while the heater is not operating (1 trip detection logic). | ECM | Comes on | DTC stored | DTC for Mexico Models - Applies |
HINT:
- Sensor 1 refers to the sensor closest to the engine assembly.
- Sensor 2 refers to the sensor farthest away from the engine assembly.