DTC code

P0031: O2 Sensor 1/1 Heater Circuit Low

Vehicle-specific published guides for this diagnostic trouble code.

P0031/Engine sensors

O2 Sensor 1/1 Heater Circuit Low

P0031 may mean the PCM is seeing the O2 Sensor 1/1 heater control circuit lower than expected.

Article vehicle: 2019-2024 Ram 1500Classic 3.6PentastarGas

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P0031/Engine sensors

O2 Sensor 1/1 Heater Circuit Low

P0031 means the PCM may be seeing the upstream oxygen sensor heater control circuit as electrically low.

Article vehicle: 2019-2024 Ram 1500Classic 5.7HEMIGas

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P0031/Engine sensors

O2 Sensor 1/1 Heater Circuit Low

P0031 generally means the PCM may be seeing an electrical problem in the heater circuit for O2 Sensor 1/1, where the circuit is being interpreted as low.

Article vehicle: 2019-2024 Ram 1500DT 5.7HEMIGas

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P0031/Engine diagnostics

P0031 Diagnostic Guide

P0031 may indicate the PCM is seeing a low condition in the upstream oxygen sensor heater control circuit.

Article vehicle: 2019-2025 Ram 1500DT 3.6PentastarGas

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