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TuningBot DTC Database · v4.37.15

P2245 O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainEmissionsOBD2

What P2245 means

P2245
O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1 Generic · emissions Data confidence 85%

The control module detected that the signal in the O2 Sensor Reference Voltage circuit stayed below the expected operating range.

Symptoms

  • MIL illuminated
  • Possible increased fuel consumption
  • Possible unstable idle

Possible causes

  • Wiring short to ground
  • H025

Recommended checks

  • Read live sensor voltage/current and heater status
  • Inspect wiring and connectors
  • Check for exhaust leaks near the sensor
  • Check fuel trim values for upstream mixture faults

Related and nearby codes

How to read P2245

P

Powertrain: engine, transmission and driveline systems.

2

Generic SAE-standard code: same meaning on every make.

245

Specific fault index within the subsystem.

Frequently asked questions about P2245

What does P2245 mean?

O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1. The control module detected that the signal in the O2 Sensor Reference Voltage circuit stayed below the expected operating range.

Is P2245 generic or manufacturer-specific?

P2245 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P2245 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

ECU tuningDyno-tested results by model and engine See the results →

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