P1152 - FAULT CODE - OBD2

POST UPDATED IN February, 2023

P1152 Code failures by brands

P1152 BMW, MINI: O2 SENSOR HEATER CIRCUIT LOW VOLTAGE BANK 2 SENSOR 1

P1152 SUBARU: HO2S11 SENSOR CIRCUIT RANGE/PERFORMANCE LOW

P1152 SUZUKI: HO2S21 CIRCUIT SHORTED TO HEATER POWER SUPPLY

Description of DTC code P1152

An Oxygen Sensor (HO2S) is employed in the engine combustion system to report the oxygen content that is present in the exhaust. The wires from these sensors are connected to the PCM (Powertrain Control Module) via the CAN bus (Controller Area Network) to tell the PCM about the oxygen content and the controller makes the appropriate adjustments accordingly.

For the most accurate HO2S readings, it must have an operating temperature. This is why the sensors are equipped with a heating element, which significantly reduces the time it takes to reach that temperature.

The diagnostic code P1152 OBDII is a specific code, which is used by many manufacturers to signal a failure of an oxygen sensor. To find out the specific application for your vehicle model, please refer to the information source.

Symptoms of fault code P1152

  • Check Engine light on.
  • Lower fuel efficiency.
  • Loss of engine power.

Causes of OBD2 P1152

The reasons for setting the P1152 OBD2 fault code are:

  • Oxygen Sensor wires or connectors may be deficient.
  • HO2S circuit may have damaged electrical connections which in turn cause a short circuit.
  • The Oxygen Sensor could be defective.

Possible solutions of the DTC code P1152

When the DTC P1152 OBDII code is set, you must do the following to fix it:

  • Consult the TSB.
  • Check that all the cables and connectors of the Oxygen Sensor are in optimal conditions for a good performance of the system. In case of finding common deficiencies, make the respective repairs or necessary changes.
  • Using the appropriate tools and the engine at operating temperature, check the correct operation of the HO2S. If the values obtained differ from those specified by the manufacturer, it is necessary to verify the integrity of the electrical connections and of the sensor itself. Make the appropriate corrections.

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