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P0037 - HO2S Heater Control Circuit Low Bank 1 Sensor 2

Possible causes
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 harness is open or shorted
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
What does this mean? What does this mean?
Tech notes
The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow, which is a very common problem for this type codes. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors.
HO2S Heater Control Circuit Low Bank 1 Sensor 2 is the generic definition for the P0037; however your vehicle's manufacturer may have a different definition and information for the P0037 code.
What does this mean? What does this mean?
When is the code detected?
The P0037 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0037 Description

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).

In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.

The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

OBDII Code P0037 - HO2S Heater Control Circuit Low Bank 1 Sensor 2 - AutoCodes.com
P0037 Information for specific makes
P0037 AUDI HO2S Heater Control Circuit Low Bank 1 Sensor 2  P0037 Image
P0037 BMW HO2S 12 Heater Control Circuit Low  P0037 Image
P0037 BUICK HO2S12 Heater Control Circuit Low Voltage  P0037 Image
P0037 CADILLAC HO2S12 Heater Control Circuit Low Voltage  P0037 Image
P0037 CHEVROLET HO2S12 Heater Control Circuit Low Voltage  P0037 Image
P0037 CHRYSLER O2 Sensor 1/2 Heater Circuit Low  P0037 Image
P0037 DODGE O2 Sensor 1/2 Heater Circuit Low  P0037 Image
P0037 GMC HO2S12 Heater Control Circuit Low Voltage  P0037 Image
P0037 HYUNDAI HO2S 12 Heater Circuit Low  P0037 Image
P0037 INFINITI HO2S12 Heater Control Circuit Low  P0037 Image
P0037 JEEP O2 Sensor 1/2 Heater Circuit Low  P0037 Image
P0037 KIA HO2S 12 Hater Circuit Low Input  P0037 Image
P0037 LEXUS Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 2  P0037 Image
P0037 MAZDA HO2S Heater Control Circuit Low 12  P0037 Image
P0037 MINI HO2S 12 Heater Control Circuit Low  P0037 Image
P0037 MITSUBISHI Cylinder 1-4 Heated Oxygen Sensor Rear Heater Control Circuit Low  P0037 Image
P0037 NISSAN HO2S12 Heater Control Circuit Low  P0037 Image
P0037 PONTIAC HO2S12 Heater Control Circuit Low Voltage  P0037 Image
P0037 SATURN HO2S12 Heater Control Circuit Low Voltage  P0037 Image
P0037 SCION Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 2  P0037 Image
P0037 SUBARU HO2S12 Heater Control Circuit Low  P0037 Image
P0037 SUZUKI HO2S12 Heater Control Circuit Low  P0037 Image
P0037 TOYOTA Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 2  P0037 Image
P0037 VOLKSWAGEN HO2S Heater Control Circuit Low Bank 1 Sensor 2  P0037 Image
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