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P0037 Toyota Code - Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 2

- Code Popularity: 132,145 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0037 Toyota?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2
  • Heated Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted
  • Heated Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC P0037 Toyota?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0037 Toyota code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P0037 Toyota Description

The sensing portion of the heated oxygen sensor has a zirconia element which is used to detect the oxygen concentration in the exhaust gas. If the zirconia element is at the appropriate temperature, and the difference between the oxygen concentrations surrounding the inside and outside surfaces of the sensor is large, the zirconia element generates voltage signals. In order to increase the oxygen concentration detecting capacity of the zirconia element, the Engine Control Module (ECM) supplements the heat from the exhaust with heat from a heating element inside the sensor.
The ECM monitors the current applied to the heated oxygen sensor heater to check the heater for malfunctions.
If the heater current is outside the normal range, the signal transmitted by the heated oxygen sensor becomes inaccurate. When the current in the heated oxygen sensor heater is outside the normal operating range, the ECM interprets this as a malfunction in the sensor heater and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0037 Toyota - Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 2 - AutoCodes.com
P0037 Toyota Code - Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 2

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