Engine-Codes - Toyota - P102D Toyota

P102D Toyota Code - O2 Sensor Heater Circuit Performance Bank 1 Sensor 2 Stuck ON

- Code Popularity: 3,202 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code P102D Toyota?

  • 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)

|How to Fix the P102D Toyota Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Code P102D Toyota Tech Notes





User Submitted Video

|What is the Cost to Diagnose the Code P102D Toyota?

Labor: 1.0

The cost to diagnose the P102D Toyota code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

Does your Toyota have Safety Recalls? → Check here

|What are Code P102D Toyota Possible Symptoms?

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

|What Does the P102D Toyota Code Mean?

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).

P102D Toyota Code - O2 Sensor Heater Circuit Performance Bank 1 Sensor 2 Stuck ON

|Need more Information on the P102D Toyota Code?

Need more information on how to fix the P102D Toyota code? Get Access to Factory Service Manuals

|Need Help with the P102D Toyota Code?

Get the P102D Toyota code diagnosed by a professional: Find a repair shop in your area