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P0165 Code - O2 Sensor Circuit Slow Response Bank 2 Sensor 3

- Code Popularity: 17,231 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0165?

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 Bank 2 Sensor 3
  • Heated Oxygen Sensor Bank 2 Sensor 3 harness is open or shorted
  • Heated Oxygen Sensor Bank 2 Sensor 3 circuit poor electrical connection
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How to Fix the DTC P0165?

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

Replacing the O2 Sensor 3 usually takes care of the problem

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0165 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.

When is the Code Detected?

Current amperage in the rear heated oxygen sensor heater circuit is out of the normal range.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

Code P0165 Description

The rear heated oxygen sensor (or sensor 3 for some vehicles), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Even if switching characteristics of the heated oxygen sensor 1 are shifted, the air-fuel ratio is controlled to stoichiometric, by the signal from the heated oxygen sensor 3. This sensor is made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. Under normal conditions the heated oxygen sensor 3 is not used for engine control operation.

OBDII Code P0165 - O2 Sensor Circuit Slow Response Bank 2 Sensor 3 - AutoCodes.com
P0165 Code - O2 Sensor Circuit Slow Response Bank 2 Sensor 3

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Information for Specific Makes

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