P2240 - O2 Sensor Positive Current Control Circuit Open Bank 2 Sensor 1

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3    What is this?
Table of contents

P2240 Possible Causes

  • Faulty Front Heated Oxygen Sensor Bank 2
  • Front Heated Oxygen Sensor Bank 2 harness is open or shorted
  • Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection

How do I fix code P2240?

Check 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.
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Cost of diagnosing the P2240 code

Labor: 1.0

The cost of diagnosing the P2240 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

P2240 Description

The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.
OBDII Code P2240 - O2 Sensor Positive Current Control Circuit Open Bank 2 Sensor 1 - AutoCodes.com

More Information

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Information for specific makes

  • P2240 ACURA Front Air/Fuel Ratio Sensor Bank 2 Sensor 1 IP Line High Voltage
  • P2240 DODGE O2 Sensor Positive Current Control Circuit Open Bank 2 Sensor 1
  • P2240 FORD Oxygen Sensor Positive Current Control Circuit Open Bank 2 Sensor 1
  • P2240 HONDA Front Air/Fuel Ratio Sensor Bank 2 Sensor 1 IP Line High Voltage
  • P2240 LEXUS A/F Sensor Bank 2 Open Circuit
  • P2240 LINCOLN Oxygen Sensor Positive Current Control Circuit Open - Bank 2 Sensor 1
  • P2240 MERCURY Oxygen Sensor Positive Current Control Circuit Open Bank 2 Sensor 1
  • P2240 SCION A/F Sensor Bank 2 Open Circuit
  • P2240 TOYOTA A/F Sensor Bank 2 Open Circuit

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