P2240 Honda Code - Front Air/Fuel Ratio Sensor Bank 2 Sensor 1 IP Line High Voltage
Quick Answer
The Air-Fuel ratio (A/F) sensor provides output voltage approximately equal to the existing air-fuel ratio. Common causes include Air/Fuel Ratio Sensor Bank 2 Sensor 1 harness is open or shorted, Air/Fuel Ratio Sensor Bank 2 Sensor 1 circuit poor electrical connection, Faulty Air/Fuel Ratio Bank 2 Sensor 1. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P2240 Honda indicates Front Air/Fuel Ratio Sensor Bank 2 Sensor 1 IP Line High Voltage.
- Common causes
- Common causes include Air/Fuel Ratio Sensor Bank 2 Sensor 1 harness is open or shorted, Air/Fuel Ratio Sensor Bank 2 Sensor 1 circuit poor electrical connection, Faulty Air/Fuel Ratio Bank 2 Sensor 1.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P2240 Honda Description
The A/F sensor output voltage is used to provide feedback for the Engine Control Module (ECM) to control the air-fuel ratio.
With the A/F sensor output, the ECM can determine deviation from the stoichiometric air-fuel ratio and control proper injection time. If the A/F sensor is malfunctioning, the ECM is unable to accurately control air-fuel ratio.
The A/F sensor is equipped with a heater which heats the zirconia element. The heater is also controlled by the ECM. When the intake air volume is low (the temperature of the exhaust gas is low), current flows to the heater which heats the sensor to facilitate detection of accurate oxygen concentration.
The A/F sensor is a planar type. Compared to a conventional type, the sensor and heater portions are narrower. Because the heat of the heater is conducted through the alumina to zirconia (of the sensor portion), sensor activation is accelerated.
The code is output when there is an open or short in the A/F sensor circuit, or if A/F sensor output drops. To detect these problems, the voltage of the A/F sensor is monitored when turning the ignition switch to the ON position, and the admittance (admittance is an electrical term that indicates the ease of flow of current) is checked while driving. If the voltage of the A/F sensor is between 0.6 V and 4.5 V, it is considered normal. If the voltage is outside of the specified range, or the admittance is less than the standard value, the ECM will determine that there is a malfunction in the A/F sensor. If the same malfunction is detected in the next driving cycle, the MIL is illuminated and a DTC is set.
What are the Possible Causes of the DTC P2240 Honda?
- Air/Fuel Ratio Sensor Bank 2 Sensor 1 harness is open or shorted
- Air/Fuel Ratio Sensor Bank 2 Sensor 1 circuit poor electrical connection
- Faulty Air/Fuel Ratio Bank 2 Sensor 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
How to Fix the DTC P2240 Honda?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
2003-2005 Honda Accord V6s
2005 Honda Odysseys
2005 Honda Pilots
2006 Honda Ridgelines
To fix this problem, check the sensor wiring and connections for damage. If the sensor circuit is OK, and the DTC(s) come back after clearing them and doing a short test-drive, replace the A/F sensor. The replacement A/F sensors in Honda parts stock are an improved version over the original sensor.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2240 Honda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P2240 Honda Code
No Frequently Asked Questions about P2240 Honda Code found.
Discuss the causes and fixes for P2240 Honda OBDII Code
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I have a 2004 V6 Honda Accord. I originally had two codes - P0154 and P2240. I looked at the front O2 sensor in the exhaust just behind the radiator and saw some green stiff in the connector. I cleaned with some alcohol and the P0154 code went away. I am still having the P2240 code. What do I do next. I understand there is a second front sensor. Where do I find it? Thanks for your help.
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You don't need to look at the other sensor, because both codes are for the same sensor. The sensor you clean the connector. More than likely you have to replace the sensor to fix the problem, it's a very common problem.
P2240 Honda - Front Air/Fuel Ratio Sensor Bank 2 Sensor 1 IP Line High Voltage
Read more: https://www.autocodes.com/p22...
P0154 Honda - Front Air/Fuel Ratio Sensor Bank 2 Sensor 1
Read more: https://www.autocodes.com/p01...
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I have this code on my 2004 Accord v6. I replaced the sensor and the code went away for a couple weeks. Now the code is back and I can tell my gas mileage is down. What's next?
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Did you use a factory sensor?
If you did use factory sensor, then the next step is to check for intake leaks or leaking injectors, also make sure the sensor connector is clean.
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