P2237 Honda Code - Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 IP Line High Voltage
Quick Answer
The rear air/fuel ratio (A/F) sensor (bank 1, sensor 1) is installed in the exhaust manifold and detects oxygen content in the exhaust gas. Common causes include Air/Fuel Ratio Sensor Bank 1 harness is open or shorted, Air/Fuel Ratio Sensor Bank 1 circuit poor electrical connection, Faulty Air/Fuel Ratio Sensor Bank 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
- P2237 Honda indicates Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 IP Line High Voltage.
- Common causes
- Common causes include Air/Fuel Ratio Sensor Bank 1 harness is open or shorted, Air/Fuel Ratio Sensor Bank 1 circuit poor electrical connection, Faulty Air/Fuel Ratio Sensor Bank 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 P2237 Honda Description
What are the Possible Causes of the DTC P2237 Honda?
- Air/Fuel Ratio Sensor Bank 1 harness is open or shorted
- Air/Fuel Ratio Sensor Bank 1 circuit poor electrical connection
- Faulty Air/Fuel Ratio Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
How to Fix the DTC P2237 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 P2237 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 P2237 Honda Code
1. What are common symptoms of OBDII code P2237 in a Honda?
- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the check engine light.
2. What does the OBDII code P2237 indicate in a Honda?
- OBDII code P2237 in a Honda indicates that the Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 is detecting a high voltage condition in the IP line.
3. What are possible causes of OBDII code P2237 in a Honda?
- Possible causes include a faulty rear air/fuel ratio sensor, wiring issues, exhaust leaks, or a problem with the engine control module.
4. How can I diagnose the cause of OBDII code P2237 in my Honda?
- You can start by inspecting the wiring and connections related to the rear air/fuel ratio sensor, checking for exhaust leaks, and testing the sensor itself using a multimeter.
5. Can I continue driving my Honda with OBDII code P2237 present?
- It is not recommended to drive your Honda with OBDII code P2237 present, as it can lead to poor engine performance and potentially cause further damage.
6. How can I repair OBDII code P2237 in my Honda?
- Repairing OBDII code P2237 typically involves replacing the rear air/fuel ratio sensor Bank 1 Sensor 1 and addressing any wiring or exhaust leaks that may be contributing to the issue.
7. Is it possible to reset OBDII code P2237 in a Honda without fixing the underlying issue?
- While you can clear the code using an OBDII scanner, it is important to address the root cause of the problem to prevent the code from reappearing.
8. Are there any maintenance tips to prevent OBDII code P2237 in a Honda?
- Regularly inspecting and maintaining your vehicle's sensors, wiring, and exhaust system can help prevent issues that may trigger OBDII code P2237.
9. Can a DIY enthusiast fix OBDII code P2237 in a Honda, or is professional help recommended?
- Depending on your skill level and access to tools, you may be able to replace the rear air/fuel ratio sensor Bank 1 Sensor 1 yourself. However, professional help is recommended if you are unsure or inexperienced.
10. Will OBDII code P2237 cause any long-term damage to my Honda if left unresolved?
- Ignoring OBDII code P2237 can lead to decreased fuel efficiency, engine performance issues, and potential damage to the catalytic converter over time, so it is best to address the issue promptly.
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