Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 IP Line High Voltage
Table of contents
- Possible Causes
- How To Fix
- Tech Notes
- Cost To Diagnose
- When is the code detected
- Possible Symptoms
- Description
P2237 HONDA Possible Causes
- 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 do I fix code P2237 HONDA?
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.
Tech Notes
- For the following Honda models:
- 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.
Cost of diagnosing the P2237 HONDA code
The cost of diagnosing the P2237 HONDA 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.
When is the code detected
If the IPB 1 terminal voltage is out of a specified range, the PCM detects a malfunction and stores a DTC.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust
P2237 HONDA Description
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. The rear A/F sensor transmits output voltage to the powertrain control module (PCM). The PCM controls fuel injection duration by comparing the target air/fuel ratio with the rear A/F sensor signal. The sensor includes the VS cell, the pump cell, the atmospheric reference cavity, the diffusion layer, and the heater, and it enables overall feedback control.