Front Air/Fuel Ratio Sensor 1 Bank 2 Signal Stuck Lean
Table of contents
P2197 HONDA Possible Causes
- Faulty Front Air/Fuel Ratio Sensor
- Front Air/Fuel Ratio Sensor harness is open or shorted
- Front Air/Fuel Ratio Sensor circuit poor electrical connection
How do I fix code P2197 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
- There is a Factory Service Bulletin for the 2003-2004 Honda Accord:
- 2003-2004 Honda Accord Factory Service Bulletin OBDII Code P2197
Cost of diagnosing the P2197 HONDA code
The cost of diagnosing the P2197 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.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
P2197 HONDA Description
Air-Fuel Ratio (A/F) sensor need to reach a minimum operating temperature of 1200 degrees F to produce an accurate voltage signal. The faster the air-fuel ratio sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the air-fuel ratio sensor. The ECM controls the air-fuel ratio sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.