The OBD code P0157 for Honda indicates a fault with the Rear Heated Oxygen Sensor Bank 2. Symptoms include the Engine Light ON, high fuel consumption, and excessive exhaust smoke.
Causes can be a faulty sensor, wiring issues, fuel pressure problems, or intake/exhaust leaks.
It’s a moderate issue that can affect emissions and engine performance.
A possible fix involves inspecting and repairing the sensor, wiring, and related components.
Repair Importance Level | 6.67 (Out of 10) |
Estimated Repair Time | Approximately 1.0 hour |
Repair Difficulty Level | 6.67 (Out of 10) |
Symptoms of the Honda p0157 OBD Code
The specific fault code P0157 on a Honda indicates an issue with the oxygen sensor circuit low voltage.
- Symptoms for Honda OBD code P0157 include: Engine Light ON.
- High Fuel Consumption.
- Excessive Smoke from Exhaust.
Causes of the Honda p0157 OBD Code
Possible reasons for Honda fault code P0157 include issues with the oxygen sensor circuit in bank 2 sensor 2.
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- P0157 can be caused by a Faulty Rear Heated Oxygen Sensor Bank 2.
- A Rear Heated Oxygen Sensor Bank 2 harness that is open or shorted.
- A Rear Heated Oxygen Sensor Bank 2 circuit with poor electrical connection.
- Inappropriate fuel pressure.
- Faulty fuel injectors.
- Intake air leaks that may be faulty.
- Exhaust gas leaks.
Fixing Honda Error Code p0157 Step By Step
Replace the faulty Bank 2 Sensor 2 oxygen sensor on the Honda to address code P0157.
- To fix Honda OBDII code P0157, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, check the wiring leading to the Bank 2 Sensor 2 oxygen sensor for any breaks, frays, or damage.
- Test the oxygen sensor’s heater circuit for proper resistance and voltage.
- Replace the Bank 2 Sensor 2 oxygen sensor if it fails testing.
- Clear the fault codes and perform a road test to verify the repair.
Cost Of Fixing Honda p0157 Fault Code
Diagnosing and repairing Honda fault code P0157 may involve replacing the bank 2 sensor 2 oxygen sensor.
The cost to diagnose and fix a Honda OBD code P0157 typically ranges from $75 to $150, based on a labor rate of 1. 0 hour.
Factors like shop rates and complexity can affect the final cost.
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Details of the Honda p0157 OBD Code
Honda fault code P0157 indicates a low voltage condition in the bank 2, sensor 2 oxygen sensor.
Code P0157 on a Honda vehicle indicates a malfunction in the Bank 2, Sensor 2 oxygen sensor circuit.
This code is triggered when the Engine Control Module (ECM) detects that the voltage signal from the Bank 2, Sensor 2 oxygen sensor remains low for an extended period of time.
The Bank 2, Sensor 2 oxygen sensor is located after the catalytic converter and is responsible for monitoring the efficiency of the catalytic converter and adjusting fuel trim accordingly.
A low voltage signal from this sensor can indicate a rich airfuel mixture.
Mechanic’s Tech Notes
Detailed information on Honda fault code P0157, including possible causes and diagnostic steps.
To diagnose and fix OBDII code P0157 on a Honda, start by checking the wiring harness and connectors related to the Bank 2 Sensor 2 oxygen sensor.
Use a voltmeter to test the sensor’s heater circuit for proper voltage and resistance.
Inspect the connector pins for any damage, corrosion, or poor connections.
If the wiring and connectors look good, the issue may lie with the oxygen sensor itself.
Consider replacing the Bank 2 Sensor 2 oxygen sensor if all other components check out.
Remember to clear the code after making any repairs to see if the issue is resolved.
FAQ
Common causes of OBD code P0157 in a Honda: Faulty rear heated oxygen sensor Bank 2, open/shorted sensor harness, poor electrical connection, fuel pressure issues, faulty injectors, intake/exhaust leaks.
Diagnose and fix OBD code P0157 in your Honda by checking the rear heated oxygen sensor Bank 2 and its wiring for faults or damage.
It is not safe to continue driving with OBD code P0157 in your Honda. Address the faulty rear heated oxygen sensor Bank 2 to prevent further issues.

Wrap Up
If your Honda triggers OBD code P0157, you may experience poor fuel economy, rough idling, or failed emissions tests.
This code typically indicates a fault in the Bank 2 Sensor 2 oxygen sensor circuit, caused by a faulty sensor, damaged wiring, or a poor electrical connection.
To address Honda OBD code P0157, start by inspecting the wiring harness for any visible damage or corrosion.
Test the oxygen sensor connector for a secure fit and proper electrical contact.
If necessary, replace the Bank 2 Sensor 2 oxygen sensor with a new one to resolve the issue effectively