AutoCodes – Honda – P1157 2009 Honda Accord

P1157 2009 Honda Accord Code - Air/Fuel Ratio Sensor 1 Range/Performance Problem

Quick Answer

The Air/Fuel Ratio (A/F) sensor 1 is installed in the exhaust system and detects oxygen content in the exhaust gas. Common causes include Faulty Air/Fuel Ratio Sensor 1, Air/Fuel Ratio Sensor 1 harness is open or shorted, Air/Fuel Ratio Sensor 1 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1157 2009 Honda Accord indicates Air/Fuel Ratio Sensor 1 Range/Performance Problem.
Common causes: Common causes include Faulty Air/Fuel Ratio Sensor 1, Air/Fuel Ratio Sensor 1 harness is open or shorted, Air/Fuel Ratio Sensor 1 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 7,285

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 03, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1157 2009 Honda Accord Description

The Air/Fuel Ratio (A/F) sensor 1 is installed in the exhaust system and detects oxygen content in the exhaust gas. The A/F sensor transmits output voltage to the Engine Control Module (ECM). A heater for the sensor element is embedded in the A/F sensor (sensor 1). It is activated and heats the sensor to stabilize and speed the detection of oxygen content by controlling current flowing through the heater. An increase in the current levels off as the applied voltage to the element electrode reaches a certain range because the amount of oxygen which is led through the diffusion layer is limited. The current amperage is proportional to oxygen content in the exhaust gas, so the air/fuel ratio is detected by the measurement of the current amperage. The ECM compares a set target air/fuel ratio with the detected air/fuel ratio and controls the fuel injection timing.
If the A/F sensor (sensor 1) voltage is low, the air/fuel ratio is lean, and the ECM uses A/F feedback control to issue a Rich command. If the A/F sensor (sensor 1) voltage is high, the air/fuel ratio is rich, and the ECM uses A/F feedback control to issue a Lean command.

OBDII Code P1157 2009 Honda Accord - Air/Fuel Ratio Sensor 1 Range/Performance Problem - AutoCodes.com — P1157 2009 Honda Accord Code - Air/Fuel Ratio Sensor 1 Range/Performance Problem

What does this mean?

What are the Possible Causes of the DTC P1157 2009 Honda Accord?

Faulty Air/Fuel Ratio Sensor 1
Air/Fuel Ratio Sensor 1 harness is open or shorted
Air/Fuel Ratio Sensor 1 circuit poor electrical connection

How to Fix the DTC P1157 2009 Honda Accord?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1157 2009 Honda Accord 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.

Need more information about the P1157 2009 Honda Accord code?

Need more information on how to fix the P1157 2009 Honda Accord code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1157 2009 Honda Accord Code

1. What are the common symptoms of OBDII code P1157 in a 2009 Honda Accord?

The common symptoms of code P1157 in a 2009 Honda Accord may include poor fuel economy, rough idling, engine hesitation, and an illuminated check engine light.

2. What does OBDII code P1157 on a 2009 Honda Accord indicate?

Code P1157 in a 2009 Honda Accord indicates a potential Air/Fuel Ratio Sensor 1 Range/Performance Problem, specifically related to the sensor located before the catalytic converter.

3. What are the possible causes of OBDII code P1157 in a 2009 Honda Accord?

Possible causes of code P1157 in a 2009 Honda Accord include a faulty air/fuel ratio sensor, wiring or connector issues, vacuum leaks, exhaust system leaks, or issues with the engine's air intake system.

4. How can I diagnose the OBDII code P1157 on my 2009 Honda Accord?

Diagnosing code P1157 on a 2009 Honda Accord typically involves using an OBDII scanner to retrieve the code, inspecting the air/fuel ratio sensor and its wiring, checking for vacuum or exhaust leaks, and testing the sensor's performance using a multimeter.

5. Can I continue to drive my 2009 Honda Accord with OBDII code P1157?

It is generally not recommended to continue driving your 2009 Honda Accord with code P1157, as it can lead to decreased fuel efficiency, engine performance issues, and potential damage to the catalytic converter.

6. How can I repair OBDII code P1157 on my 2009 Honda Accord?

Repairing code P1157 on a 2009 Honda Accord may involve replacing the air/fuel ratio sensor, repairing any wiring or connector issues, fixing vacuum or exhaust leaks, and clearing the code with an OBDII scanner.

7. Is it necessary to reset the ECU after repairing OBDII code P1157 on a 2009 Honda Accord?

After repairing code P1157 on a 2009 Honda Accord, it is recommended to reset the Engine Control Unit (ECU) using an OBDII scanner to clear the code and ensure proper operation of the vehicle.

8. How much does it cost to repair OBDII code P1157 on a 2009 Honda Accord?

The cost to repair code P1157 on a 2009 Honda Accord can vary depending on the exact cause of the issue, but it may range from $200 to $500 or more, including parts and labor.

9. Can a DIY enthusiast repair OBDII code P1157 on a 2009 Honda Accord?

A DIY enthusiast with the necessary tools and knowledge may be able to repair code P1157 on a 2009 Honda Accord, especially if the issue is related to simple fixes like sensor replacement or wiring repair.

10. How often does OBDII code P1157 occur in a 2009 Honda Accord?

Code P1157 in a 2009 Honda Accord can occur occasionally due to sensor wear or environmental factors, but regular maintenance and timely repairs can help prevent its occurrence.