Engine-Codes.com
Engine-Codes – Generic – P1155

P1155 Code - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1

Quick Answer

The P1155 code indicates a malfunction in the air/fuel ratio sensor heater circuit for Bank 2 Sensor 1. Common causes include Faulty air/fuel ratio sensor, Damaged wiring or connectors in the heater circuit, Blown fuse related to the sensor heater. 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
P1155 indicates Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1.
Common causes
Common causes include Faulty air/fuel ratio sensor, Damaged wiring or connectors in the heater circuit, Blown fuse related to the sensor heater.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P1155 Description

The P1155 code indicates a malfunction in the air/fuel ratio sensor heater circuit for Bank 2 Sensor 1. This sensor is responsible for monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module to adjust the air/fuel mixture for optimal combustion. The heater circuit is essential for the sensor to reach operating temperature quickly, especially during cold starts, to provide accurate readings.

OBDII Code P1155 - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1
P1155 Code - Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1

Common Causes of P1155

  1. Faulty air/fuel ratio sensor
  2. Damaged wiring or connectors in the heater circuit
  3. Blown fuse related to the sensor heater
  4. Malfunctioning engine control module
  5. Environmental factors such as extreme temperatures affecting the sensor's performance

Symptoms of P1155

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Hesitation or loss of power during acceleration
  4. Increased emissions
  5. Illuminated check engine light

How to Fix P1155

  1. Use an OBD-II scanner to confirm the P1155 code and pinpoint the specific sensor and circuit affected.
  2. Inspect the wiring and connectors for any signs of damage or corrosion. Repair or replace as necessary.
  3. Check the fuse related to the sensor heater and replace if blown.
  4. Test the air/fuel ratio sensor's functionality and replace if found to be faulty.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1155

The typical repair costs for addressing a P1155 code can range from $200 to $500, including parts and labor. However, the final cost may vary depending on the specific components needing replacement, the vehicle's make and model, and the labor rates at the auto repair shop. It's recommended to obtain quotes from multiple shops to compare prices and ensure a fair estimate for the repair.

Need more information about the P1155 code?

Need more information on how to fix the P1155 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1155 code diagnosed by a professional: Find a repair shop in your area

Code P1155 Information for Specific Makes

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 P1155 Code

No Frequently Asked Questions about P1155 Code found.

Discuss the causes and fixes for P1155 OBDII Code

Submit a New Comment

Code P1155 comments

No comments found for this page.