AutoCodes – Chevrolet – P1156 Chevrolet

P1156 Chevrolet Code - HO2S Rich Average Bank 2 Sensor 1

Quick Answer

P1156 Chevrolet indicates HO2S Rich Average Bank 2 Sensor 1. Common causes include Faulty O2 Sensor Heater Bank 2 Sensor 1, O2 Sensor Heater Bank 2 Sensor 1 harness is open or shorted, O2 Sensor Heater Bank 2 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: P1156 Chevrolet indicates HO2S Rich Average Bank 2 Sensor 1.
Common causes: Common causes include Faulty O2 Sensor Heater Bank 2 Sensor 1, O2 Sensor Heater Bank 2 Sensor 1 harness is open or shorted, O2 Sensor Heater Bank 2 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 3,182

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

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

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1156 Chevrolet Description

OBDII Code P1156 Chevrolet - HO2S Rich Average Bank 2 Sensor 1 - AutoCodes.com — P1156 Chevrolet Code - HO2S Rich Average Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P1156 Chevrolet?

Faulty O2 Sensor Heater Bank 2 Sensor 1
O2 Sensor Heater Bank 2 Sensor 1 harness is open or shorted
O2 Sensor Heater Bank 2 Sensor 1 circuit poor electrical connection

How to Fix the DTC P1156 Chevrolet?

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 P1156 Chevrolet 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.

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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.