AutoCodes – GMC – P2096 GMC

P2096 GMC Code - Post Catalyst Fuel Trim System Low Limit Bank 1

Quick Answer

Fuel trim bias is used to keep the post catalyst air/fuel ratio within a predetermined range. Common causes include Air intake duct collapsed or restricted, Air filter dirty or restricted, Objects blocking the throttle body. 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: P2096 GMC indicates Post Catalyst Fuel Trim System Low Limit Bank 1.
Common causes: Common causes include Air intake duct collapsed or restricted, Air filter dirty or restricted, Objects blocking the throttle body.
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 5,174

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 08, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2096 GMC Description

Fuel trim bias is used to keep the post catalyst air/fuel ratio within a predetermined range. This allows optimal catalyst efficiency under various operating conditions. The Engine Control Module (ECM) constantly monitors how lean or rich the fuel trim bias is commanded, to determine if the fuel trim bias is greater than a calibrated amount. The Diagnostic Trouble Code (DTC) will be set when the correction limit for a condition causing a rich or lean air/fuel ratio has been exceeded.

OBDII Code P2096 GMC - Post Catalyst Fuel Trim System Low Limit Bank 1 - AutoCodes.com — P2096 GMC Code - Post Catalyst Fuel Trim System Low Limit Bank 1

What does this mean?

What are the Possible Causes of the DTC P2096 GMC?

Air filter dirty or restricted
Objects blocking the throttle body
Excessive fuel in the crankcase. Change engine oil as necessary
Rich fuel injectors
Excessive fuel system pressure
Fuel contamination
Fuel saturation of the evaporative emissions (EVAP) canister
Stuck open or leaking EVAP purge valve
Restricted exhaust
Improper operation of the crankcase ventilation system

How to Fix the DTC P2096 GMC?

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 P2096 GMC 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 P2096 GMC code?

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Need Help with the Code?

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Information for Specific GMC Models

P2096 2014 GMC Sierra — Post Catalyst Fuel Trim System Low Limit Bank 1
P2096 2015 GMC Sierra — Post Catalyst Fuel Trim System Low Limit Bank 1
P2096 2016 GMC Sierra — Post Catalyst Fuel Trim System Low Limit Bank 1
P2096 2017 GMC Sierra — Post Catalyst Fuel Trim System Low Limit Bank 1
P2096 2018 GMC Sierra — Post Catalyst Fuel Trim System Low Limit Bank 1

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.