AutoCodes – GMC – P1416 GMC

P1416 GMC Code - Secondary Air Injection System Bank 2

Quick Answer

A Secondary Air Injection (AIR) pump is used on this vehicle to lower tail pipe emissions on start-up. Common causes include Faulty Secondary Air Injection (AIR) pump, Secondary Air Injection check valve bank 2, Secondary Air Injection (AIR) pump electrical circuit fault. 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: P1416 GMC indicates Secondary Air Injection System Bank 2.
Common causes: Common causes include Faulty Secondary Air Injection (AIR) pump, Secondary Air Injection check valve bank 2, Secondary Air Injection (AIR) pump electrical circuit fault.
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 29,619

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 21, 2019

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
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Code P1416 GMC Description

A Secondary Air Injection (AIR) pump is used on this vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module (PCM) supplies a ground to the AIR pump relay, which energizes the AIR pump. The PCM monitors the HO2S voltages to diagnose the AIR system. During the AIR test, the PCM activates the AIR pump during closed loop operation. When the AIR is activated, the PCM monitors the HO2S voltages and short term fuel trim values for both banks of the engine. If the AIR system is operating properly, the HO2S voltages should go low and the short term fuel trim should go high.

OBDII Code P1416 GMC - Secondary Air Injection System Bank 2 - AutoCodes.com — P1416 GMC Code - Secondary Air Injection System Bank 2

What does this mean?

What are the Possible Causes of the DTC P1416 GMC?

Faulty Secondary Air Injection (AIR) pump
Secondary Air Injection check valve bank 2
Secondary Air Injection (AIR) pump electrical circuit fault
Blocked Secondary Air Injection (AIR) system

How to Fix the DTC P1416 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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1416 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.

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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.