AutoCodes – Mazda – P167B Mazda

P167B Mazda Code - Fuel Injection Amount Learning Not Completed In Fuel Injection System

Quick Answer

The P167B code indicates that the Powertrain Control Module (PCM) has detected an issue with the Fuel Injection System, specifically that the fuel injector injection amount correction process has not been completed. Common causes include Fuel injector injection amount correction is not completed, Faulty Powertrain Control Module (PCM), PCM harness is open or shorted. 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: P167B Mazda indicates Fuel Injection Amount Learning Not Completed In Fuel Injection System.
Common causes: Common causes include Fuel injector injection amount correction is not completed, Faulty Powertrain Control Module (PCM), PCM harness is open or shorted.
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 179

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 Jan 26, 2026

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P167B Mazda Description

The P167B code indicates that the Powertrain Control Module (PCM) has detected an issue with the Fuel Injection System, specifically that the fuel injector injection amount correction process has not been completed. This process is crucial for ensuring that the engine receives the correct amount of fuel for optimal combustion and performance. The PCM relies on various sensors to monitor engine parameters and adjust the fuel injection accordingly. If the injection amount correction is incomplete, it can lead to improper fuel delivery, which may result in poor engine performance, increased emissions, and reduced fuel efficiency.

OBDII Code P167B Mazda - Fuel Injection Amount Learning Not Completed In Fuel Injection System - AutoCodes.com — P167B Mazda Code - Fuel Injection Amount Learning Not Completed In Fuel Injection System

What does this mean?

What are the Possible Causes of the DTC P167B Mazda?

Fuel injector injection amount correction is not completed
Faulty Powertrain Control Module (PCM)
PCM harness is open or shorted
PCM circuit poor electrical connection

How to Fix the DTC P167B Mazda?

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 P167B Mazda 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.