AutoCodes – Generic – P02AA

P02AA Code - Cylinder 5 - Fuel Trim at Max Limit

Quick Answer

The Powertrain Control Module (PCM) monitors the fuel pressure at the fuel rail through the Fuel Pressure Sensor (FPS). Common causes include Faulty Fuel Injector 5, Clogged or Leaking Fuel Injector 5, Fuel Injector 5 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: P02AA indicates Cylinder 5 - Fuel Trim at Max Limit.
Common causes: Common causes include Faulty Fuel Injector 5, Clogged or Leaking Fuel Injector 5, Fuel Injector 5 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 3,776

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 Apr 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P02AA Description

The Powertrain Control Module (PCM) monitors the fuel pressure at the fuel rail through the Fuel Pressure Sensor (FPS). The PCM sets the OBDII code when the fuel pressure is out of factory specifications.

OBDII Code P02AA - Cylinder 5 - Fuel Trim at Max Limit - AutoCodes.com — P02AA Code - Cylinder 5 - Fuel Trim at Max Limit

What does this mean?

What are the Possible Causes of the DTC P02AA?

Faulty Fuel Injector 5
Clogged or Leaking Fuel Injector 5
Fuel Injector 5 harness is open or shorted
Fuel Injector 5 circuit poor electrical connection

How to Fix the DTC P02AA?

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 P02AA 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 P02AA code?

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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.