AutoCodes – GMC – P02D7 2018 GMC Sierra

P02D7 2018 GMC Sierra Code - Cylinder 6 Injector Exceeded Maximum Learning Limit

Quick Answer

In the calibration/controls community this diagnostic is referred to as the Fuel Setpoint Adaptation (FSA). Common causes include Faulty Cylinder 1 Fuel Injector, Cylinder 1 Fuel Injector harness is open or shorted, Cylinder 1 Fuel Injector 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: P02D7 2018 GMC Sierra indicates Cylinder 6 Injector Exceeded Maximum Learning Limit.
Common causes: Common causes include Faulty Cylinder 1 Fuel Injector, Cylinder 1 Fuel Injector harness is open or shorted, Cylinder 1 Fuel Injector 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 213

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 Mar 22, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P02D7 2018 GMC Sierra Description

In the calibration/controls community this diagnostic is referred to as the Fuel Setpoint Adaptation (FSA). This algorithm is used to estimate the actual injected fuel quantity. This estimated quantity is used to correct Engine Control Module (ECM) set points for items such as Exhaust Gas Recirculation (EGR), Boost Pressure, Fuel Rail Pressure, etc. The goal of FSA is to account for injectors that drift during the lifetime of the vehicle. The algorithm estimates the real injected fuel quantity by using input from the Mass Air Flow (MAF) sensor & Nitrogen Oxides (NOx) sensor 1 to determine the air/fuel ratio. If airflow parameters are incorrect due to leaks, blockages, malfunctioning EGR, inaccurate MAF sensor/NOx sensor 1 signals, or fuel injectors that are not performing as intended, a skewed air-fuel ratio could negatively affect the FSA. The Diagnostic Trouble Code (DTC) will be set when the Control Circuit commanded state does not match the actual state.

OBDII Code P02D7 2018 GMC Sierra - Cylinder 6 Injector Exceeded Maximum Learning Limit - AutoCodes.com — P02D7 2018 GMC Sierra Code - Cylinder 6 Injector Exceeded Maximum Learning Limit

What does this mean?

What are the Possible Causes of the DTC P02D7 2018 GMC Sierra?

Faulty Cylinder 1 Fuel Injector
Cylinder 1 Fuel Injector harness is open or shorted
Cylinder 1 Fuel Injector circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P02D7 2018 GMC Sierra?

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 P02D7 2018 GMC Sierra 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 P02D7 2018 GMC Sierra code?

Need more information on how to fix the P02D7 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the 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.

Frequently Asked Questions about P02D7 2018 GMC Sierra Code

1. What does the OBDII code P02D7 mean on a 2018 GMC Sierra?

P02D7 indicates that the fuel injector for cylinder 6 has exceeded its maximum learning limit, meaning the ECU detected a deviation from expected fuel delivery.

2. What are the common symptoms of code P02D7 in a 2018 GMC Sierra?

Symptoms may include rough idling, poor engine performance, reduced fuel efficiency, hesitation during acceleration, and possible misfires in cylinder 6.

3. What causes the P02D7 code to appear in a 2018 GMC Sierra?

Common causes include a faulty fuel injector, clogged injector, wiring issues to the injector, fuel delivery problems, or a malfunctioning engine control module (ECM).

4. Can I drive my 2018 GMC Sierra with a P02D7 code?

Driving with this code is not recommended as it may lead to further engine damage, poor performance, and increased emissions.

5. How do I diagnose the P02D7 code on my GMC Sierra?

Start by inspecting the cylinder 6 fuel injector for clogs or damage, checking the wiring and connectors for faults, and testing the fuel pressure and ECM functionality.

6. How can a faulty fuel injector cause the P02D7 code?

A faulty injector may deliver too much or too little fuel, causing the ECM to detect an imbalance and set the P02D7 code.

7. What tools are needed to troubleshoot the P02D7 code?

You’ll need an OBDII scanner, a multimeter, fuel pressure gauge, and possibly an injector cleaning kit or replacement parts.

8. How much does it cost to fix the P02D7 code on a 2018 GMC Sierra?

Repair costs vary, but fuel injector replacement typically ranges from $150 to $400 per injector, plus labor. Diagnosing wiring or ECM issues may add to the cost.

9. Can cleaning the injector resolve the P02D7 code?

Yes, if the issue is caused by a clogged injector, cleaning it using an injector cleaning solution or professional service may resolve the problem.

10. When should I consult a professional mechanic for the P02D7 code?

If you lack the tools or expertise to diagnose or repair the issue, or if the problem persists after basic troubleshooting, seek professional assistance.