AutoCodes – GMC – P01D7 2015 GMC Sierra

P01D7 2015 GMC Sierra Code - Cylinder 7 Injection Timing Retarded

Quick Answer

The Engine Control Module (ECM) has the ability to learn injector timing performance. Common causes include Fuel Type Incorrect, Fuel Contaminated/Poor Quality, Faulty Fuel Injector 1. 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: P01D7 2015 GMC Sierra indicates Cylinder 7 Injection Timing Retarded.
Common causes: Common causes include Fuel Type Incorrect, Fuel Contaminated/Poor Quality, Faulty Fuel Injector 1.
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 237

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 P01D7 2015 GMC Sierra Description

The Engine Control Module (ECM) has the ability to learn injector timing performance. When the engine is at operating temperature, throttle closed and in deceleration fuel cut-off mode, the ECM will pulse each injector individually and measure the changes in rotational speed of the crankshaft using the input from the crankshaft position sensor. The ECM will run this diagnostic at one fuel rail pressure operating point for each injector. The ECM stores the injector timing value. The Diagnostic Trouble Code (DTC) will be set when the Fuel Injection Timing is out of range.

OBDII Code P01D7 2015 GMC Sierra - Cylinder 7 Injection Timing Retarded - AutoCodes.com — P01D7 2015 GMC Sierra Code - Cylinder 7 Injection Timing Retarded

What does this mean?

What are the Possible Causes of the DTC P01D7 2015 GMC Sierra?

Fuel Type Incorrect
Fuel Contaminated/Poor Quality
Faulty Fuel Injector 1
Fuel Injector 1 harness is open or shorted
Fuel Injector 1 circuit poor electrical connection
Engine Mechanical Problem

How to Fix the DTC P01D7 2015 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 P01D7 2015 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 P01D7 2015 GMC Sierra code?

Need more information on how to fix the P01D7 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P01D7 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P01D7 2015 GMC Sierra Code

1. What does the OBDII code P01D7 mean on a 2015 GMC Sierra?

P01D7 indicates that the injection timing for cylinder 7 is retarded, meaning the fuel injection is occurring later than it should.

2. What are the common symptoms of code P01D7 in a 2015 GMC Sierra?

Symptoms include rough idling, reduced engine performance, poor fuel economy, increased emissions, and potentially engine misfires.

3. What causes the P01D7 code to appear?

Possible causes include a faulty fuel injector, issues with the fuel injector wiring or connector, a malfunctioning ECM, or carbon buildup restricting proper injector operation.

4. Can driving with a P01D7 code damage my GMC Sierra?

Yes, prolonged driving with this issue can cause further engine damage, reduced fuel efficiency, and increased wear on engine components.

5. How do I fix the P01D7 code on my 2015 GMC Sierra?

Repairs may involve cleaning or replacing the fuel injector for cylinder 7, checking and repairing wiring or connectors, or reprogramming or replacing the ECM.

6. How is the P01D7 code diagnosed?

A mechanic will use a scan tool to confirm the code, inspect the fuel injector and wiring for cylinder 7, and may perform tests like injector flow rate analysis or ECM diagnostics.

7. Can a clogged fuel injector cause the P01D7 code?

Yes, a clogged or restricted injector can delay fuel delivery and trigger the code.

8. Is the P01D7 code specific to cylinder 7?

Yes, this code specifically refers to the injection timing issue in cylinder 7.

9. Will clearing the P01D7 code solve the issue?

Clearing the code without addressing the underlying issue will only result in the code reappearing.

10. How much does it cost to fix a P01D7 code on a 2015 GMC Sierra?

Repair costs can vary, ranging from $100 for cleaning an injector to $500 or more for parts and labor if the injector or ECM needs replacement.

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