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AutoCodes – GMC – P01D8 2016 GMC Sierra

P01D8 2016 GMC Sierra Code - Cylinder 7 Injection Timing Advanced

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
P01D8 2016 GMC Sierra indicates Cylinder 7 Injection Timing Advanced.
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 174
How popular is this code, among other codes? Low
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Table of contents Created and updated by William Orellana on Mar 22, 2024
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Code P01D8 2016 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 P01D8 2016 GMC Sierra - Cylinder 7 Injection Timing Advanced - AutoCodes.com
P01D8 2016 GMC Sierra Code - Cylinder 7 Injection Timing Advanced
What does this mean?

What are the Possible Causes of the DTC P01D8 2016 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 P01D8 2016 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 P01D8 2016 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 P01D8 2016 GMC Sierra code?

Need more information on how to fix the P01D8 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P01D8 2016 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 P01D8 2016 GMC Sierra Code

1. What does the OBDII code P01D8 mean on a 2016 GMC Sierra?

P01D8 indicates that the injection timing for Cylinder 7 is advanced beyond the expected range, which can affect engine performance.

2. What are the common symptoms of code P01D8 in a 2016 GMC Sierra?

Symptoms may include rough idling, reduced fuel efficiency, engine misfires, or the check engine light illuminating.

3. What causes the P01D8 code to appear in a GMC Sierra?

Common causes include a faulty fuel injector, issues with the injector timing solenoid, wiring problems, or a malfunctioning engine control module (ECM).

4. Can I drive my 2016 GMC Sierra with a P01D8 code?

Driving with this code is not recommended as it can lead to further engine damage or reduced performance over time.

5. How do I diagnose the P01D8 code on a 2016 GMC Sierra?

Diagnosis involves checking the fuel injector for Cylinder 7, inspecting wiring and connectors, and testing the ECM for proper functionality.

6. How serious is the P01D8 code for a GMC Sierra?

The P01D8 code is moderately serious, as it can lead to engine performance issues and potential long-term damage if not addressed.

7. What repairs can fix the P01D8 code on a 2016 GMC Sierra?

Repairs may include replacing the Cylinder 7 fuel injector, repairing damaged wiring, or recalibrating the ECM.

8. How much does it cost to repair the P01D8 code on a GMC Sierra?

Repair costs vary but can range from $150 to $500, depending on whether parts like the injector or ECM need replacement.

9. Can a software update resolve the P01D8 code on a GMC Sierra?

In some cases, a software update or ECM reprogramming may fix timing issues if no mechanical faults are found.

10. How can I prevent the P01D8 code from recurring in my GMC Sierra?

Regular maintenance, such as keeping the fuel system clean and inspecting wiring for damage, can help prevent this code from recurring.

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