AutoCodes – GMC – P01D8 2017 GMC Sierra

P01D8 2017 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 2017 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 185

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 P01D8 2017 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 2017 GMC Sierra - Cylinder 7 Injection Timing Advanced - AutoCodes.com — P01D8 2017 GMC Sierra Code - Cylinder 7 Injection Timing Advanced

What does this mean?

What are the Possible Causes of the DTC P01D8 2017 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 2017 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 2017 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 2017 GMC Sierra code?

Need more information on how to fix the P01D8 2017 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 P01D8 2017 GMC Sierra Code

What does the OBDII code P01D8 mean on a 2017 GMC Sierra?

The P01D8 code indicates that the injection timing for cylinder 7 is advanced beyond the manufacturer’s specified range.

What are the common symptoms of the P01D8 code?

Symptoms may include rough idling, reduced engine performance, increased fuel consumption, misfiring, or the Check Engine Light being illuminated.

What causes the P01D8 code to appear on a 2017 GMC Sierra?

Possible causes include a failing fuel injector, a faulty camshaft position sensor, incorrect engine timing, or issues with the engine control module (ECM).

Can driving with the P01D8 code damage my 2017 GMC Sierra?

Yes, driving with advanced injection timing can cause engine damage over time, such as excessive wear or overheating, so it’s best to address the issue promptly.

How do you diagnose the P01D8 code?

A technician will use an OBDII scanner to verify the code, inspect the fuel injector and timing components, and check the camshaft position sensor for proper operation.

Can a dirty fuel injector cause the P01D8 code?

Yes, a dirty or clogged fuel injector can disrupt the injection timing and lead to the P01D8 code.

What repairs are typically needed to fix the P01D8 code?

Repairs may include cleaning or replacing the fuel injector, replacing the camshaft position sensor, adjusting the engine timing, or reprogramming the ECM.

Is the P01D8 code specific to GMC vehicles?

No, while the P01D8 code can appear on various vehicles, its interpretation and common causes can vary by manufacturer and model.

How much does it cost to fix the P01D8 code on a 2017 GMC Sierra?

The cost depends on the underlying issue, ranging from $150 to $500 or more, depending on whether you need a sensor replacement, injector cleaning, or timing adjustments.

Can I clear the P01D8 code with a scanner and continue driving?

Clearing the code without fixing the underlying problem may temporarily turn off the Check Engine Light, but the issue will likely return and could worsen over time.