AutoCodes – GMC – P01D1 2016 GMC Sierra

P01D1 2016 GMC Sierra Code - Cylinder 4 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: P01D1 2016 GMC Sierra indicates Cylinder 4 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 176

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P01D1 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 P01D1 2016 GMC Sierra - Cylinder 4 Injection Timing Retarded - AutoCodes.com — P01D1 2016 GMC Sierra Code - Cylinder 4 Injection Timing Retarded

What does this mean?

What are the Possible Causes of the DTC P01D1 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 P01D1 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 P01D1 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 P01D1 2016 GMC Sierra code?

Need more information on how to fix the P01D1 2016 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 P01D1 2016 GMC Sierra Code

What does the OBDII code P01D1 mean for a 2016 GMC Sierra?

P01D1 indicates that the engine control module (ECM) has detected that the injection timing for cylinder 4 is retarded, meaning it is delayed beyond the expected range.

What are the common symptoms of the P01D1 code?

Symptoms may include rough idling, decreased fuel efficiency, reduced engine performance, hesitation during acceleration, and the illumination of the check engine light.

What causes the P01D1 code to appear?

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

How do you diagnose the P01D1 code on a 2016 GMC Sierra?

Diagnosis typically involves using an OBDII scanner to confirm the code, inspecting the wiring and connectors for cylinder 4, checking the fuel injector for proper function, and verifying the ECM’s operation.

Can you drive with the P01D1 code active?

While the vehicle may still be drivable, it is not recommended to ignore the code, as it can lead to reduced engine performance and potential long-term damage.

How can the P01D1 code be fixed?

Repairs may include replacing a faulty fuel injector for cylinder 4, repairing or replacing damaged wiring, recalibrating or replacing the ECM, or addressing any issues with the fuel delivery system.

What tools are needed to fix the P01D1 code?

Basic tools include an OBDII scanner, a multimeter for testing electrical connections, and possibly fuel system diagnostic tools to check fuel pressure and injector function.

Can a clogged fuel injector cause the P01D1 code?

Yes, a clogged or malfunctioning fuel injector in cylinder 4 can cause delayed injection timing, triggering the P01D1 code.

How much does it cost to repair the P01D1 code on a GMC Sierra?

The cost depends on the root cause. Replacing a fuel injector typically costs $200–$500, while addressing wiring issues or ECM replacement may vary in price.

What happens if the P01D1 code is not resolved?

If left unresolved, the P01D1 code may lead to poor engine performance, reduced fuel efficiency, misfires, and potential damage to other engine components over time.