AutoCodes – GMC – P01D5 GMC

P01D5 GMC Code - Cylinder 6 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: P01D5 GMC indicates Cylinder 6 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 298

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 P01D5 GMC 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 P01D5 GMC - Cylinder 6 Injection Timing Retarded - AutoCodes.com — P01D5 GMC Code - Cylinder 6 Injection Timing Retarded

What does this mean?

What are the Possible Causes of the DTC P01D5 GMC?

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 P01D5 GMC?

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 P01D5 GMC 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 P01D5 GMC code?

Need more information on how to fix the P01D5 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P01D5 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P01D5 2014 GMC Sierra — Cylinder 6 Injection Timing Retarded
P01D5 2015 GMC Sierra — Cylinder 6 Injection Timing Retarded
P01D5 2016 GMC Sierra — Cylinder 6 Injection Timing Retarded
P01D5 2017 GMC Sierra — Cylinder 6 Injection Timing Retarded
P01D5 2018 GMC Sierra — Cylinder 6 Injection Timing Retarded

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 P01D5 GMC Code

1. What does the OBDII code P01D5 mean on a GMC?

The P01D5 code indicates that the injection timing for cylinder 6 is retarded, meaning it is delayed beyond the optimal timing.

2. What are the symptoms of the P01D5 code on a GMC?

Symptoms may include rough engine idle, reduced fuel efficiency, poor acceleration, engine misfires, and possible illumination of the check engine light.

3. What causes the P01D5 code on a GMC?

Common causes include a malfunctioning fuel injector for cylinder 6, timing issues in the injector control module, wiring or connector problems, or a faulty engine control module (ECM).

4. Can driving with the P01D5 code damage my GMC engine?

Yes, prolonged driving with this code can lead to further engine damage due to improper fuel delivery and timing, which could cause misfires and increased wear on engine components.

5. How do I diagnose the P01D5 code on my GMC?

Diagnosis involves checking the injector for cylinder 6, inspecting wiring and connectors for damage, testing the injector control module, and reviewing live data with a scan tool to confirm timing issues.

6. What repairs can fix the P01D5 code on a GMC?

Repairs may include replacing the fuel injector for cylinder 6, fixing damaged wiring or connectors, reprogramming or replacing the ECM, or addressing issues in the injector control module.

7. Can a dirty fuel injector cause the P01D5 code?

Yes, a clogged or dirty fuel injector may delay fuel delivery, leading to the retarded injection timing indicated by the P01D5 code.

8. How much does it cost to fix the P01D5 code on a GMC?

Repair costs vary based on the issue, but replacing a single fuel injector typically costs $200â€“$500, while ECM repairs or replacements may cost $500â€“$1,500.

9. What tools are needed to diagnose the P01D5 code?

Tools include an OBDII scan tool, a multimeter for testing electrical connections, and possibly specialized equipment to test injector performance.

10. Can the P01D5 code be cleared without repairs?

Clearing the code without addressing the underlying issue may temporarily remove the check engine light but won't fix the problem, and the code will likely return.