AutoCodes – GMC – P01D7 GMC

P01D7 GMC 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 GMC 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 470

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

What does this mean?

What are the Possible Causes of the DTC P01D7 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 P01D7 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 P01D7 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 P01D7 GMC code?

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

Need Help with the Code?

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

Information for Specific GMC Models

P01D7 2014 GMC Sierra — Cylinder 7 Injection Timing Retarded
P01D7 2015 GMC Sierra — Cylinder 7 Injection Timing Retarded
P01D7 2016 GMC Sierra — Cylinder 7 Injection Timing Retarded
P01D7 2017 GMC Sierra — Cylinder 7 Injection Timing Retarded
P01D7 2018 GMC Sierra — Cylinder 7 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 P01D7 GMC Code

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

P01D7 indicates that the injection timing for cylinder 7 is delayed or retarded beyond the acceptable range as detected by the engine control module (ECM).

2. What are the common symptoms of a P01D7 code on a GMC?

Symptoms may include rough idling, reduced engine performance, increased fuel consumption, engine misfires, or a check engine light.

3. What can cause a P01D7 code to appear on a GMC vehicle?

Common causes include a faulty fuel injector, clogged fuel lines, a malfunctioning camshaft or crankshaft position sensor, or issues with the engine control module (ECM).

4. Can I drive my GMC with a P01D7 code?

While driving may be possible, it is not recommended as it could lead to further engine damage or poor performance. Address the issue promptly.

5. How is the P01D7 code diagnosed on a GMC?

A technician will use a scanner to read the code, inspect the fuel injector for cylinder 7, check sensor signals, and examine the timing system for any mechanical issues.

6. How do I fix a P01D7 code on a GMC?

Repairs may include cleaning or replacing the fuel injector, fixing any wiring or sensor issues, or adjusting the engine timing system.

7. Can a dirty fuel injector cause the P01D7 code on a GMC?

Yes, a dirty or clogged fuel injector can disrupt fuel delivery and cause the injection timing for cylinder 7 to be retarded.

8. How much does it cost to repair a P01D7 code on a GMC?

Repair costs vary depending on the root cause, but it typically ranges from $150 to $500, including diagnostics and part replacement.

9. Could a bad ECM cause a P01D7 code on a GMC?

Yes, a malfunctioning ECM that fails to properly control fuel injection timing can trigger this trouble code.

10. How can I prevent the P01D7 code from recurring on my GMC?

Regular maintenance such as timely fuel system cleaning, replacing fuel filters, and ensuring sensors and wiring are in good condition can help prevent this issue.