AutoCodes – GMC – P0301 2016 GMC Sierra

P0301 2016 GMC Sierra Code - Cylinder 1 Misfire Detected

Quick Answer

A misfiring cylinder causes slight variations in the rotational speed of the crankshaft. Common causes include Faulty Spark Plug #1, Clogged or faulty Fuel Injector #1, Faulty Ignition Coil #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: P0301 2016 GMC Sierra indicates Cylinder 1 Misfire Detected.
Common causes: Common causes include Faulty Spark Plug #1, Clogged or faulty Fuel Injector #1, Faulty Ignition Coil #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 371

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 Jul 21, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0301 2016 GMC Sierra Description

A misfiring cylinder causes slight variations in the rotational speed of the crankshaft. The Engine Control Module (ECM) can detect these variations by closely monitoring the crankshaft position sensor signal. The signals of the camshaft position sensors are used to determine which cylinder is misfiring. If the ECM detects a misfire rate sufficient to cause emission levels to exceed mandated standards, the Diagnostic Trouble Code (DTC) will be set. Under certain driving conditions, a misfire rate can be high enough to cause the catalytic converter to overheat, damaging the converter. The Malfunction Indicator Lamp (MIL) flashes when the converter is overheating, damaging conditions are present, and the DTC is set. The DTC will be set when the ECM detects a crankshaft rotation speed variation indicating a single-cylinder misfire rate sufficient to cause emissions levels to exceed mandated standards.

OBDII Code P0301 2016 GMC Sierra - Cylinder 1 Misfire Detected - AutoCodes.com — P0301 2016 GMC Sierra Code - Cylinder 1 Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P0301 2016 GMC Sierra?

Faulty Spark Plug #1
Clogged or faulty Fuel Injector #1
Faulty Ignition Coil #1
Fuel Injector #1 harness is open or shorted
Fuel Injector #1 circuit poor electrical connection
Ignition Coil #1 harness is open or shorted
Ignition Coil #1 circuit poor electrical connection
Insufficient cylinder 1 compression
Incorrect fuel pressure
Intake air leak

How to Fix the DTC P0301 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 does this mean?

Code Tech Notes

The P0301 code means that cylinder #1 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder #1. If the problem persists more tests need to be done to diagnose the problem. See "Possible Causes" for the most common problems.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0301 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.

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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 P0301 2016 GMC Sierra Code

1. What does OBDII code P0301 on a 2016 GMC Sierra indicate?

The code P0301 indicates a misfire in cylinder 1 of the engine in a 2016 GMC Sierra.

2. What are common symptoms of a cylinder 1 misfire in a 2016 GMC Sierra?

Common symptoms include engine misfiring, rough idling, loss of power, and potentially increased fuel consumption.

3. What are possible causes of a cylinder 1 misfire in a 2016 GMC Sierra?

Common causes of a cylinder 1 misfire can include faulty spark plugs, ignition coil issues, fuel injector problems, vacuum leaks, or low compression in the cylinder.

4. How can I diagnose a cylinder 1 misfire in my 2016 GMC Sierra?

Diagnosing a cylinder 1 misfire typically involves checking the spark plugs, ignition coils, fuel injectors, compression levels, and vacuum lines for any issues.

5. How can I repair a cylinder 1 misfire in my 2016 GMC Sierra?

Repairing a cylinder 1 misfire may involve replacing spark plugs, ignition coils, fuel injectors, or addressing any vacuum leaks or compression issues in cylinder 1.

6. Can driving with a cylinder 1 misfire damage my 2016 GMC Sierra?

Continuously driving with a cylinder 1 misfire can potentially cause damage to the catalytic converter, oxygen sensor, or other components of the engine over time.

7. Is it safe to continue driving my 2016 GMC Sierra with a cylinder 1 misfire?

It is not recommended to drive your vehicle with a cylinder 1 misfire as it can lead to further engine damage and decreased performance.

8. How much does it typically cost to repair a cylinder 1 misfire in a 2016 GMC Sierra?

The cost of repairing a cylinder 1 misfire can vary depending on the specific cause, but it may range from a few hundred to a few thousand dollars, depending on the extent of the issue.

9. Can a DIY enthusiast fix a cylinder 1 misfire in a 2016 GMC Sierra?

Depending on the individual's mechanical skills and access to tools, some DIY enthusiasts may be able to fix a cylinder 1 misfire themselves by following repair guides and tutorials.

10. How often should I get my 2016 GMC Sierra inspected for potential cylinder misfires?

It is recommended to have your vehicle inspected regularly as part of routine maintenance to catch any potential cylinder misfires early and prevent further damage to the engine.