AutoCodes – GMC – P133F 2017 GMC Sierra

P133F 2017 GMC Sierra Code - Cylinder 8 Glow Plug Offset Exceeded Learning Limit

Quick Answer

The Glow Plug Control Module has not learned the glow plug offset values. Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 8, Glow Plug 8 harness is open or shorted. 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: P133F 2017 GMC Sierra indicates Cylinder 8 Glow Plug Offset Exceeded Learning Limit.
Common causes: Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 8, Glow Plug 8 harness is open or shorted.
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 188

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 Sep 30, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P133F 2017 GMC Sierra Description

The Glow Plug Control Module has not learned the glow plug offset values. If a glow plug has been replaced and the glow plug learn was not performed, or if the Glow Plug Control Module experiences an Electronically Erasable Programmable Read Only Memory (EEPROM) error or data corruption, this Diagnostic Trouble Code (DTC) to set. The DTC will be set if the glow plug hot resistance is outside a predefined threshold.

OBDII Code P133F 2017 GMC Sierra - Cylinder 8 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133F 2017 GMC Sierra Code - Cylinder 8 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133F 2017 GMC Sierra?

Perform Glow Plug Learn procedure
Faulty Glow Plug 8
Glow Plug 8 harness is open or shorted
Glow Plug 8 circuit poor electrical connection

How to Fix the DTC P133F 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 does this mean?

Code Tech Notes

If a Glow Plug was replaced, perform a Glow Plug Learn procedure with a Scan Tool.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P133F 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 P133F 2017 GMC Sierra code?

Need more information on how to fix the P133F 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 P133F 2017 GMC Sierra Code

1. What does the OBDII code P133F mean on a 2017 GMC Sierra?

P133F stands for "Cylinder 8 Glow Plug Offset Exceeded Learning Limit," indicating an issue with the glow plug's performance or calibration in cylinder 8.

2. What are the common symptoms of the P133F code on a 2017 GMC Sierra?

Common symptoms include difficulty starting in cold weather, rough idling, reduced engine performance, or an illuminated check engine light.

3. What causes the P133F code to appear on a 2017 GMC Sierra?

The primary causes include a faulty glow plug, poor electrical connections, carbon buildup on the glow plug, or a malfunctioning glow plug control module.

4. Can driving with the P133F code cause damage to my GMC Sierra?

Driving with this code may lead to poor cold-start performance and increased emissions, but itâ€™s not typically an immediate risk to the engine. However, prolonged neglect could cause further issues.

5. How do I diagnose the P133F code on my 2017 GMC Sierra?

Diagnosis involves checking the glow plug in cylinder 8 for proper function, inspecting electrical connections for corrosion or damage, and testing the glow plug control module.

6. How do I fix the P133F code on a 2017 GMC Sierra?

Repairs may include replacing the cylinder 8 glow plug, cleaning or replacing corroded connectors, or replacing the glow plug control module if itâ€™s found to be faulty.

7. How much does it cost to repair the P133F code?

The cost depends on the specific repair needed. Replacing a glow plug typically costs $100â€“$250, while a glow plug control module replacement may cost $300â€“$500, including labor.

8. Can I clear the P133F code without fixing the issue?

Clearing the code without fixing the underlying issue will likely cause the code to return and wonâ€™t resolve the performance problems.

9. Is the P133F code specific to the 2017 GMC Sierra?

While the P133F code is common in GMC and Chevrolet diesel trucks using Duramax engines, it specifically pertains to cylinder 8 glow plug issues in those vehicles.

10. How can I prevent the P133F code from recurring on my GMC Sierra?

Regular maintenance, such as inspecting the glow plugs and connectors, and using high-quality diesel fuel to reduce carbon buildup, can help prevent this issue.