AutoCodes – GMC – P133F 2014 GMC Sierra

P133F 2014 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 2014 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 143

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 2014 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 2014 GMC Sierra - Cylinder 8 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133F 2014 GMC Sierra Code - Cylinder 8 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133F 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the P133F 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P133F 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2014 GMC Sierra Code

What does the OBDII code P133F mean on a 2014 GMC Sierra?

P133F indicates that the Cylinder 8 Glow Plug Offset has exceeded the learning limit, meaning the glow plug system is not operating within expected parameters for cylinder 8.

What are the common symptoms of code P133F in a 2014 GMC Sierra?

Common symptoms include difficulty starting in cold weather, rough idle, reduced engine performance, and the check engine light being illuminated.

What causes the P133F code on a 2014 GMC Sierra?

The code is typically caused by a faulty glow plug, poor electrical connections, wiring issues, control module problems, or excessive carbon buildup around the glow plug.

How do I diagnose the P133F code on my 2014 GMC Sierra?

Diagnose the issue by scanning for codes, inspecting the glow plug and wiring for cylinder 8, checking for carbon buildup, and testing the glow plug control circuit.

Can a bad glow plug cause engine damage if the P133F code is ignored?

While ignoring the code may not immediately damage the engine, prolonged issues can lead to harder starting, increased emissions, and potential wear on the engine due to improper combustion.

How can I fix the P133F code on my 2014 GMC Sierra?

Repairs may include replacing the glow plug on cylinder 8, cleaning carbon deposits, repairing wiring connections, or replacing the glow plug control module if necessary.

Is it safe to drive with the P133F code on my 2014 GMC Sierra?

While the vehicle may still be drivable, ignoring the code can lead to starting issues and reduced performance, especially in cold weather, so itâ€™s best to address it promptly.

What tools are needed to repair the P133F code on a 2014 GMC Sierra?

Youâ€™ll need an OBDII scanner, a multimeter, basic hand tools, and potentially a carbon cleaning kit to perform the necessary diagnostics and repairs.

How much does it cost to repair the P133F code on a 2014 GMC Sierra?

Repair costs can range from $100 to $300 for a glow plug replacement, while more extensive repairs, such as replacing the glow plug control module, could cost more.

Can I fix the P133F code on my 2014 GMC Sierra myself?

If you have experience with automotive repairs and the proper tools, you can attempt to replace the glow plug or address wiring issues yourself. However, complex diagnostics may require professional assistance.