AutoCodes – GMC – P133D 2014 GMC Sierra

P133D 2014 GMC Sierra Code - Cylinder 6 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 6, Glow Plug 6 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: P133D 2014 GMC Sierra indicates Cylinder 6 Glow Plug Offset Exceeded Learning Limit.
Common causes: Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 6, Glow Plug 6 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 291

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 P133D 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 P133D 2014 GMC Sierra - Cylinder 6 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133D 2014 GMC Sierra Code - Cylinder 6 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133D 2014 GMC Sierra?

Perform Glow Plug Learn procedure
Faulty Glow Plug 6
Glow Plug 6 harness is open or shorted
Glow Plug 6 circuit poor electrical connection

How to Fix the DTC P133D 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 P133D 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 P133D 2014 GMC Sierra code?

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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 P133D 2014 GMC Sierra Code

1. What does the OBDII code P133D mean on a 2014 GMC Sierra?

P133D indicates that the cylinder 6 glow plug offset has exceeded the learning limit, meaning the engine control module (ECM) has detected an issue with the glow plug's performance or calibration.

2. What are the common symptoms of the P133D code on a 2014 GMC Sierra?

Symptoms may include difficulty starting in cold weather, reduced engine performance, illumination of the check engine light, and increased exhaust emissions.

3. What causes the P133D code to appear on a 2014 GMC Sierra?

Possible causes include a faulty glow plug, poor electrical connection to the glow plug, damaged wiring or harness, or an issue with the ECM's calibration or learning process.

4. Can I drive my 2014 GMC Sierra with the P133D code?

Driving with this code is possible but not recommended, especially in cold weather, as it may lead to starting issues or increased wear on the engine.

5. How do I diagnose the P133D code on a 2014 GMC Sierra?

Diagnosis involves checking the glow plug and wiring for cylinder 6, testing the electrical resistance of the glow plug, and ensuring proper communication with the ECM.

6. How do I fix the P133D code on a 2014 GMC Sierra?

Common repairs include replacing the faulty cylinder 6 glow plug, repairing damaged wiring or connectors, and clearing the code with a scan tool after the issue is resolved.

7. How much does it cost to fix the P133D code on a 2014 GMC Sierra?

Repair costs vary but typically range from $100 to $300, depending on whether the glow plug, wiring, or other components need replacement.

8. Can a faulty ECM cause the P133D code on a 2014 GMC Sierra?

While rare, a faulty ECM or improper calibration can cause this code. It's best to rule out the glow plug and wiring issues first.

9. What tools are needed to troubleshoot the P133D code on a 2014 GMC Sierra?

Basic tools include a digital multimeter for testing resistance and voltage, a scan tool to read and clear codes, and potentially a socket set to replace the glow plug.

10. How can I prevent the P133D code from recurring on my 2014 GMC Sierra?

Regular maintenance, including inspecting and replacing glow plugs as needed, checking electrical connections, and updating the ECM software when available, can help prevent recurrence.