AutoCodes – GMC – P133D GMC

P133D GMC 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 GMC 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 4,247

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

What does this mean?

What are the Possible Causes of the DTC P133D GMC?

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 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 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 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 P133D GMC code?

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Need Help with the Code?

Get the P133D GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P133D 2014 GMC Sierra — Cylinder 6 Glow Plug Offset Exceeded Learning Limit
P133D 2015 GMC Sierra — Cylinder 6 Glow Plug Offset Exceeded Learning Limit
P133D 2016 GMC Sierra — Cylinder 6 Glow Plug Offset Exceeded Learning Limit
P133D 2017 GMC Sierra — Cylinder 6 Glow Plug Offset Exceeded Learning Limit
P133D 2018 GMC Sierra — Cylinder 6 Glow Plug Offset Exceeded Learning Limit

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 GMC Code

1. What are the common symptoms of OBDII code P133D GMC (Cylinder 6 Glow Plug Offset Exceeded Learning Limit)?

The common symptoms include rough idling, loss of power, decreased fuel efficiency, and an illuminated Check Engine Light.

2. What does the OBDII code P133D GMC indicate?

The code P133D indicates that the glow plug offset learning limit for cylinder 6 has been exceeded, which can result in performance issues in the engine.

3. What are the possible causes of OBDII code P133D GMC?

Possible causes include a faulty glow plug in cylinder 6, wiring issues, poor electrical connections, or a problem with the engine control module (ECM).

4. How can I diagnose the OBDII code P133D GMC?

Diagnosing the code involves using a diagnostic scanner to retrieve the code, checking the glow plug in cylinder 6 for proper function, inspecting the wiring and connections, and testing the ECM.

5. Can I still drive my vehicle with the OBDII code P133D GMC present?

It is not recommended to drive the vehicle with the code active, as it can lead to further damage to the engine components and potentially cause a breakdown.

6. How can I repair OBDII code P133D GMC?

To repair the code, you may need to replace the faulty glow plug in cylinder 6, repair any wiring or connection issues, or reprogram the ECM to reset the learning limit.

7. Is it safe to reset the OBDII code P133D GMC without addressing the underlying issue?

Resetting the code without addressing the root cause can temporarily turn off the Check Engine Light, but the issue will likely reoccur, leading to potential engine performance problems.

8. Can a DIY enthusiast fix the OBDII code P133D GMC at home?

Depending on your mechanical skills and tools available, you may be able to replace the glow plug or check the wiring yourself. However, more complex diagnostics and repairs may require professional assistance.

9. How much does it cost to repair OBDII code P133D GMC at a repair shop?

The cost of repair can vary depending on the exact cause of the issue and labor rates in your area. Replacing a glow plug or fixing wiring may range from $100 to $300, while ECM-related repairs can be more expensive.

10. How can I prevent OBDII code P133D GMC from occurring in the future?

Regular maintenance, such as checking and replacing glow plugs as needed, ensuring proper electrical connections, and addressing any engine performance issues promptly, can help prevent the code from reoccurring.