AutoCodes – GMC – P133B GMC

P133B GMC Code - Cylinder 4 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 4, Glow Plug 4 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: P133B GMC indicates Cylinder 4 Glow Plug Offset Exceeded Learning Limit.
Common causes: Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 4, Glow Plug 4 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 3,212

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 P133B 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 P133B GMC - Cylinder 4 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133B GMC Code - Cylinder 4 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133B GMC?

Perform Glow Plug Learn procedure
Faulty Glow Plug 4
Glow Plug 4 harness is open or shorted
Glow Plug 4 circuit poor electrical connection

How to Fix the DTC P133B 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 P133B 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 P133B GMC code?

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Need Help with the Code?

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Information for Specific GMC Models

P133B 2014 GMC Sierra — Cylinder 4 Glow Plug Offset Exceeded Learning Limit
P133B 2015 GMC Sierra — Cylinder 4 Glow Plug Offset Exceeded Learning Limit
P133B 2016 GMC Sierra — Cylinder 4 Glow Plug Offset Exceeded Learning Limit
P133B 2017 GMC Sierra — Cylinder 4 Glow Plug Offset Exceeded Learning Limit
P133B 2018 GMC Sierra — Cylinder 4 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 P133B GMC Code

1. What are the common symptoms of OBDII code P133B GMC (Cylinder 4 Glow Plug Offset Exceeded Learning Limit)?

The common symptoms include hard starting, rough idling, loss of power, and possible excessive smoke from the exhaust.

2. What can cause the OBDII code P133B GMC to trigger?

The code may trigger due to a faulty glow plug, a wiring issue in the glow plug circuit, or a problem with the engine control module.

3. How can I diagnose the Cylinder 4 Glow Plug Offset Exceeded Learning Limit code?

Diagnosis involves checking the glow plug in cylinder 4, inspecting the wiring for any damage, and using a scan tool to read the code and monitor the system.

4. What are the repair options for OBDII code P133B GMC?

Repair options include replacing the faulty glow plug, repairing any damaged wiring, and resetting the engine control module to clear the code.

5. Can I continue driving my vehicle with the Cylinder 4 Glow Plug Offset Exceeded Learning Limit code?

It is not recommended to drive the vehicle with this code active, as it can lead to further engine damage and poor performance.

6. How important is it to address the P133B GMC code promptly?

It is important to address the code promptly to prevent any potential damage to the engine and to ensure optimal performance of the vehicle.

7. Are there any maintenance tips to prevent the Cylinder 4 Glow Plug Offset Exceeded Learning Limit code from recurring?

Regularly inspecting and maintaining the glow plug system, as well as ensuring the glow plugs are functioning properly, can help prevent this code from recurring.

8. Can weather conditions affect the triggering of the P133B GMC code?

Extreme weather conditions, especially cold temperatures, can put more strain on the glow plug system and potentially lead to the code being triggered.

9. Is it possible for a DIY enthusiast to fix the Cylinder 4 Glow Plug Offset Exceeded Learning Limit issue?

Depending on your level of automotive knowledge and experience, you may be able to replace a faulty glow plug or repair a wiring issue associated with this code.

10. How long does it typically take to repair the OBDII code P133B GMC?

The repair time can vary based on the specific issue causing the code, but in general, it can take anywhere from 30 minutes to a few hours to diagnose and fix the problem.