AutoCodes – GMC – P133E GMC

P133E GMC Code - Cylinder 7 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 7, Glow Plug 7 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: P133E GMC indicates Cylinder 7 Glow Plug Offset Exceeded Learning Limit.
Common causes: Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 7, Glow Plug 7 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 1,311

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 P133E 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 P133E GMC - Cylinder 7 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133E GMC Code - Cylinder 7 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133E GMC?

Perform Glow Plug Learn procedure
Faulty Glow Plug 7
Glow Plug 7 harness is open or shorted
Glow Plug 7 circuit poor electrical connection

How to Fix the DTC P133E 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 P133E 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 P133E GMC code?

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Information for Specific GMC Models

P133E 2014 GMC Sierra — Cylinder 7 Glow Plug Offset Exceeded Learning Limit
P133E 2015 GMC Sierra — Cylinder 7 Glow Plug Offset Exceeded Learning Limit
P133E 2016 GMC Sierra — Cylinder 7 Glow Plug Offset Exceeded Learning Limit
P133E 2017 GMC Sierra — Cylinder 7 Glow Plug Offset Exceeded Learning Limit
P133E 2018 GMC Sierra — Cylinder 7 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 P133E GMC Code

What does the OBDII code P133E mean for my GMC vehicle?

P133E indicates that the cylinder 7 glow plug offset has exceeded the learning limit, which means the engine control module (ECM) has detected a problem with the glow plug system related to cylinder 7.

What symptoms might I experience with code P133E?

Common symptoms include hard starting, rough idle, increased exhaust smoke, and a decrease in engine performance, especially in cold conditions.

What causes the P133E code to trigger?

The code can be triggered by a faulty glow plug in cylinder 7, issues with the glow plug control module, wiring problems, or a malfunctioning ECM.

Can I drive my vehicle with code P133E?

While it may be possible to drive the vehicle, it is not recommended as it can lead to further engine performance issues and may cause more damage in the long run.

How can I diagnose the P133E code?

Start by using an OBD-II scanner to confirm the code, then visually inspect the glow plug and associated wiring for damage. Testing the glow plug's resistance and checking the control module can also help pinpoint the issue.

What are the common repairs for P133E?

Repairs typically include replacing the faulty glow plug in cylinder 7, repairing any damaged wiring, or replacing the glow plug control module if necessary.

Is it possible that multiple glow plugs are affected when P133E is present?

Yes, if multiple glow plugs are failing or if there is a systemic issue with the glow plug control circuit, it may trigger similar codes alongside P133E.

How can I prevent the P133E code from recurring?

Regular maintenance of the glow plug system, including periodic checks and timely replacements of glow plugs, can help prevent the recurrence of this code.

Should I reset the code after repairs?

Yes, after completing the necessary repairs, you should clear the code with an OBD-II scanner to see if it returns, indicating if further issues exist.