AutoCodes – GMC – P133E 2018 GMC Sierra

P133E 2018 GMC Sierra 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 2018 GMC Sierra 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 240

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 2018 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 P133E 2018 GMC Sierra - Cylinder 7 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133E 2018 GMC Sierra Code - Cylinder 7 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133E 2018 GMC Sierra?

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 2018 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 P133E 2018 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 P133E 2018 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 P133E 2018 GMC Sierra Code

What does the OBDII code P133E mean on a 2018 GMC Sierra?

The P133E code indicates that the glow plug offset for cylinder 7 has exceeded the learning limit, meaning the engine control module (ECM) has detected an issue with the glow plug operation or its calibration.

What are the symptoms of a P133E code on a 2018 GMC Sierra?

Common symptoms include difficulty starting the engine, rough idle, decreased fuel efficiency, and the illumination of the check engine light.

What causes the P133E code to appear on a 2018 GMC Sierra?

Possible causes include a faulty glow plug for cylinder 7, damage to the glow plug wiring or connector, a malfunctioning glow plug control module, or incorrect calibration settings in the ECM.

Can I drive my 2018 GMC Sierra with a P133E code?

While it may be possible to drive with this code, prolonged operation can lead to reduced engine performance, increased emissions, and potential damage to other components. Itâ€™s best to address the issue promptly.

How do I diagnose the P133E code on my 2018 GMC Sierra?

Diagnosis typically involves inspecting the cylinder 7 glow plug, checking the glow plug wiring and connector for damage, testing the glow plug control module, and using a scan tool to review live data and recalibrate the ECM if needed.

How do I fix the P133E code on a 2018 GMC Sierra?

Repairs may include replacing the cylinder 7 glow plug, repairing or replacing damaged wiring or connectors, or recalibrating the ECM. In some cases, the glow plug control module may need to be replaced.

Is the P133E code specific to GMC vehicles?

While the code P133E is most commonly associated with GMC and other GM vehicles, its exact definition and troubleshooting steps can vary slightly across manufacturers.

How much does it cost to repair a P133E code on a 2018 GMC Sierra?

Repair costs vary depending on the root cause, but replacing a glow plug typically costs $100-$300, whereas glow plug control module repairs or replacements may range from $200-$500.

Can a faulty glow plug cause other problems besides the P133E code?

Yes, a faulty glow plug can lead to hard starting, misfires, increased emissions, and poor engine performance, especially in cold weather conditions.

What tools do I need to troubleshoot the P133E code on my 2018 GMC Sierra?

Youâ€™ll need an OBDII scan tool to retrieve and reset codes, a multimeter to test electrical components, and potentially a specialty tool to safely remove and install glow plugs.