AutoCodes – Chevrolet – P133C 2018 Chevrolet Silverado

P133C 2018 Chevrolet Silverado Code - Cylinder 5 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 5, Glow Plug 5 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: P133C 2018 Chevrolet Silverado indicates Cylinder 5 Glow Plug Offset Exceeded Learning Limit.
Common causes: Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 5, Glow Plug 5 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 336

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P133C 2018 Chevrolet Silverado 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 P133C 2018 Chevrolet Silverado - Cylinder 5 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133C 2018 Chevrolet Silverado Code - Cylinder 5 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133C 2018 Chevrolet Silverado?

Perform Glow Plug Learn procedure
Faulty Glow Plug 5
Glow Plug 5 harness is open or shorted
Glow Plug 5 circuit poor electrical connection

How to Fix the DTC P133C 2018 Chevrolet Silverado?

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 P133C 2018 Chevrolet Silverado 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 P133C 2018 Chevrolet Silverado code?

Need more information on how to fix the P133C 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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 P133C 2018 Chevrolet Silverado Code

What does the OBDII code P133C mean on a 2018 Chevrolet Silverado?

P133C indicates that the glow plug offset for cylinder 5 has exceeded the learning limit, signaling an issue with the glow plug system in that cylinder.

What are the symptoms of code P133C on a 2018 Chevrolet Silverado?

Common symptoms include difficulty starting in cold weather, rough idling, reduced engine performance, and the check engine light being illuminated.

What causes code P133C in a 2018 Chevrolet Silverado?

The code is typically caused by a faulty glow plug in cylinder 5, wiring issues, poor electrical connections, or a malfunctioning glow plug control module.

Can a bad glow plug trigger code P133C on a Silverado?

Yes, a failed or degraded glow plug in cylinder 5 can trigger this code as it affects the system's ability to maintain proper offset calibration.

How can I diagnose the P133C code on my 2018 Silverado?

Use an OBDII scanner to confirm the code, visually inspect cylinder 5â€™s glow plug and wiring for damage, and test the glow plugâ€™s resistance to verify functionality.

How do you fix code P133C on a 2018 Chevrolet Silverado?

Repair typically involves replacing the faulty glow plug, inspecting and repairing wiring or connectors, and resetting the code using an OBDII scanner.

Is it safe to drive with code P133C on a Silverado?

While it may still be drivable, ignoring the code can lead to harder starts in cold weather and potential damage to other engine components over time.

Do I need a professional mechanic to fix code P133C on my Silverado?

If you're comfortable working with electrical components, you may be able to replace the glow plug yourself. Otherwise, a professional mechanic can ensure proper diagnosis and repair.

Can the P133C code affect fuel efficiency?

Yes, unresolved glow plug issues can lead to incomplete combustion, which may reduce fuel efficiency and overall engine performance.

How much does it cost to repair code P133C on a 2018 Chevrolet Silverado?

Repair costs vary but typically range from $100 to $300 for parts and labor, depending on whether just the glow plug or additional components need replacement.