AutoCodes – Chevrolet – P133D 2018 Chevrolet Silverado

P133D 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 1,180

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 P133D 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 P133D 2018 Chevrolet Silverado - Cylinder 6 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133D 2018 Chevrolet Silverado Code - Cylinder 6 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133D 2018 Chevrolet Silverado?

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 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 P133D 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 P133D 2018 Chevrolet Silverado code?

Need more information on how to fix the P133D 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 P133D 2018 Chevrolet Silverado Code

What does the OBDII code P133D mean on a 2018 Chevrolet Silverado?

P133D indicates that the glow plug offset for cylinder 6 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 common symptoms of code P133D in a 2018 Chevrolet Silverado?

Symptoms can include difficulty starting the engine, reduced performance in cold weather, a check engine light, or rough idling.

What causes the P133D code on a 2018 Chevrolet Silverado?

Common causes include a faulty cylinder 6 glow plug, wiring issues, a damaged glow plug control module, or incorrect calibration of the glow plug system.

Can I drive my 2018 Chevrolet Silverado with the P133D code?

While the vehicle may still be drivable, ignoring the issue can lead to harder starts in cold weather and potential long-term engine damage. It's best to address the problem promptly.

How can I diagnose the P133D code on my 2018 Chevrolet Silverado?

Diagnosis involves checking the cylinder 6 glow plug for damage, testing the wiring and connections, and verifying the operation of the glow plug control module. A scan tool may be needed to monitor the system.

How do I fix the P133D code on a 2018 Chevrolet Silverado?

Repairs could include replacing the cylinder 6 glow plug, repairing damaged wiring, or reprogramming the ECM if calibration is required.

Is the P133D code related to cold weather performance?

Yes, the glow plug system is critical for starting and running the engine in cold weather, so issues with cylinder 6 can affect cold starts and performance.

What tools are needed to troubleshoot the P133D code?

A scan tool capable of reading and clearing OBDII codes, a multimeter for checking electrical connections, and possibly a glow plug removal tool are typically required.

How much does it cost to fix the P133D code on a 2018 Chevrolet Silverado?

Repair costs can range from $100 to $400, depending on whether a glow plug, wiring repair, or module replacement is needed.

Can a P133D code cause long-term engine damage if not repaired?

While it may not cause immediate damage, prolonged issues with the glow plug system can lead to harder starts, increased emissions, and strain on the engine over time.