AutoCodes – Chevrolet – P133A 2018 Chevrolet Silverado

P133A 2018 Chevrolet Silverado Code - Cylinder 3 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 3, Glow Plug 3 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: P133A 2018 Chevrolet Silverado indicates Cylinder 3 Glow Plug Offset Exceeded Learning Limit.
Common causes: Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 3, Glow Plug 3 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 396

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 P133A 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 P133A 2018 Chevrolet Silverado - Cylinder 3 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133A 2018 Chevrolet Silverado Code - Cylinder 3 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133A 2018 Chevrolet Silverado?

Perform Glow Plug Learn procedure
Faulty Glow Plug 3
Glow Plug 3 harness is open or shorted
Glow Plug 3 circuit poor electrical connection

How to Fix the DTC P133A 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 P133A 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 P133A 2018 Chevrolet Silverado code?

Need more information on how to fix the P133A 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 P133A 2018 Chevrolet Silverado Code

1. What does the OBDII code P133A mean on a 2018 Chevrolet Silverado?

P133A indicates that the glow plug offset for cylinder 3 has exceeded the allowed learning limit, often due to an issue with the glow plug or related components.

2. What are the common symptoms of P133A in a 2018 Chevrolet Silverado?

Symptoms may include difficulty starting the engine in cold weather, a rough idle, decreased engine performance, or the check engine light being illuminated.

3. What causes the P133A code in a 2018 Chevrolet Silverado?

Common causes include a faulty glow plug in cylinder 3, damaged wiring to the glow plug, a malfunctioning glow plug control module, or carbon buildup affecting glow plug operation.

4. Can I drive my 2018 Chevrolet Silverado with a P133A code?

While the vehicle may still be drivable, prolonged operation with this code could lead to starting issues and potential engine damage. Itâ€™s best to address the issue promptly.

5. How do I diagnose the P133A code on a 2018 Chevrolet Silverado?

Diagnosis typically involves checking the glow plug in cylinder 3, inspecting the wiring and connections for damage, testing the glow plug control module, and verifying power and ground circuits.

6. How is the P133A code fixed on a 2018 Chevrolet Silverado?

Repairs may include replacing the faulty glow plug, repairing damaged wiring, cleaning carbon buildup, or replacing the glow plug control module if it's defective.

7. How much does it cost to fix a P133A code?

Repair costs can vary, but replacing a glow plug typically costs $150â€“$300, depending on labor rates and part prices. Wiring or module repairs may increase the cost.

8. Can a P133A code be caused by carbon buildup?

Yes, excessive carbon buildup around the glow plug in cylinder 3 can prevent it from functioning properly, potentially triggering the P133A code.

9. What tools are needed to troubleshoot the P133A code?

Diagnosing this code often requires an OBDII scanner, a multimeter for electrical testing, and possibly specialized tools for glow plug removal.

10. Does the P133A code affect emissions in the 2018 Chevrolet Silverado?

While not directly an emissions code, a malfunctioning glow plug can affect cold starts and lead to incomplete combustion, which may increase emissions over time.