AutoCodes – Chevrolet – P133B 2016 Chevrolet Silverado

P133B 2016 Chevrolet Silverado Code - Cylinder 4 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 4, Glow Plug 4 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: P133B 2016 Chevrolet Silverado indicates Cylinder 4 Glow Plug Offset Exceeded Learning Limit.
Common causes: Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 4, Glow Plug 4 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 204

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 P133B 2016 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 P133B 2016 Chevrolet Silverado - Cylinder 4 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133B 2016 Chevrolet Silverado Code - Cylinder 4 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133B 2016 Chevrolet Silverado?

Perform Glow Plug Learn procedure
Faulty Glow Plug 4
Glow Plug 4 harness is open or shorted
Glow Plug 4 circuit poor electrical connection

How to Fix the DTC P133B 2016 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 P133B 2016 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 P133B 2016 Chevrolet Silverado code?

Need more information on how to fix the P133B 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P133B 2016 Chevrolet Silverado Code

What does the OBDII code P133B mean on a 2016 Chevrolet Silverado?

P133B indicates that the Cylinder 4 glow plug offset has exceeded the learning limit, meaning the glow plug system for that cylinder is not performing within acceptable parameters.

What are the common symptoms of code P133B?

Symptoms may include a check engine light, difficulty starting the engine in cold weather, reduced fuel efficiency, or rough idling.

What causes the P133B code to appear?

Common causes include a faulty glow plug in Cylinder 4, wiring issues such as damaged or corroded connectors, or problems with the glow plug control module.

Can I drive my Silverado with the P133B code?

While the vehicle may still be drivable, ignoring the issue can lead to harder starts in cold weather and potential damage to other engine components. Prompt attention is recommended.

How do I diagnose the P133B code?

Diagnosis typically involves scanning the vehicle for additional codes, testing the Cylinder 4 glow plug for proper resistance, inspecting the wiring and connectors, and verifying the operation of the glow plug control module.

What tools are needed to fix a P133B code?

You may need an OBDII scanner, a multimeter to test electrical components, and basic hand tools for removing and replacing the glow plug or related parts.

How can I fix the P133B code on my 2016 Chevrolet Silverado?

Repairs may involve replacing the faulty Cylinder 4 glow plug, repairing damaged wiring, cleaning corroded connectors, or replacing the glow plug control module if necessary.

How much does it cost to repair the P133B code?

Repair costs can range from $50 to $200 for a glow plug replacement, while more extensive repairs, such as module replacement, may cost $300 or more.

How can I prevent the P133B code from reoccurring?

Regular maintenance, including inspecting glow plugs and wiring for damage, can help prevent this code. Using high-quality diesel fuel can also reduce wear on the glow plug system.

Does the P133B code affect emissions?

Yes, a malfunctioning glow plug can lead to incomplete combustion, which may increase exhaust emissions and impact compliance with emissions standards.