AutoCodes – Buick – P133F Buick

P133F Buick Code - Cylinder 8 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 8, Glow Plug 8 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: P133F Buick indicates Cylinder 8 Glow Plug Offset Exceeded Learning Limit.
Common causes: Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 8, Glow Plug 8 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 427

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 P133F Buick 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 P133F Buick - Cylinder 8 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133F Buick Code - Cylinder 8 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133F Buick?

Perform Glow Plug Learn procedure
Faulty Glow Plug 8
Glow Plug 8 harness is open or shorted
Glow Plug 8 circuit poor electrical connection

How to Fix the DTC P133F Buick?

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 P133F Buick 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.

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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 P133F Buick Code

What does the OBDII code P133F mean for a Buick vehicle?

The code P133F indicates that the cylinder 8 glow plug offset has exceeded the learning limit, which means the engine control module (ECM) has noted an abnormality in the glow plug operation for that cylinder.

What are the common symptoms associated with code P133F?

Common symptoms may include difficulty starting the engine, increased emissions, rough idling, or a decrease in engine performance, particularly in cold weather.

What could cause the P133F code to trigger?

Possible causes include a faulty glow plug for cylinder 8, issues with the glow plug control module, wiring problems, or a malfunctioning ECM.

How can I diagnose the issue related to the P133F code?

To diagnose the issue, start by checking for additional trouble codes, inspecting the glow plug and its wiring for damage or corrosion, and testing the glow plug itself for proper resistance.

What are some potential repairs for code P133F?

Repairs may include replacing the faulty glow plug, repairing any damaged wiring, replacing the glow plug control module, or reprogramming the ECM if necessary.

Can I drive my Buick if the P133F code is present?

While it may be possible to drive the vehicle, it's not recommended, as it can lead to poor engine performance and potential long-term damage. It's best to address the issue promptly.

Will clearing the P133F code fix the underlying problem?

Clearing the code will not fix the underlying issue. The root cause must be identified and repaired for the code to stay cleared after being reset.

How can I prevent the P133F code from returning after repairs?

To prevent the code from returning, ensure that proper maintenance is performed on the engine, regularly check the glow plug system, and address any electrical issues promptly.

Is it safe to ignore the P133F code?

Ignoring the P133F code is not safe, as it can lead to starting issues and may affect overall engine performance, especially in cold temperatures. Addressing the issue is essential for reliable vehicle operation.