AutoCodes – Generic – P133E

P133E Code - Cylinder 7 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 7, Glow Plug 7 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: P133E indicates Cylinder 7 Glow Plug Offset Exceeded Learning Limit.
Common causes: Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 7, Glow Plug 7 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 7,840

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 P133E 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 P133E - Cylinder 7 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133E Code - Cylinder 7 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133E?

Perform Glow Plug Learn procedure
Faulty Glow Plug 7
Glow Plug 7 harness is open or shorted
Glow Plug 7 circuit poor electrical connection

How to Fix the DTC P133E?

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 P133E 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 P133E code?

Need more information on how to fix the P133E code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P133E Buick — Cylinder 7 Glow Plug Offset Exceeded Learning Limit
P133E Cadillac — Cylinder 7 Glow Plug Offset Exceeded Learning Limit
P133E Chevrolet — Cylinder 7 Glow Plug Offset Exceeded Learning Limit
P133E GMC — Cylinder 7 Glow Plug Offset Exceeded Learning Limit

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 P133E Code

What does the OBDII code P133E mean?

The P133E code indicates that the glow plug offset for cylinder 7 has exceeded its learning limit, suggesting an issue with the glow plug or related components.

What are the common symptoms of code P133E?

Symptoms may include difficulty starting the engine, especially in cold weather, an illuminated check engine light, rough idling, or reduced engine performance.

What causes the P133E code to appear?

Common causes include a faulty glow plug in cylinder 7, wiring or connection issues, a malfunctioning glow plug control module, or carbon buildup around the glow plug.

Can I drive my vehicle with a P133E code?

Driving with this code is possible, but it may result in poor engine performance and difficulty starting in cold conditions. Itâ€™s best to address the issue promptly.

How do I diagnose a P133E code?

Diagnosis involves inspecting the cylinder 7 glow plug, testing its resistance, checking the wiring and connectors for damage, and verifying the operation of the glow plug control module.

How do I fix the P133E code?

Repairs may include replacing the glow plug in cylinder 7, repairing damaged wiring or connectors, cleaning carbon buildup, or replacing the glow plug control module if necessary.

How much does it cost to repair a P133E code?

The cost varies depending on the repair needed, but replacing a glow plug typically costs $100-$300, including parts and labor. More extensive repairs may cost more.

Can a faulty glow plug cause engine damage?

While a faulty glow plug itself wonâ€™t directly damage the engine, prolonged issues can affect cold starts and lead to additional wear on the starter or battery.

Is a P133E code specific to certain vehicles?

Yes, this code is more common in diesel vehicles equipped with glow plugs, as they rely on these components for proper cold-start operation.

How can I prevent a P133E code from recurring?

Regular maintenance, including inspecting and replacing glow plugs as needed, checking wiring connections, and addressing carbon buildup, can help prevent this code.