AutoCodes – Cadillac – P133B Cadillac

P133B Cadillac 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 Cadillac 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 398

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P133B Cadillac 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 Cadillac - Cylinder 4 Glow Plug Offset Exceeded Learning Limit - AutoCodes.com — P133B Cadillac Code - Cylinder 4 Glow Plug Offset Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P133B Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac code?

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

Need Help with the Code?

Get the P133B Cadillac code diagnosed by a professional: Find a repair shop in your area

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 Cadillac Code

1. What are the common symptoms of OBDII code P133B in a Cadillac?

- Common symptoms include rough idling, poor engine performance, decreased fuel efficiency, and potential misfires in cylinder 4.

2. What does the OBDII code P133B "Cylinder 4 Glow Plug Offset Exceeded Learning Limit" mean?

- This code indicates that the Engine Control Module (ECM) has detected an issue with the glow plug system in cylinder 4 of the Cadillac, where the offset has exceeded the learning limit.

3. What are the possible causes of OBDII code P133B in a Cadillac?

- Possible causes include faulty glow plugs, wiring issues in the glow plug circuit, a malfunctioning glow plug control module, or ECM calibration errors.

4. How can I diagnose the OBDII code P133B in a Cadillac?

- Diagnosing this code typically involves inspecting the glow plugs and their wiring, checking the glow plug control module, and verifying the ECM calibration. A scan tool can be used to monitor live data and identify the specific issue.

5. Can I still drive my Cadillac with the OBDII code P133B present?

- While it may be possible to drive the vehicle with this code, it is not recommended as it can lead to further engine damage and decreased performance. It is best to address the issue promptly.

6. How can I repair OBDII code P133B in a Cadillac?

- Repairing this code may involve replacing faulty glow plugs, repairing damaged wiring, resetting the ECM learning limit, or recalibrating the glow plug control module. It is recommended to follow manufacturer guidelines for proper repair procedures.

7. Is it necessary to reset the OBDII code P133B after making repairs?

- Yes, it is important to clear the code using a scan tool after resolving the underlying issue. This will reset the ECM and allow for proper monitoring of the system.

8. Can a DIY enthusiast fix the OBDII code P133B in a Cadillac?

- Depending on the level of experience and knowledge, some DIY enthusiasts may be able to address this code by following repair guides and using the necessary tools. However, complex issues may require professional assistance.

9. How long does it typically take to repair OBDII code P133B in a Cadillac?

- The repair time can vary depending on the specific cause of the code and the extent of the issue. Simple repairs like replacing a glow plug may take a few hours, while more complex issues could require more time.

10. Will OBDII code P133B cause permanent damage to my Cadillac if left untreated?

- Ignoring this code can potentially lead to more severe engine problems over time, such as decreased performance and increased fuel consumption. It is recommended to address the issue promptly to prevent further damage.