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P133D 2017 GMC Sierra Code - Cylinder 6 Glow Plug Offset Exceeded Learning Limit

Quick Answer

The diagnostic trouble code P133D for a 2017 GMC Sierra indicates that the Cylinder 6 Glow Plug Offset has exceeded the learning limit. Common causes include Faulty glow plug in cylinder 6, Wiring issues in the glow plug circuit, Malfunctioning glow plug control module. 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
P133D 2017 GMC Sierra indicates Cylinder 6 Glow Plug Offset Exceeded Learning Limit.
Common causes
Common causes include Faulty glow plug in cylinder 6, Wiring issues in the glow plug circuit, Malfunctioning glow plug control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P133D 2017 GMC Sierra Description

The diagnostic trouble code P133D for a 2017 GMC Sierra indicates that the Cylinder 6 Glow Plug Offset has exceeded the learning limit. Glow plugs are essential components in diesel engines, especially during cold starts, as they heat the combustion chamber to aid in ignition. When the engine control module (ECM) detects that the glow plug offset for cylinder 6 has exceeded the learning limit, it means that the glow plug's performance is outside the expected parameters.

OBDII Code P133D 2017 GMC Sierra - Cylinder 6 Glow Plug Offset Exceeded Learning Limit
P133D 2017 GMC Sierra Code - Cylinder 6 Glow Plug Offset Exceeded Learning Limit

Common Causes of P133D 2017 GMC Sierra

  1. Faulty glow plug in cylinder 6
  2. Wiring issues in the glow plug circuit
  3. Malfunctioning glow plug control module
  4. ECM software issues
  5. Environmental factors such as extreme cold affecting glow plug performance

Symptoms of P133D 2017 GMC Sierra

  1. Difficulties starting the engine, especially in cold weather
  2. Rough idling or misfires
  3. Decreased fuel efficiency
  4. Increased emissions
  5. Illumination of the check engine light

How to Fix P133D 2017 GMC Sierra

  1. Diagnose the specific cause of the code using a diagnostic scanner to pinpoint the issue accurately.
  2. Inspect the glow plug in cylinder 6 for proper operation and replace if necessary.
  3. Check the wiring in the glow plug circuit for any damage or corrosion and repair as needed.
  4. Test the glow plug control module for proper function and replace if faulty.
  5. Clear the code from the ECM memory and perform a test drive to ensure the issue has been resolved.

Cost to Fix P133D 2017 GMC Sierra

The typical repair costs for addressing the P133D code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. Replacement glow plugs can range from $20 to $50 each, while a glow plug control module can cost between $100 and $200. Labor costs can vary, but on average, you can expect to pay between $200 and $500 for diagnosis and repair. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and labor rates at the repair shop. It's advisable to consult with a trusted mechanic for a more accurate cost estimate.

What does this mean?

Tech Notes for P133D 2017 GMC Sierra

If a Glow Plug was replaced, perform a Glow Plug Learn procedure with a Scan Tool.

Need more information about the P133D 2017 GMC Sierra 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 P133D 2017 GMC Sierra Code

1. What does the OBDII code P133D mean on a 2017 GMC Sierra?

P133D indicates that the offset for the glow plug in cylinder 6 has exceeded the learning limit, meaning the glow plug system is not behaving as expected during self-diagnostics.

2. What are the common symptoms of code P133D on a 2017 GMC Sierra?

Common symptoms include difficulty starting the engine in cold weather, a check engine light, reduced fuel efficiency, and possible misfires in cylinder 6.

3. What causes the P133D code to appear on my GMC Sierra?

Causes may include a faulty glow plug in cylinder 6, an issue with the glow plug control module, corroded or damaged wiring, or incorrect calibration of the control system.

4. Can I drive with the P133D code on my 2017 GMC Sierra?

While the truck may still run, prolonged driving with this code could lead to starting issues in cold conditions and potential damage to the engine due to inefficient combustion.

5. How do I fix the P133D code on a GMC Sierra?

Common fixes include replacing the faulty glow plug in cylinder 6, repairing or replacing damaged wiring, and reprogramming or recalibrating the glow plug control module if necessary.

6. How do I test the glow plug in cylinder 6 for the P133D code?

You can test the glow plug with a multimeter to check for continuity and resistance. A faulty glow plug will typically show no continuity or resistance out of the normal range (usually 0.5-2 ohms).

7. Is a faulty glow plug control module a possible cause of the P133D code?

Yes, a malfunctioning glow plug control module can send incorrect signals to the glow plugs, causing the offset limit to be exceeded.

8. Can a software update fix the P133D code on a 2017 GMC Sierra?

In some cases, a software update from the dealership may recalibrate the glow plug system and resolve the issue if no hardware faults are detected.

9. What tools do I need to diagnose the P133D code?

You’ll need an OBDII scanner, a multimeter, and possibly a diagnostic tool capable of testing the glow plug system and control module.

10. How much does it typically cost to repair a P133D code?

The cost can range from $50 to $200 for a single glow plug replacement, while more extensive repairs like control module replacement or wiring repairs can cost $300-$600 depending on labor and parts.

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