AutoCodes – GMC – P1337 GMC

P1337 GMC Code - Glow Plug Offset Not Learned

Quick Answer

The Glow Plug Control Module has not learned the glow plug offset values. Common causes include Faulty Glow Plug Control Module, Glow Plug Control Module harness is open or shorted, Glow Plug Control Module circuit poor electrical connection. 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: P1337 GMC indicates Glow Plug Offset Not Learned.
Common causes: Common causes include Faulty Glow Plug Control Module, Glow Plug Control Module harness is open or shorted, Glow Plug Control Module circuit poor electrical connection.
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 1,434

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 Jul 25, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1337 GMC 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.

OBDII Code P1337 GMC - Glow Plug Offset Not Learned - AutoCodes.com — P1337 GMC Code - Glow Plug Offset Not Learned

What does this mean?

What are the Possible Causes of the DTC P1337 GMC?

Faulty Glow Plug Control Module
Glow Plug Control Module harness is open or shorted
Glow Plug Control Module circuit poor electrical connection

How to Fix the DTC P1337 GMC?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1337 GMC 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 P1337 GMC code?

Need more information on how to fix the P1337 GMC 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 P1337 GMC Code

1. What are the common symptoms of OBDII code P1337 GMC (Glow Plug Offset Not Learned)?

- Common symptoms may include hard starting, rough idling, decreased fuel efficiency, and potentially a Check Engine light.

2. What does the OBDII code P1337 GMC indicate?

- The code P1337 indicates that the ECM has not learned the offset value for the glow plug control module.

3. What are the possible causes of code P1337 GMC?

- Possible causes include a faulty glow plug control module, wiring issues, poor electrical connections, or a malfunctioning ECM.

4. How can I diagnose the cause of OBDII code P1337 GMC?

- Diagnose by checking the glow plug system for faults, inspecting wiring and connections, and using a scan tool to monitor the glow plug control module's data.

5. Can I still drive my vehicle with code P1337 GMC?

- It is not recommended to drive your vehicle with this code as it can lead to poor engine performance and potential starting issues.

6. How can I repair OBDII code P1337 GMC?

- Repair options include replacing the glow plug control module, repairing any wiring or connection issues, and clearing the code with a scan tool.

7. Is it possible to reset the code P1337 GMC without fixing the underlying issue?

- While you can clear the code with a scan tool, it is important to address the root cause to prevent the issue from reoccurring.

8. Can a DIY enthusiast fix OBDII code P1337 GMC at home?

- Depending on your skill level and tools available, some DIY enthusiasts may be able to diagnose and repair this code at home.

9. How much does it typically cost to repair OBDII code P1337 GMC at a mechanic?

- The cost of repair can vary depending on the exact cause, but it may range from $200 to $500 at a mechanic, including parts and labor.

10. Are there any preventive measures to avoid code P1337 GMC in the future?

- Regular maintenance of the glow plug system, checking for wiring issues, and ensuring proper electrical connections can help prevent code P1337 from appearing in the future.