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P1337 Chevrolet Code - Glow Plug Offset Not Learned

Quick Answer

The P1337 Chevrolet diagnostic trouble code indicates that the engine control module (ECM) has detected that the glow plug offset has not been learned. Common causes include Faulty glow plugs that need replacement, Wiring issues or corrosion in the glow plug circuit, Malfunctioning engine control module (ECM). 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 Chevrolet indicates Glow Plug Offset Not Learned.
Common causes
Common causes include Faulty glow plugs that need replacement, Wiring issues or corrosion in the glow plug circuit, Malfunctioning engine control module (ECM).
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 10, 2024
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Code P1337 Chevrolet Description

The P1337 Chevrolet diagnostic trouble code indicates that the engine control module (ECM) has detected that the glow plug offset has not been learned. Glow plugs are essential components in diesel engines that help with cold starts by heating the combustion chamber. When the glow plug offset is not learned, it means that the ECM is unable to accurately control the timing of the glow plug operation, which can lead to difficulties starting the engine, reduced performance, and increased emissions.

OBDII Code P1337 Chevrolet - Glow Plug Offset Not Learned
P1337 Chevrolet Code - Glow Plug Offset Not Learned

Common Causes of P1337 Chevrolet

  1. Faulty glow plugs that need replacement.
  2. Wiring issues or corrosion in the glow plug circuit.
  3. Malfunctioning engine control module (ECM).
  4. Poor electrical connections in the glow plug system.
  5. Software issues preventing the ECM from learning the glow plug offset.

Symptoms of P1337 Chevrolet

  1. Difficulty starting the engine, especially in cold weather.
  2. Prolonged cranking times before the engine starts.
  3. Reduced engine performance and power output.
  4. Increased emissions and decreased fuel efficiency.

How to Fix P1337 Chevrolet

  1. Diagnose the issue by using a scan tool to retrieve and interpret the trouble codes.
  2. Inspect the glow plugs and wiring for any signs of damage or corrosion.
  3. Replace any faulty glow plugs and repair any damaged wiring.
  4. Perform a relearn procedure to reset the glow plug offset in the ECM.
  5. Clear the trouble codes from the ECM and test the vehicle to ensure the issue has been resolved.

Cost to Fix P1337 Chevrolet

The typical repair costs for addressing a P1337 Chevrolet code can vary depending on the extent of the issue and the specific components that need to be replaced. Generally, replacing faulty glow plugs and repairing wiring issues can cost anywhere from $200 to $500, including parts and labor. However, additional costs may apply if the ECM needs to be replaced or reprogrammed. It's important to consult with a certified mechanic or dealership for a more accurate estimate based on your specific vehicle make and model. Keep in mind that labor rates can vary, so it's advisable to check local rates for a more precise cost estimate.

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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 Chevrolet Code

1. What are the common symptoms of OBDII code P1337 in a Chevrolet related to "Glow Plug Offset Not Learned"?

The common symptoms include rough idling, decreased engine performance, and potential difficulty starting the vehicle.

2. What can cause the OBDII code P1337 in a Chevrolet related to "Glow Plug Offset Not Learned"?

Possible causes for this code include a faulty glow plug, issues with the glow plug control module, or a problem with the engine control module (ECM).

3. How serious is the OBDII code P1337 in a Chevrolet related to "Glow Plug Offset Not Learned"?

While the code itself may not cause immediate harm to your vehicle, it can lead to performance issues and potential starting problems if left unresolved.

4. Can I continue driving my Chevrolet with the OBDII code P1337 related to "Glow Plug Offset Not Learned"?

It is generally not recommended to drive your vehicle with this code present, as it can impact engine performance and potentially lead to further damage if not addressed promptly.

5. How can I repair the OBDII code P1337 in my Chevrolet related to "Glow Plug Offset Not Learned"?

Repair options may include checking and replacing faulty glow plugs, inspecting the glow plug control module for issues, and resetting the ECM to relearn the glow plug offset.

6. Will resetting the ECM clear the OBDII code P1337 in my Chevrolet related to "Glow Plug Offset Not Learned"?

Resetting the ECM may temporarily clear the code, but it is important to address the underlying issue causing the code to prevent it from recurring.

7. Can I diagnose the OBDII code P1337 in my Chevrolet related to "Glow Plug Offset Not Learned" at home?

While you can use an OBDII scanner to retrieve the code, diagnosing and repairing the specific cause of P1337 may require specialized knowledge and tools best handled by a professional mechanic.

8. How much does it typically cost to repair the OBDII code P1337 in a Chevrolet related to "Glow Plug Offset Not Learned"?

The cost of repair can vary depending on the exact cause of the code, but it may involve parts replacement, labor costs, and potential diagnostic fees, so it's advisable to get a quote from a trusted mechanic.

9. Are there any preventive measures to avoid the OBDII code P1337 in my Chevrolet related to "Glow Plug Offset Not Learned"?

Regular maintenance, such as checking and replacing glow plugs at recommended intervals, can help prevent issues that may trigger this code.

10. How long does it take to repair the OBDII code P1337 in a Chevrolet related to "Glow Plug Offset Not Learned"?

The repair time can vary based on the specific cause of the code and the complexity of the fix. It's best to consult with a mechanic to get an accurate estimate of the repair duration.

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