P1338 2014 Chevrolet Silverado Code - Cylinder 1 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 1, Glow Plug 1 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
- P1338 2014 Chevrolet Silverado indicates Cylinder 1 Glow Plug Offset Exceeded Learning Limit.
- Common causes
- Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 1, Glow Plug 1 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.
Code P1338 2014 Chevrolet Silverado Description
What are the Possible Causes of the DTC P1338 2014 Chevrolet Silverado?
- Perform Glow Plug Learn procedure
- Faulty Glow Plug 1
- Glow Plug 1 harness is open or shorted
- Glow Plug 1 circuit poor electrical connection
How to Fix the DTC P1338 2014 Chevrolet Silverado?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1338 2014 Chevrolet Silverado 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.
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Frequently Asked Questions about P1338 2014 Chevrolet Silverado Code
1. What does OBDII code P1338 mean on a 2014 Chevrolet Silverado?
P1338 indicates that the Cylinder 1 Glow Plug Offset has exceeded the learning limit, which may affect the engine's ability to start and operate efficiently, especially in cold conditions.
2. What are common symptoms of code P1338 on a 2014 Chevrolet Silverado?
Symptoms may include difficulty starting the engine in cold weather, rough idling, reduced fuel efficiency, and the check engine light being illuminated.
3. What causes code P1338 on a 2014 Chevrolet Silverado?
Common causes include a faulty glow plug, damaged wiring or connectors, an issue with the glow plug control module, or carbon build-up around the glow plug.
4. Can a faulty glow plug trigger code P1338?
Yes, a faulty or worn-out glow plug can cause the offset to exceed the learning limit, leading to this code.
5. How can I diagnose code P1338 on my 2014 Chevrolet Silverado?
Start by checking the glow plug for Cylinder 1, inspecting the wiring and connectors, and testing the glow plug control module for proper operation.
6. Is it safe to drive with code P1338 on a 2014 Chevrolet Silverado?
While the vehicle may still run, prolonged driving with this code can lead to harder starts in cold weather and potential damage to the engine's combustion system.
7. How do I fix code P1338 on a 2014 Chevrolet Silverado?
Repairs may involve replacing the Cylinder 1 glow plug, cleaning carbon deposits, repairing damaged wiring, or replacing the glow plug control module if it's faulty.
8. Can carbon build-up cause code P1338 on a 2014 Chevrolet Silverado?
Yes, excessive carbon deposits around the glow plug can interfere with its operation and trigger this code.
9. How much does it cost to repair code P1338 on a 2014 Chevrolet Silverado?
Repair costs vary but typically range from $100 to $300 depending on whether the glow plug, wiring, or control module needs replacement.
10. Will clearing the code P1338 fix the issue on a 2014 Chevrolet Silverado?
Clearing the code will remove it temporarily, but the underlying problem must be addressed to prevent the code from returning.
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