P1338
Cylinder 1 Glow Plug Offset Exceeded Learning Limit
P1338 is an OBD-II diagnostic trouble code meaning: Cylinder 1 Glow Plug Offset Exceeded Learning Limit. Common causes: faulty glow plug in cylinder 1, open or short circuit in the glow plug circuit. Estimated repair cost: $17–56.
Symptoms
- Problems starting the engine, especially in cold weather
- Unstable engine operation after starting
- Increased exhaust smoke
- Check Engine Light Illuminates
- Reduced engine power
Causes
- Faulty glow plug in cylinder 1
- Open or short circuit in the glow plug circuit
- Glow plug relay problems
- Engine control unit malfunction
- Poor contact in the glow plug connectors
How to Fix
- Check the resistance of the glow plug in cylinder 1
- Inspect the spark plug power circuit for damage
- Check the operation of the glow plug relay
- Scan the control unit for other errors
- Replace faulty glow plug if necessary
Related codes
Error P1338 by Vehicle Brand
FAQ
What does the P1338 code mean?
P1338 is an OBD-II diagnostic trouble code that indicates: Cylinder 1 Glow Plug Offset Exceeded Learning Limit
What causes a P1338 error code?
The most common causes of P1338 include: Faulty glow plug in cylinder 1; Open or short circuit in the glow plug circuit; Glow plug relay problems; Engine control unit malfunction.
How do I fix a P1338 diagnostic trouble code?
To fix P1338: Check the resistance of the glow plug in cylinder 1. Inspect the spark plug power circuit for damage. Check the operation of the glow plug relay. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1338?
Yes, but get it checked soon
How much does it cost to fix P1338?
The estimated repair cost for P1338 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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