P1338
Cylinder 1 Glow Plug Offset Exceeded Learning Limit
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
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