Cylinder 4 Injection Pulse Offset Exceeded Learning Limit

Check these first

• A worn cylinder 4 injector forcing a large learned offset
• A compression or valve fault changing cylinder 4 combustion
• A cylinder 4 misfire masking the injector correction
• A control module unable to store the cylinder 4 learning value

What to do next

1. Scan all modules and read the cylinder 4 injection pulse offset
2. Compare the cylinder 4 offset to the other cylinders
3. Run a compression and leak down test on cylinder 4
4. Test the cylinder 4 injector for balance against the other injectors
5. Replace the cylinder 4 injector if the offset cannot be learned again
6. Clear the code and retest

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