Cylinder 5 - Fuel Trim at Max Limit

Check these first

• A weak or clogged cylinder 5 fuel injector
• A vacuum leak at the cylinder 5 intake runner
• A faulty oxygen sensor
• Carbon buildup on the cylinder 5 intake valve
• Low fuel pressure at the rail

What to do next

1. Read the long and short term fuel trim on a scan tool
2. Run an injector balance test on cylinder 5
3. Smoke test the intake for a vacuum leak
4. Check the cylinder 5 intake valve for carbon
5. Check fuel pressure at the rail
6. Clear the code and retest

Look up another code