Cylinder 5 Exhaust Valve Control Circuit Performance

Where it lives

For P3438, start at the valve the description names. The description of P3438 puts it on cylinder 5.

Check these first

• A cylinder 5 exhaust valve control solenoid that moves but not as commanded
• A sticking or binding cylinder 5 exhaust valve
• Low or dirty engine oil affecting cylinder 5 exhaust valve control
• High resistance in the cylinder 5 exhaust valve control wiring
• Worn mechanical parts in the cylinder 5 exhaust valve control linkage

What to do next

1. Read the cylinder 5 exhaust valve control status on a scan tool
2. Compare the commanded and actual cylinder 5 exhaust valve control position
3. Check the engine oil level and condition
4. Test the cylinder 5 exhaust valve control circuit for added resistance
5. Replace the cylinder 5 exhaust valve control solenoid if the output stays skewed
6. Clear the code and retest

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