P3488 — Cylinder 11 Exhaust Valve Control Circuit High

What Does P3488 Mean?

P3488 is a diagnostic trouble code indicating: Cylinder 11 Exhaust Valve Control Circuit High. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P3488

⚠️ Check Engine Light (MIL) illuminated
⚠️ Cylinder 11 Exhaust Valve reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ Reduced engine performance

Common Causes

🔍 Short to voltage in Cylinder 11 Exhaust Valve wiring harness
🔍 Corroded or water-damaged Cylinder 11 Exhaust Valve connector
🔍 Faulty Cylinder 11 Exhaust Valve outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does P3488 mean?

P3488 indicates: Cylinder 11 Exhaust Valve Control Circuit High. The vehicle's computer has detected that the Cylinder 11 Exhaust Valve is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P3488?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P3488 for extended periods may cause additional problems.

How much does it cost to fix P3488?

Repair costs for P3488 typically range from $20 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and repair Cylinder 11 Exhaust Valve wiring for short to voltage
🔧 Clean or replace corroded Cylinder 11 Exhaust Valve connector
🔧 Replace faulty Cylinder 11 Exhaust Valve

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P3488: Cylinder 11 Exhaust Valve Control Circuit High