P03CF — Cylinder 6 Pressure Variation High

What Does P03CF Mean?

P03CF is a diagnostic trouble code indicating: Cylinder 6 Pressure Variation High. This code relates to the ignition system system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P03CF

⚠️ Check Engine Light (MIL) illuminated
⚠️ Cylinder 6 Pressure Variation High not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ Engine misfires or rough running

Common Causes

🔍 Faulty Cylinder 6 Pressure Variation High
🔍 Wiring or connector issue in Cylinder 6 Pressure Variation High circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does P03CF mean?

P03CF indicates: Cylinder 6 Pressure Variation High. The vehicle's computer has detected that the Cylinder 6 Pressure Variation High is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P03CF?

Only short distances if absolutely necessary. P03CF affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix P03CF?

Repair costs for P03CF typically range from $80 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 Cylinder 6 Pressure Variation High and related wiring
🔧 Replace faulty Cylinder 6 Pressure Variation High

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.

P03CF: Cylinder 6 Pressure Variation High