P28C0 — Ion Sense Module Supply Voltage Circuit

What Does P28C0 Mean?

P28C0 is a diagnostic trouble code indicating: Ion Sense Module Supply Voltage Circuit. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P28C0

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Ion Sense Module Supply Voltage readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in Ion Sense Module Supply Voltage circuit (damaged, chafed, or corroded)
🔍 Faulty Ion Sense Module Supply Voltage connector or terminal
🔍 Failed Ion Sense Module Supply Voltage
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P28C0 mean?

P28C0 indicates: Ion Sense Module Supply Voltage Circuit. The vehicle's computer has detected that the Ion Sense Module Supply Voltage is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P28C0?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P28C0 for extended periods may cause additional problems.

How much does it cost to fix P28C0?

Repair costs for P28C0 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 and repair Ion Sense Module Supply Voltage wiring and connectors
🔧 Replace faulty Ion Sense Module Supply Voltage

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.

P28C0: Ion Sense Module Supply Voltage Circuit