P24D2 — Reductant Heater A Sense Circuit

What Does P24D2 Mean?

P24D2 is a diagnostic trouble code indicating: Reductant Heater A Sense 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 P24D2

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Reductant Heater A Sense readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in Reductant Heater A Sense circuit (damaged, chafed, or corroded)
🔍 Faulty Reductant Heater A Sense connector or terminal
🔍 Failed Reductant Heater A Sense
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P24D2 mean?

P24D2 indicates: Reductant Heater A Sense Circuit. The vehicle's computer has detected that the Reductant Heater A Sense is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P24D2?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P24D2 for extended periods may cause additional problems.

How much does it cost to fix P24D2?

Repair costs for P24D2 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 Reductant Heater A Sense wiring and connectors
🔧 Replace faulty Reductant Heater A Sense

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.

P24D2: Reductant Heater A Sense Circuit