P24E1 — NH3 Sensor Circuit

What Does P24E1 Mean?

P24E1 is a diagnostic trouble code indicating: NH3 Sensor 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 P24E1

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic NH3 Sensor readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in NH3 Sensor circuit (damaged, chafed, or corroded)
🔍 Faulty NH3 Sensor connector or terminal
🔍 Failed NH3 Sensor
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P24E1 mean?

P24E1 indicates: NH3 Sensor Circuit. The vehicle's computer has detected that the NH3 Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P24E1?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P24E1 for extended periods may cause additional problems.

How much does it cost to fix P24E1?

Repair costs for P24E1 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 NH3 Sensor wiring and connectors
🔧 Replace faulty NH3 Sensor

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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.

P24E1: NH3 Sensor Circuit