P204E — Reductant Pressure Sensor Circuit Intermittent/Erratic

What Does P204E Mean?

P204E is a diagnostic trouble code indicating: Reductant Pressure Sensor Circuit Intermittent/Erratic. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P204E

⚠️ Check Engine Light (MIL) illuminated
⚠️ Reductant Pressure Sensor signal cutting in and out
⚠️ Related system working sometimes but not consistently
⚠️ Reduced engine performance

Common Causes

🔍 Loose or intermittent connection at Reductant Pressure Sensor
🔍 Wire chafing causing intermittent contact
🔍 Reductant Pressure Sensor failing under heat or vibration
🔍 Corroded connector pins with partial contact

Frequently Asked Questions

What does P204E mean?

P204E indicates: Reductant Pressure Sensor Circuit Intermittent/Erratic. The vehicle's computer has detected that the Reductant Pressure Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P204E?

Yes, P204E is generally safe to drive with in the short term. However, it should still be addressed to pass emissions testing and prevent potential secondary issues.

How much does it cost to fix P204E?

Repair costs for P204E typically range from $30 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 reseat all Reductant Pressure Sensor connectors
🔧 Repair chafed or damaged wiring in Reductant Pressure Sensor circuit
🔧 Replace Reductant Pressure Sensor if failing intermittently

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.

P204E: Reductant Pressure Sensor Circuit Intermittent/Erratic