P20EB — Reductant Control Module Power Relay De-Energized Performance - Too Late

What Does P20EB Mean?

P20EB is a diagnostic trouble code indicating: Reductant Control Module Power Relay De-Energized Performance - Too Late. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P20EB

⚠️ Check Engine Light (MIL) illuminated
⚠️ Reductant Control Module Power Relay De-Energized not meeting expected output
⚠️ Degraded performance of related system
⚠️ Reduced engine performance

Common Causes

🔍 Reductant Control Module Power Relay De-Energized degraded from age or contamination
🔍 Mechanical wear in Reductant Control Module Power Relay De-Energized or related parts
🔍 Restriction or blockage affecting Reductant Control Module Power Relay De-Energized
🔍 Calibration drift in Reductant Control Module Power Relay De-Energized

Frequently Asked Questions

What does P20EB mean?

P20EB indicates: Reductant Control Module Power Relay De-Energized Performance - Too Late. The vehicle's computer has detected that the Reductant Control Module Power Relay De-Energized is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P20EB?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P20EB for extended periods may cause additional problems.

How much does it cost to fix P20EB?

Repair costs for P20EB typically range from $50 to $400, 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 Reductant Control Module Power Relay De-Energized for contamination or wear
🔧 Replace Reductant Control Module Power Relay De-Energized
🔧 Address any related mechanical faults

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.

P20EB: Reductant Control Module Power Relay De-Energized Performance - Too Late