P20FB — Reductant Pump B Control Performance/Stuck Off

What Does P20FB Mean?

P20FB is a diagnostic trouble code indicating: Reductant Pump B Control Performance/Stuck Off. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P20FB

⚠️ Check Engine Light (MIL) illuminated
⚠️ Reductant Pump B Control not meeting expected output
⚠️ Degraded performance of related system
⚠️ Reduced engine performance

Common Causes

🔍 Reductant Pump B Control degraded from age or contamination
🔍 Mechanical wear in Reductant Pump B Control or related parts
🔍 Restriction or blockage affecting Reductant Pump B Control
🔍 Calibration drift in Reductant Pump B Control

Frequently Asked Questions

What does P20FB mean?

P20FB indicates: Reductant Pump B Control Performance/Stuck Off. The vehicle's computer has detected that the Reductant Pump B Control is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P20FB?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P20FB for extended periods may cause additional problems.

How much does it cost to fix P20FB?

Repair costs for P20FB 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 Pump B Control for contamination or wear
🔧 Replace Reductant Pump B Control
🔧 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.

P20FB: Reductant Pump B Control Performance/Stuck Off