P20EB

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

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased fuel consumption
SCR System Error Message
Increased NOx emissions

Causes

Faulty reductant module power relay
Damage to the wiring harness to the module
Control module power problems
Malfunction of the reductant module itself
Short circuit in relay control circuit

How to Fix

Check the condition of the reductant module power relay
Check the integrity of the wiring harness and connections
Measure the voltage at the control module terminals
Replace the faulty relay if necessary
Test the operation of the system after repair

Related codes

P20EA P20E9 P20EE