P2D5A

Reductant Level Sensor A/B Correlation

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
SCR system fault message
Unpleasant exhaust smell

Causes

Reagent level sensor A or B is faulty
Open or short circuit in wiring
Level sensors are dirty
Problems with the SCR control module
Low quality AdBlue reagent

How to Fix

Check the level and quality of AdBlue reagent
Clean level sensor contacts
Check the integrity of the wiring to the sensors
Replace faulty level sensor
Flash or replace the SCR control module if necessary

Related codes

P2D59 P2D5B P2D5C