P205A

Reductant Tank Temperature Sensor A Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased fuel consumption
SCR system error message on dashboard
Possible transition to emergency mode

Causes

Open or short circuit in the sensor circuit
Reagent temperature sensor malfunction
Poor contact in the sensor connector
Problems with the SCR control module
Crystallization of AdBlue reagent in the tank

How to Fix

Check the level and condition of the AdBlue reagent in the tank
Visually inspect the sensor circuit for damage
Check the resistance and voltage of the temperature sensor
Scan the ECU memory for other related codes
If necessary, replace the reagent temperature sensor

Related codes

P205B P208A P208B