P2044

Reductant Temperature Sensor A Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Reduced efficiency of the SCR system
Possible increase in fuel consumption
Engine power limitation (on some models)

Causes

Reagent temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in wiring connectors
Problems with the SCR control unit
Corroded contacts or damaged wiring

How to Fix

Check the continuity of the temperature sensor circuit
Inspect connectors and contacts for corrosion
Check the resistance of the temperature sensor
Replace temperature sensor if necessary
Check and, if necessary, update the software of the control unit

Related codes

P2045 P2046 P2047