P2044 Fault Code

Reductant Temperature Sensor Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2044 fault code indicates a problem with the reductant temperature sensor circuit in the vehicle. This sensor is responsible for monitoring the temperature of the reductant fluid used in selective catalytic reduction (SCR) systems. A low reading from this sensor can disrupt the emissions control process, leading to increased nitrogen oxide (NOx) emissions and potential engine performance issues. The fault may be triggered by a variety of factors, including wiring issues, a faulty sensor, or problems in the vehicle’s engine control module (ECM).

What are the symptoms of the P2044 code?

• Check Engine Light (CEL) illumination on the dashboard
• Poor engine performance and reduced power
• Increased fuel consumption
• Emissions system warning messages displayed
• Possible failure in vehicle emissions testing

What causes the P2044 code?

• Deteriorated or damaged wiring in the sensor circuit
• Malfunctioning reductant temperature sensor
• Issues with the engine control module (ECM)
• Corrosion or poor connections in the circuit
• Faulty installation or replacement of the SCR system components

How to fix P2044?

• Inspect the wiring and connectors for any signs of damage or corrosion and repair as necessary.
• Test the reductant temperature sensor for proper operation, replacing it if found faulty.
• Check the ECM for any fault codes or software issues that may need to be addressed.
• Ensure that the SCR system is installed correctly and functioning as intended.
• Clear the fault code and perform a road test to ensure the issue has been resolved.