Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a sensor that checks the temperature of a special liquid used to clean the car's exhaust is not working right. It's saying the sensor is reading a temperature that's too low.
The P2044 code is triggered when the Engine Control Module (ECM) detects a low voltage signal from the reductant temperature sensor circuit, indicating that the sensor may be reporting a temperature lower than expected.
The reductant temperature sensor is part of the Selective Catalytic Reduction (SCR) system, which reduces emissions in diesel engines. This sensor monitors the temperature of the reductant (usually urea-based diesel exhaust fluid) to ensure proper operation. A low circuit signal can indicate issues such as a faulty sensor, wiring problems, or issues with the SCR system itself.
• Check Engine Light is on
• Possible reduction in engine performance
• Increased emissions
• Faulty reductant temperature sensor
• Damaged or corroded wiring or connectors
• Faulty Engine Control Module (ECM)
Reductant: A substance used in the SCR system to reduce emissions.
SCR: Selective Catalytic Reduction, a system used to reduce nitrogen oxide emissions in diesel engines.
• Use an OBD-II scanner to confirm the code.
• Inspect the reductant temperature sensor and wiring for damage or corrosion.
• Test the sensor using a multimeter for proper resistance values.
• Replace the reductant temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly inspect and maintain the SCR system.
• Ensure proper quality and level of diesel exhaust fluid.
• Perform routine vehicle diagnostics.
Sensor Issue
• Have the vehicle inspected by a professional mechanic.
• Avoid ignoring the Check Engine Light as it may lead to more serious issues.
• Regularly maintain the vehicle's emission system.
Check with the vehicle manufacturer for warranty coverage on emission-related components.
The P2044 code has been more common in diesel vehicles with SCR systems due to the complexity of emission control technologies.
Moderate – While not immediately critical, it should be addressed to prevent potential damage to the emission system.
Driving with a malfunctioning emission system may not comply with emission regulations and can lead to fines.
• Engine at operating temperature
• Vehicle in park with engine running
The reductant temperature sensor is typically located near the diesel exhaust fluid tank or along the SCR system's fluid lines.
Q: Can I drive with a P2044 code?
A: It's possible to drive, but it's recommended to fix the issue soon to avoid increased emissions and potential damage.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code after repairs are completed.
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