P205D Fault Code

Reductant Tank Temperature Sensor Circuit High

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

The P205D fault code indicates an issue with the reductant tank temperature sensor circuit, which is reading a higher voltage than expected. This sensor is crucial for monitoring the temperature of the diesel exhaust fluid (DEF) stored in the reductant tank to ensure optimal performance and emissions control.

What are the symptoms of the P205D code?

Drivers may notice various symptoms associated with this fault code, which can include:

• Increased diesel exhaust fluid consumption
• Check Engine Light activated on the dashboard
• Potential reduced engine performance due to emissions control system engagement
• Warning messages related to exhaust fluid or emissions failure

What causes the P205D code?

Several factors can trigger this code, such as:

• A faulty reductant tank temperature sensor
• Damaged wiring or poor connections in the sensor circuit
• Short circuits within the circuit that leads to higher voltage readings
• Issues with the engine control unit (ECU) that misinterpret sensor data

How to fix P205D?

To resolve the P205D code, follow these steps:

• Start by inspecting the wiring and connectors related to the reductant tank temperature sensor for any signs of damage or corrosion.
• Check the sensor itself for faults and replace it if needed.
• Clear the fault code from the ECU and conduct a road test to see if the code reappears.
• In cases where the wiring is intact and the sensor is functioning properly, further investigation into the ECU settings or related engine components may be necessary.