The P2045 trouble code indicates that the reductant temperature sensor circuit is detecting a high voltage condition.
P2045 Reductant Temperature Sensor Circuit High
Code symptoms P2045.
1. Malfunction indicator lamp (MIL) or Check Engine Light (CEL) illuminated.
2. Changes in exhaust emissions.
3. Reduction in fuel efficiency.
4. Decrease in engine performance.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P2045.
1. Faulty reductant temperature sensor.
2. Wiring or connector issues in the sensor circuit.
3. Corrosion or contamination in sensor connectors.
4. High voltage supply to the sensor circuit.
Code Solutions P2045.
1. Inspect the reductant temperature sensor and replace if faulty.
2. Check the wiring and connectors in the sensor circuit for damage, corrosion, or loose connections. Repair or replace as necessary.
3. Clean or replace sensor connectors if they are corroded or contaminated.
4. Test the voltage supply to the sensor circuit and repair as needed.