The P2043 trouble code indicates a range or performance issue with the reductant temperature sensor circuit.
P2043 Reductant Temperature Sensor Circuit Range/Performance
Code symptoms P2043.
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 P2043.
1. Faulty reductant temperature sensor.
2. Wiring or connector issues in the sensor circuit.
3. Corrosion or contamination in sensor connectors.
4. Sensor circuit malfunction.
Code Solutions P2043.
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 sensor circuit for proper operation and repair as needed.