Murano Z51, 2010. 2.5dci Error code P0546

[batamurano]

Please help, I have a Murano 2010. 2.5 dci (205,000 km) ... A month ago the check engine light came on and the error code is P0546 - Exhaust Gas Temperature Sensor, Sensor 1 Bank 1. After turning off the engine, the fan remains on for some  20-30 seconds, and only after a long drive.  The exhaust temperature sensor has been replaced with a new one, but the computer shows the same error again.  What could be the problem?