P1143 Nissan - sensor changed but error code still remains

Question

I have an error code P1143 HO2S1 (B1) on Nissan Micra 2003 1,2. I changed the sensor but the error code did not disappear? I do not think that there is a airleak, since the car runs and excelerates normally. All the wiring seems to be alright also. What do I should do next?

Answer 1

Hi there,

Here is a list of possible causes for a heated O2 sensor code.

P1143 NISSAN - Heated Oxygen Sensor 1 Lean Shift Monitoring Bank 1

Read more: https://www.autocodes.com/p1143_nissan.html