EROR CODE P1166 , O/A SENSOR ,BUT WHICH 1 OUT OF THE 2 ,NEAR THE CAT OR NEAR THE MANAFOLD ?

Question

I have jest bought a Honda Accord 20,lits 2001 ,and the engine manager light is on and I was told that the car as been in and had a pug in p/c check and it is error code P1166 ,oxygen 02 lambda sensor ,but I was not told which one off the 2 ,would it be the sensor near to the cat or the one near the manifold ,?
Thank you
Regards
Edward

Answer 1

HI there

This code is for the heater on sensor 1. This is the sensor before the catalytic converter on bank 1. Here is some good info on it for you.

P1166 HONDA - Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction

Read more: https://www.autocodes.com/p1166_honda.html