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[familymad666]

Hi everyone,
         my managment light has come on and i have done the peddle test to get the fault codes 0155 0150 and 0159 i have looked at fault codes listed and believe it to be bank 2 sensor 1 but can not find one for 0159 . does anyone know which sensor this is so i can change the correct sensor any help will be greatfully recieved as always. :-?

[Welung666]

P0155 O2 Sensor Heater Circuit High Voltage (Bank 2 Sensor 1)
P0155 O2 Sensor Heater Circuit Low Voltage (Bank 2 Sensor 1)
P0155 O2 Sensor Heater Circuit Open (Bank 2 Sensor 1)
P0155 O2 sensor heater circuit malfunction (Bank 2 Sensor 1)

P0150 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)
P0150 O2 Sensor Circuit Slow Response (Bank 2 Sensor 1)
P0150 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)
P0150 O2 sensor circuit malfunction (Bank 2 Sensor 1)

P0159 Oxygen Sensor Circuit Slow Response (Bank 2, Sensor 2)

Q. is there a leak on the passenger side manifold/flexi pipe?

Check the wiring on the 2 lambda sensors on the passenger side (sensor 1 is closest to the engine ).

[familymad666]

Thank you for the reply i have today had the car on ramps and checked the wiring on both sensors and seam to be o.k a few weeks ago i had a sensor replaced as managment light was on then,did not find out which one until today it was the one after cat on passenger side . There was no leak on manifold so does this mean i have got to replace the the sensor before the cat , thanks for the help

[Welung666]

It looks like they changed the wrong sensor! Do you have the one they replaced? If not, go fetch it and move the new one up to pre-cat and re-fit the old one post-cat

[familymad666]

Thanks mate that garage will be seeing me on monday afterall these sensors are not cheap