In message , Michael Chare
writes
On 31/12/2019 11:46, Roger Mills wrote:
On 31/12/2019 11:27, Jim GM4DHJ ... wrote:
On 31/12/2019 08:56, Jim GM4DHJ ... wrote:
Five years ago I got a PO130 code when the car was running rough so I
replaced the bank 1 sensor 1.....yesterday I got the engine management
light and got a PO135* code for the sensor ... so the heater in the
sensor has gone....car is running fine I assume this will be an MOT
failure even though the car is running fine.....why the hell do they
fit heaters to these sensors just to gain some minor emissions crap
until the engine has heated up ?...

update... cancelled the fault code and the engine management light
hasn't come back on...fingers crossed it stays off.....
It's not unusual to get erroneous error codes which don't come back
once cleared. I had quite a few on my previous car - Volvo V70 - some
of which looked serious, but never were.

It can be a nuisance if the ECU switches to 'get you home' mode and the
car then does not run properly. Used to happen to my wife's Golf. By
the time you got to a VW garage the fault had cleared.

Our diesel Fiesta is not that clever. However, engine torque is much
reduced while the filter is being cleaned. On long trips it would remain
in this mode unless the engine is switched off and back on!

With careful use of the clutch, this can be done on the move:-)


--
Tim Lamb