[Corsa C 2000-2006] Lambda Sensors. Which to change???

[JonTurt]

Hi

Got a 1.0 12v Energy. Replaced exhaust recently and since then the orange check engine light has come on.

Did pedal test and got following codes

P0136 O2 Sensor Circuit (Bank 1 Sensor 2)

P0141 O2 Sensor Heater Circuit (Bank 1 Sensor 2)

Please can someone advise which sensor, pre or post CAT I should replace and cheapest/best place to buy it?

Many thanks

[Taurus]

Post CAT.

Ring Autovaux 01924 376003

[JonTurt]

Post CAT.

Ring Autovaux 01924 376003

Well it passed the MOT on the emissions after I reset the ECU by disconnecting the battery for a few hours.

Still a a mystery as to if it needs changing?!?

[Taurus]

Well it passed the MOT on the emissions after I reset the ECU by disconnecting the battery for a few hours.

Still a a mystery as to if it needs changing?!?

There's another mystery as well - disconnecting the battery on those doesn't reset the ECU. That only works on some of the older 8v engines. But so long as it's behaving itself who cares how and why!