P0153 fault code?

[ben1000000]

Ford Focus 2006 1.6 Petrol, engine light came on diagnosed with a fault code P0153 02 Sensor Circuit Slow Response Bank 2 Sensor 1. Should I just start off replacing the sensor or maybe cleaning it up & has anyone experienced this fault before & what was the cause/solution?

[LordLoveLength]

You might want to read that again - a 1.6 focus doesn t have a bank2!

[ben1000000]

LordLoveLength said:

You might want to read that again - a 1.6 focus doesn t have a bank2!

Oh really? I don’t have a clue tbh that’s just exactly what the reader says.

[ARHarh]

ben1000000 said:

LordLoveLength said:

You might want to read that again - a 1.6 focus doesn t have a bank2!

Oh really? I don t have a clue tbh that s just exactly what the reader says.

It's true on both counts, the code says bank 2, a second bank will only happen on a v engine, or engine with a twin exhaust system. So a 1.6 focus will only have a bank 1.

Probably take another reading.

[vw_99]

Some 1.6 focus have a funky 4 branch manifold type thing. Is it a vvt engine?
They come 4 into 2 then into 1 after cat.

[ARHarh]

surely it would need 2 cats for a bank 2, I am just guessing though.

[vw_99]

Depending of what engine there are 2 cats.
The vct is a 4 branch into 2 each with a cat then into 1 that than joing "middle" section.

[ARHarh]

OK it seems it can be then, that setup really does look like over complicating something just because you can.

[vw_99]

Yup ford at there best.
Other 1.6 petrols of the time just had "normal" set up.
Just the vct/vvt engine had this set up.

[LordLoveLength]

If you have got that exhaust system then it looks like Ford are treating that engine as 2 twins as far as the ecu is concerned.
Sensor 1 is upstream of the cat and looking at the pics it looks like there are 2 upstream sensors. They should be the same so swap them and see if the fault moves.
Do not replace the faulty one with a generic eBay/amazon ‘universal’ type as they will be cheap Chinese garbage.
Get a decent brand from a reputable supplier.

[E-bmw]

LordLoveLength said:

If you have got that exhaust system then it looks like Ford are treating that engine as 2 twins as far as the ecu is concerned.
Sensor 1 is upstream of the cat and looking at the pics it looks like there are 2 upstream sensors. They should be the same so swap them and see if the fault moves.
Do not replace the faulty one with a generic eBay/amazon universal type as they will be cheap Chinese garbage.
Get a decent brand from a reputable supplier.

If it were me, I would buy either NTK, NTK or NTK.

[SystemOfAFrown]

ARHarh said:

OK it seems it can be then, that setup really does look like over complicating something just because you can.

I suspect they wanted the torque benefits of a tuned length 4-2-1 system, but a single cat at the end would be bad for light off times.

LordLoveLength said:

Do not replace the faulty one with a generic eBay/amazon universal type as they will be cheap Chinese garbage.
Get a decent brand from a reputable supplier.

I'll repeat this just in case the OP is tempted by the low prices of the useless crap sold on eBay/Amazon. Don't do it.