Sudden appearance of fault codes

[rmoconnor41]

The car had a number of air leaks that the local Z shed found and remedied.

Rough idle disappeared.

car stood for a while.

Started up today. Rough idle and these codes
P1140
P0170
P0173
P0156

Thoughts and advice gratefully received. Thanks

 

[AntStark]

Pretty much all point to a dead O2 sensor I think.

 

[rmoconnor41]

Pretty much all point to a dead O2 sensor I think.

Another job for next year

 

[AntStark]

It will have fixed itself by Spring

 

[Jam03]

The car had a number of air leaks that the local Z shed found and remedied.

Rough idle disappeared.

car stood for a while.

Started up today. Rough idle and these codes
P1140
P0170
P0173
P0156

Thoughts and advice gratefully received. ThanksView attachment 278059View attachment 278063

It’s the car’s way of punishing you for neglecting it

 

[AntStark]

Yes ..and for SORNing it

 

[colb]

Dead post cat sensor in the exhaust, high fuel trims that have reqached their maximum so you should hqave an eml lit up on the dash. The Maf code may be a result of the bad exhaust sensor and not the Maf itself.

 

[rmoconnor41]

Dead post cat sensor in the exhaust, high fuel trims that have reqached their maximum so you should hqave an eml lit up on the dash. The Maf code may be a result of the bad exhaust sensor and not the Maf itself.

The MAF is relatively new. I didn’t notice a dash light driving it over to winter storage yesterday.
Just noticed it dropping revs on cold start ( which it did before the shed fixed all the air leaks).
So worth replacing the post cat O2 sensor?
Thanks for your help
Richard

 

[colb]

Yes put a new post cat sensor in on bank 2 to start with the run the car up to temp but clear the codes first then rescan