Cel light on.

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
Robbie b
Neutral
Posts: 33
Joined: Sun Mar 22, 2020 9:01 am

Re: Cel light on.

Post by Robbie b » Tue Apr 04, 2023 4:57 pm

Ok I see.had it plugged in again and done a full vehicle scan which showed up a lot of faults but these were cleared and passed on the diagnostic tool but some remaind.central locking immobiliser steering colum air con but I'm not so stressed about that stuff.paddles don't work I've just noticed.
I have no cel on since cleared but i shall wait and see,I'd imagine it's in the post.

Robbie b
Neutral
Posts: 33
Joined: Sun Mar 22, 2020 9:01 am

Re: Cel light on.

Post by Robbie b » Wed Apr 12, 2023 4:39 pm

Back again.so cel light came back after a few days of driving.this is what showed up
P1455
P0420
P0430
P1423
P1411
P0741
01119
01592

Gregstv
3rd Gear
Posts: 273
Joined: Tue Oct 03, 2017 11:35 am

Re: Cel light on.

Post by Gregstv » Thu Apr 13, 2023 6:17 am

With all the faults you have, I would start looking at bad connections. Main fuses under the dash, water in the modules on the front floor under the carpet (TCM) Could be corroded connectors or something.

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Shoppinit
Cruising
Posts: 20300
Joined: Wed Dec 31, 2008 6:24 pm

Re: Cel light on.

Post by Shoppinit » Thu Apr 13, 2023 10:42 am

The ECU faults are secondary air injection and lambda sensor related. Also an EGT fault. They suggest to me a massive air leak in the SAI system, possibly the combiner valves, which might be causing the codes with the lambda and EGT sensor downstream.

The other are gearbox and torque converter faults. Typically, those faults you get when the gearbox is suffering a terminal failure. Those *could* be because of low ATF or blocked strainer, and those would be where I would check first, but with the sinking feeling that a gearbox replacement is probably looming.

The last one is air quality sensor for the heater. Nothing to worry about.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

Robbie b
Neutral
Posts: 33
Joined: Sun Mar 22, 2020 9:01 am

Re: Cel light on.

Post by Robbie b » Fri Apr 14, 2023 8:12 am

Secondary air system?(SAI) were would one find these combiner valves shopp?yes when I seen the code for transmission me hearth sank.this is a new code of late wasn't there before.hoping a fluid change might cure this but I'm doubtful,going by threads on here.i really think I bit of more than I can chew with this car.and the thing wouldn't start this morning even tho it has a relatively new battery.

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