Dpf And Warning Lights But Sensor Bypassed

[78Portellen]

56 plate, T180

Following a HG repair a couple of weeks ago, there's occasional white smoke. DPF regen or fault suspected.

Two bottles of Forte cleaner this morning and off down the motorway. As soon as I hit 70, engine management, VSC and TRC lights came on (they have come on before when on the motorway, but disappeared when back to urban driving). No smoke evident... yet.

Found out that the DPF sensor is bypassed (by previous owner?), so how are the warning lights coming on? Is there another sensor? Are there any advantages to bypassing the sensor? Anyway, I'll put it back together and see what happens...

I'm sure the smoke will be back as well. What are the chances of needing a replacement DPF/CAT? Heard it's got to be dealer part but costs around £1300.

Thanks for your help!

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[TomdeGuerre]

Don't get too hung up on the question of how can i be getting the TRC/VSC warning lights on when the sensor has been disconnected. These warning lights can come on for a variety of reasons. To be honest it sounds as if your car has been messed about with before you bought it and you may have some trouble getting to the bottom of it.

Before you buy any more of the fuel treatments etc I suggest you start by reading this thread – all 10 pages of it. The OP went through umpteen what-could-be-wrong-permutations and I won’t even try to summarise what was done but it will give you an idea of what’s possibly involved and to be prepared.

http://www.toyotaownersclub.com/forums/topic/143220-dpf-failing-after-160k/

[78Portellen]

Don't get too hung up on the question of how can i be getting the TRC/VSC warning lights on when the sensor has been disconnected. These warning lights can come on for a variety of reasons. To be honest it sounds as if your car has been messed about with before you bought it and you may have some trouble getting to the bottom of it.

Before you buy any more of the fuel treatments etc I suggest you start by reading this thread – all 10 pages of it. The OP went through umpteen what-could-be-wrong-permutations and I won’t even try to summarise what was done but it will give you an idea of what’s possibly involved and to be prepared.

http://www.toyotaownersclub.com/forums/topic/143220-dpf-failing-after-160k/

Thanks mate. Much appreciated. Yeah I'm sure the previous owner (at least) knew it was duff before I parted with the cash.

I won't shout too loud but I think there's progress. Some smoke today but not much. Reconnected the sensor and the warning lights have gone. Just bolted down the motorway and back for 20 miles and seems OK. I'm guessing the HG job has somehow 'righted' the DPF/sensor problem and all is now well. Won't speak too soon though...

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[Heidfirst]

There was also someone else who bought an Avensis from an auction & was having problems with it smoking.

http://www.toyotaownersclub.com/forums/topic/166263-jan-2012-avensis-22-tr-d-4d-head-gasket-blown/page-1

[78Portellen]

Don't get too hung up on the question of how can i be getting the TRC/VSC warning lights on when the sensor has been disconnected. These warning lights can come on for a variety of reasons. To be honest it sounds as if your car has been messed about with before you bought it and you may have some trouble getting to the bottom of it.

Before you buy any more of the fuel treatments etc I suggest you start by reading this thread – all 10 pages of it. The OP went through umpteen what-could-be-wrong-permutations and I won’t even try to summarise what was done but it will give you an idea of what’s possibly involved and to be prepared.

http://www.toyotaownersclub.com/forums/topic/143220-dpf-failing-after-160k/

Hey Tom, thanks very much for the heads up.

I reckon that thread has all the info I need to get to the bottom of my problem.

I've tried the in-tank DPF cleaner but looks like I'll get the DPF taken off and cleaned and replace the hoses to/from the pressure sensor. All thanks to that guy Aurissimo who went to the trouble and expense of finding out exactly what caused the problem.

When I've had the job done, I'll report back.

Cheers,

Joe