Engine management light

[3toyo]

Hope everyone is well, I'm having a small issue with my 2.4 2005 Alphard, I keep getting the engine management light on after 10/30mins of driving, and a horrible smell in the cab, like exhaust fumes and runs little rough, having trouble getting it on a reader, i believe it could be the O2 sensor, it's looks like a £40 wonder off eBay and the wiring is something to be desired, I have a feeling it's getting hot/ operating temperature and cutting out as it's no genuine and butchered, has anyone had this before and what reader do you recommend, I have a few jap imports and would benefit from one

[starider]

Hi, recently had a similar problem.Towed our caravan back from Cornwall, the engine light came on, stopped for a few minutes started up light went out and stayed out until I had to put more power on an incline on the A30, light came on.Same problem as before so a careful drive home,no more light, but notice fuel consumption had increased.

Used the Alphard solo a few times after and same problem. Asked around and read Hand book which suggested oxygen/fuel ratio sensor may need replacing. Replaced it, the one before the 2nd Cat,much better, but still came on on occasions. Then the wife noticed a rattle from the exhaust, onto the 4 poster and found a rattle from the 2nd Cat.which sounded like the internals had disintegrated.Had a complete S/S exhaust fitted[Described and as shown in my recent post]. Couldn't fit a new after Cat sensor, as the new one I received had a wiring harness that was too short. When I get time I'll take off the old one and splice the old wiring onto the new wiring.

What I have found out since is that the 02-08 Alphards have 2 cats.One as part of the exhaust manifold,and one 1/3 of the distance from the front,this is because of the very strict polution laws in Japan.

Hope this helps.

[starider]

Sorry forgot to ask, have you got a copy of the driver/owner hand book.In English and very informative, especially when looking for fuses!

Look on forum for where to buy from.

[3toyo]

1 hour ago, starider said:

Hi, recently had a similar problem.Towed our caravan back from Cornwall, the engine light came on, stopped for a few minutes started up light went out and stayed out until I had to put more power on an incline on the A30, light came on.Same problem as before so a careful drive home,no more light, but notice fuel consumption had increased.

Used the Alphard solo a few times after and same problem. Asked around and read Hand book which suggested oxygen/fuel ratio sensor may need replacing. Replaced it, the one before the 2nd Cat,much better, but still came on on occasions. Then the wife noticed a rattle from the exhaust, onto the 4 poster and found a rattle from the 2nd Cat.which sounded like the internals had disintegrated.Had a complete S/S exhaust fitted[Described and as shown in my recent post]. Couldn't fit a new after Cat sensor, as the new one I received had a wiring harness that was too short. When I get time I'll take off the old one and splice the old wiring onto the new wiring.

What I have found out since is that the 02-08 Alphards have 2 cats.One as part of the exhaust manifold,and one 1/3 of the distance from the front,this is because of the very strict polution laws in Japan.

Hope this helps.

That literally sums up my experience, I will check everything you've mentioned, I thought the rattle might of been the VVTI , but didn't think of the exhaust, I will check, thank you

[starider]

I recently posted details and pictures of the stainless steel   exhaust I had fitted by a National chain of "agents" called Powerflow the work was beautifully done with all components in stainless steel.Have a look at the picture my wife took.I have been in and around the motor trade and eventually became a Secondary School teacher teaching 11 to 18 year olds Technology and Motor Vehicle Studies for many years. I been involved with motor vehicles for over 60years and now spend my retirement restoring classic cars[very slowly now a days].

Edited November 25 by starider

[dezufo]

16 hours ago, starider said:

Hi, recently had a similar problem.Towed our caravan back from Cornwall, the engine light came on, stopped for a few minutes started up light went out and stayed out until I had to put more power on an incline on the A30, light came on.Same problem as before so a careful drive home,no more light, but notice fuel consumption had increased.

Used the Alphard solo a few times after and same problem. Asked around and read Hand book which suggested oxygen/fuel ratio sensor may need replacing. Replaced it, the one before the 2nd Cat,much better, but still came on on occasions. Then the wife noticed a rattle from the exhaust, onto the 4 poster and found a rattle from the 2nd Cat.which sounded like the internals had disintegrated.Had a complete S/S exhaust fitted[Described and as shown in my recent post]. Couldn't fit a new after Cat sensor, as the new one I received had a wiring harness that was too short. When I get time I'll take off the old one and splice the old wiring onto the new wiring.

What I have found out since is that the 02-08 Alphards have 2 cats.One as part of the exhaust manifold,and one 1/3 of the distance from the front,this is because of the very strict polution laws in Japan.

Hope this helps.

the 2nd cat was fitted on the 2.4L to comply with the cold start emissions test which is not part of the uk mot

[3toyo]

7 minutes ago, dezufo said:

the 2nd cat was fitted on the 2.4L to comply with the cold start emissions test which is not part of the uk mot

In theory this could be removed and have no effect on MOT

[dezufo]

23 hours ago, 3toyo said:

Hope everyone is well, I'm having a small issue with my 2.4 2005 Alphard, I keep getting the engine management light on after 10/30mins of driving, and a horrible smell in the cab, like exhaust fumes and runs little rough, having trouble getting it on a reader, i believe it could be the O2 sensor, it's looks like a £40 wonder off eBay and the wiring is something to be desired, I have a feeling it's getting hot/ operating temperature and cutting out as it's no genuine and butchered, has anyone had this before and what reader do you recommend, I have a few jap imports and would benefit from one

Get an Ancel JP700 scanner or any other make that has the JOBD protocol, a lot of people fit universal 02 sensors where they have to wire the pins to suit the vehicle, that could be why your wiring is a mess, look for a Denso or Blueprint or FebiBilstein sensor

[dezufo]

1 minute ago, 3toyo said:

In theory this could be removed and have no effect on MOT

Yes, as long as you have a sensor pre & post the manifold cat

[3toyo]

On 11/25/2024 at 2:46 PM, dezufo said:

Get an Ancel JP700 scanner or any other make that has the JOBD protocol, a lot of people fit universal 02 sensors where they have to wire the pins to suit the vehicle, that could be why your wiring is a mess, look for a Denso or Blueprint or FebiBilstein sensor

I have a brand new 1 on its way from Toyota, it should be arriving quite soon, jp700, hopefully this will work with my MK4 supra, having a spot of bother with this as well 😒