Heat Warning Light On V6 after driving through water

[New Forest Terrier]

The heat warning light is staying on my V6 Bongo with LPG. I drove through some water, overflowing drain and the red heat light came on and has stayed on. Its been through far worse and deeper water in the past without a falter. All is running well, changing to LPG perfectly but the light is staying on. Hoping it might dry out but its rained almost solidly for the last three days.

Anyone any idea what the cause of this is and if so what to do about it. Wait for dry weather, replace the Lambda or has the catalyst died?

[mikeWalsall]

I have a V6 .. but do not have the light (and one as never been fitted) ..



it's usually to show the catalyser is over heated / blocked ..

Maybe in your case (blocked) full of water ..??

[Bob]

Shock cooling in flood water can embugrificate your cat.

[New Forest Terrier]

Thanks both of you. Sounds like an expensive new year present. Not even a full flood just a blocked drain that was deeper than it looked with oncoming traffic preventing avoiding it. Interesting that not all have a warning light.

[mikeWalsall]

I had my dash of to find the dealer had removed the ABS bulb / holder .. You can see where the 'tram lines' have cut into the printed circuit .. as opposed to the cat / heat light that is untouched ..

"embugrificate " even Google does not come up with an interpretation for that word ..!!

[Bob]

Written on good Somerset cider.

[Northern Bongolow]

it may just be the sensor or wiring to it mary, i had this on a scania last week,went to reduced power, the lot. i know ones petrol and the other diesel but it may be similar.


bloody weather. .

[New Forest Terrier]

Update. Took this to Discount Trucks on Thursday. Catalyst seems OK, its a sensor problem. Paul Horsfall found a fault code and cleared it. The beast then started running well and stopped guzzling. The catalyst light light was still on, until he disconnected the second sensor actually on the catalyst.

Mine being an early V6 has two sensors unlike most newer V6's which only have one. The lambda in front of the cat and a second sensor actually bolted into the body of the catalyst. This second sensor was causing the warning light to stay on. Not sure what this sensor does. Most V6's do not have it. It has been disconnected and the light is out and the Bongo seems to be running fine without it. So its a wait and see situation.

Anyone any ideas what this extra sensor does. Is it essential as most V6's do not have it. Hopefully it was an original idea which turned out not to be needed.

[Bob]

Good news she's running right.

[New Forest Terrier]

If all else fails its second hand parts from Japan. The second sensor has been discontinued for so long

[Northern Bongolow]

not too well up on the cats mary but there is a bit here on 1 or 2 sensors in this.

https://www.autohausaz.com/html/emissio ... nsors.html.

bit more stuff.

http://www.totalcardiagnostics.com/supp ... iagnostics

[Northern Bongolow]

looking more into this mary, i wonder if there was water around the dizzy/spark plug are which made the motor run on 1 or 2 cylinders down then the unburnt fuel went into the exhaust, just a thoery as to how it came about.

this gives it in basic speak.

http://www.ebay.co.uk/gds/Reasons-for-c ... 746/g.html

[haydn callow]

looking more into this mary, i wonder if there was water around the dizzy/spark plug are which made the motor run on 1 or 2 cylinders down then the unburnt fuel went into the exhaust, just a thoery as to how it came about.

this gives it in basic speak.

http://www.ebay.co.uk/gds/Reasons-for-c ... 746/g.html

That's exactly what happened to our MX5.......replacement 2hand cat complete with sensor fixed it.

[teenmal]

The sensor on the Cat is a heat Warning Sensor, this is to warn of Cat overheating and to stop (burning long grass etc).

Run you vehicle quite hard at night and have a look at the Cat if you can see its eyes you have a problem.

[New Forest Terrier]

Scary. Totally beyond my mechanical knowledge. E bay advertises a replacement Bongo cat which claims to replace both types. Where do I go from here?