heat light on v6 petrol staying on.help!!

[cheffy34]

hi,
now i don`t know if the light was due to the lambda sensor or the wire that goes to the cat,as i cleaned the lambda sensor connections and it hasn`t come back on today.the wire to the cat had been dangling down touching,but not connected to,the cat,so maybe it was making a connection/short or something?that is now tidied up out of the way.
thanks
jamie

If it's not connected Jamie the light doesn't come on

[manners]

No heat light anywhere on mine ABS light above the roof light? Is it a winter pack option?

[cheffy34]

Dunno, but can you do me favour manners have alook at your cat pipe for me and see if you have a sensor sticking out the side of it, what year is yours my light is bottom right hand side of the dash below the abs light only used to come on when you first started the motor then go out

[manners]

There's a sensor comming out of the top of the cat two wire one blue and one white does this help? mine's a new shape Sep'99

[cheffy34]

There's a sensor comming out of the top of the cat two wire one blue and one white does this help? mine's a new shape Sep'99

Long and thin wire type sensor with an elbow bend in it or short fat and stumpy, reckon yours could be different to mine:roll: it is newer than mine suppose tho

[manners]

No elbow its about 3/8" wide and 2" long or 10mm x 50mm

[mrs hogggman]

sorry manners,are you sure you`re looking at the cat and not the bit before?

[cheffy34]

No elbow its about 3/8" wide and 2" long or 10mm x 50mm

could be the lambda that is pre cat the thermo is in the middle of the cat can, Another member tells me his hasn't got it either on his v6

[manners]

sorry manners,are you sure you`re looking at the cat and not the bit before?

Bang on center of the cat not the pipe.

[cheffy34]

sorry manners,are you sure you`re looking at the cat and not the bit before?

Bang on center of the cat not the pipe.

the same but different, i tried to look on lush projects but the damn pass code has changed again

[manners]

Just had a look on lush projects does not show any sensors lambda or otherwise.

[apole]

Hi,

It depends on which model year you look at and at what section, I couldn't find mine for ages. It looks like the new shape bongos only have a lambda, whereas the others have both.

[New Forest Terrier]

Hi

My 95 V6 has the two sensors. Lambda before the cat and the heat sensor in the middle of the cat. No elbow both go straight down with no wires visable as they are both completely sleeved.

The single sensor on the later Bongo is probably a combined heat and Lambda. Both feed back into the ECU. Lambda for the O2 measurement and heat to monitor the working temperature of the cat.

My heat light is second row up and the side nearest the steering wheel. Comes on on start up and then goes out straight away. Possibly a check that the sensors are inputing to the EMS? The Volvo one does that.

If the heat sensor is not inputing it would lead to higher fuel consumption as the ECU will not register the catalyst has reached working temperature.

[cheffy34]

Top Banana Mr Terrier


Thanks

[dandywarhol]

A 4 wire lamda sensor is just a 2 wire one with additional feed and earth to heat up the sensor element to allow it to operate earlier.