Dodgy Lambda?

[andyoleary]

Afternoon all,

When a lambda sensor fails, would it usually stay at 0v or 1.5v? My #1 sensor is showing 0v all the while and is not switching at all...

Cheers

Andy

[yzf1070]

First check and make sure there is 12v on one of the wire cores, if so then your lambda is almost certainly goosed. If no 12v then check fuse and connectors, you could temporarily swop the connectors to see if the lambda is working or not. Don't forget to label the connectors to avoid getting them mixed up.

If you need a replacement get the proper type, Trackcar posted up a while back that the probes for the TVR are specials in order to handle the excessive heat soak.

[andyoleary]

many thanks Graham, I'll run through some diagnostics today and see how it goes.

Cheers

Andy

[Whitey]

the only thing I can add to this thread is my lambda's are wrapped in heatshield as below, dealer did it during engine install in 06. Don't know if all cars are like this or not.

[andyoleary]

Cheers Andrew,

I swapped them over this morning a few times and double-checked on the voltages/resistance/connections etc - certainly seems that #1 probe is knackered. (Finally) managed to take the blasted thing out..

Is that just your connectors that are heat-wrapped or does it go down right to the probe?

Ta

Andy

Edited by andytuscrr on Friday 12th September 22:34

[Whitey]

just the connectors are wrapped, a few cm more than you can see in the photo.

[nelly1]

The connectors tend to go a nice bubbly burnt colour due to their close proximity to the manifold.

The heat-proof wrap should have been standard...