Is there anyway to tell whether its the temp sender or thermostat

[mar_k]

When my stat went the temp would drop to almost nothing on the motorway,
Completely stuck open it was. I used a circoli stat to replace it and it worked fine ever since

[Wazzzer]

Sender is dual circuit, one tells the ECU the temp for fuelling purposes the other tells the gauge what to read.

Stat usually makes the car take ages to get to temp and drops during long runs if it's stuck open. If it's stuck shut you'll overheat in no time...

[dom]

Lol. It does sound like thermostat btw. They are cheap as chips. I picked one up from ECP for £6. I would get one and change it and then see where you are with things.

Do not buy a thermostat from ECP, it will not last long at all. Mine was less than 2 weeks before it failed.

[Bellend]

Lol. It does sound like thermostat btw. They are cheap as chips. I picked one up from ECP for £6. I would get one and change it and then see where you are with things.

Do not buy a thermostat from ECP, it will not last long at all. Mine was less than 2 weeks before it failed.

Buy a quality one from ECP if they do one. The cheaper range admittedly, as much as I rate ECP, are sh!t.

[WadGTI]

Sender is dual circuit, one tells the ECU the temp for fuelling purposes the other tells the gauge what to read.

Stat usually makes the car take ages to get to temp and drops during long runs if it's stuck open. If it's stuck shut you'll overheat in no time...

So in theory, If I am getting the cooling map error code, this should be cause by the temp sender?.

TBH,...I am wondering how the thermostat would cause a cooling map code to show up? as its mechanical rather than electrical? I reliease it would take a long time for the coolant to heat up with a stuck thermostat, however on a good long run, the temp of the coolant will hit and stay 90c?

Or am I just being silly?

Reason for saying this, I changed the temp sendor and still getting the ECO Cooling map code.

THanks

[WadGTI]

Actually guys, I have just answered my own question. Found this article on the net.

Some intresting reading on the cooling systems for our engines.

http://www.volkspage.net/technik/ssp/ssp/SSP_222.pdf

[dom]

Sender is dual circuit, one tells the ECU the temp for fuelling purposes the other tells the gauge what to read.

Stat usually makes the car take ages to get to temp and drops during long runs if it's stuck open. If it's stuck shut you'll overheat in no time...

So in theory, If I am getting the cooling map error code, this should be cause by the temp sender?.

TBH,...I am wondering how the thermostat would cause a cooling map code to show up? as its mechanical rather than electrical? I reliease it would take a long time for the coolant to heat up with a stuck thermostat, however on a good long run, the temp of the coolant will hit and stay 90c?

Or am I just being silly?

Reason for saying this, I changed the temp sendor and still getting the ECO Cooling map code.

THanks

When I had a cooling map fault code it was the thermostat at fault.

[Scott D]

same fault code as well when thermostat

temps went to 90 when idling but once on the move dropped to 70ish - stat stuck open.