engine coolant sensor singal too high

[m.r.davies]

hi all

my Engine management light has come on again
vag com is saying

Chassis Type: 1M - Seat Leon
Scan: 01,02,03,08,15,17,19,22,35,46,56

-------------------------------------------------------------------------------
Address 01: Engine
Controller: 1ML 906 032
Component: 1.8l R4/5VT 0001
Coding: 10510
Shop #: WSC 00000
VSSZZZ1MZ3R112825 SEZ7Z0C1915413
1 Fault Found:
16502 - Engine Coolant Temp. Sensor (G62): Signal too High
P0118 - 35-10 - - - Intermittent
Readiness: 0000 0000


My question is what do i need to do to make the light switch off, replace the sesnor?
Is this problem bad news?

Thanks

...also whilst scanning i got a diagloue box saying sorry this function requires registering vag com..... dont think that came up before, does that mean its found something which i need the full version to see?

 

[Santos_V]

The sensor could be fauly. You might want to replace it. They are very inexpensive.

Here's what the Ross-Tech Wiki says:
http://wiki.ross-tech.com/index.php/16502/P0118

16502/P0118 - Engine Coolant Temperature Sensor (G62): Signal too High

Possible Symptoms

* Difficulties with starting a cold engine.
* Starting the engine when engine is warmish or warm, idle rpm immediately is 1200 - 3000 rpm.
* RPM at idle is irregular.
* With all engine temperatures seldom idle rpm will vary between 900 - 1000 rpm.
* With engine warm (90 °C) the engine temperature suddenly drops (70 °C) and slowly comes back to 90 °C.
* Bad acceleration during warming up.
o Diesel: an indication is extreme long time burning time of the glow indication light.


Possible Causes

* The electrical signal coming from G62 is too low
* Wiring and/or connections faulty (short circuit?)
* Engine Coolant Temperature Sensor (G62) faulty


Possible Solutions

* Check wiring and connections
* Check / Replace Engine Coolant Temperature Sensor (G62)


Special Notes

* In MY 1995-2002 (?) in Europe at VW-cars the G2/G62 had the bad reputation of breaking down often. The default G2/G62 is black and all replacements are green.

 

[m.r.davies]

Thanks for this information its really helpful

So i need to check the wiring and connections, and if thats ok replace the coolant sensor.

Does anyone know how to check the wiring and connections? is there a tutorial out there or pics of where to look?

any advice appreciated

 

[m.r.davies]

ok i've found this article

http://www.audiworld.com/tech/eng66.shtml

is that one relevant?

 

[JiM001]

This error can caused these? :
-i have got only 0,65-0,67bar instead of the default 0,8bar
-my car hitch when it's cold

 

[JiM001]

http://www.wak-tt.com/tempsensor/tempsensor.htm