Temperature sensor

grayboots · 02-02-2010, 03:58 PM

Hi All,

My 1.8 zetec focus mk 1 has fault with the temperature display. I have bought a new sensor. Does anyone know where it lives. I was expecting to find it in the cylinder head or the thermostat housing ? any ideas

g

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FrOd · 02-02-2010, 04:17 PM

Under the bonnet slam panel.

pdfbt40 · 06-02-2010, 11:06 PM

FrOd is referring to the external temperature sensor for a trip computer.

The engine temperature sensor is at the back of the engine under the inlet manifold above cylinder 1. Its a cylinder head temperature (CHT) so can be changed without any coolant loss.

However, if it is faulty, it would probably have effected the engine running as much as the indicator. The dials in a Focus are not independent devices. They are driven by digital highway from the PCM. In the case of the temperature it even adjusts the CHT to give a coolant temperature for EOBD.

Martin

grayboots · 08-02-2010, 08:20 AM

Thanks martin. I see it now, and the broken wire thats shorting to the alternator pulley.
all sorted.
Thanks again

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02-02-2010, 04:17 PM	#2
FrOd Virgin Garage is empty, add now Trader Score: (0) Join Date: Dec 2009 Location: UK Posts: 2 Rep Power: 0	Under the bonnet slam panel.

06-02-2010, 11:06 PM	#3
pdfbt40 PassionFord Regular 2003 Ford Focus Trader Score: (0) Join Date: Mar 2005 Location: Guildford, Surrey Posts: 364 Rep Power: 7	FrOd is referring to the external temperature sensor for a trip computer. The engine temperature sensor is at the back of the engine under the inlet manifold above cylinder 1. Its a cylinder head temperature (CHT) so can be changed without any coolant loss. However, if it is faulty, it would probably have effected the engine running as much as the indicator. The dials in a Focus are not independent devices. They are driven by digital highway from the PCM. In the case of the temperature it even adjusts the CHT to give a coolant temperature for EOBD. Martin

08-02-2010, 08:20 AM	#4
grayboots Virgin Garage is empty, add now Trader Score: (0) Join Date: Feb 2010 Location: devon Posts: 2 Rep Power: 0	Thanks martin. I see it now, and the broken wire thats shorting to the alternator pulley. all sorted. Thanks again

08-02-2010, 08:20 AM
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