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Ford S-Max 2.0 TDCi 2012 - Code P242A Exhaus gas sensor 3 - Fixed #

Posted by Keith Brown on January 9, 2015, 12:13 pm

Year of Manufacture *: 2012
Engine Size and Code *: 2000tdci TXWA
( Optional ) Scanner Used: dec 3

This temp sensor is open circuit, Autodata only shows 2 sensors!

There are 3 on the dpf, the logical way to expose the culprit would be to look at live data however only 2 listed also launch only shows 2 in live data.

I can unplug 2 & live data does react how ever that dose not give me any confidence to "guess" on the other sensor
has anyone had this issue

Thanks in advance

Fixed #

Posted by Keith Brown on January 9, 2015, 6:55 pm, in reply to "ford s-max P242A exh gas temp sensor 3?"
Edited by board administrator January 14, 2015, 11:27 am

Turns out what i assumed to be a rear temp sensor was in fact a fuel vaporiser / small heater plug which is not pcm controlled

This is a constant learning curve :[

Keith

Re: ford s-max P242A exh gas temp sensor 3?RESOLVED

Posted by Dave Hill <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2783' width='330' height='300' border=0 style='border:none;'> on January 10, 2015, 3:11 pm, in reply to "Re: ford s-max P242A exh gas temp sensor 3?RESOLVED"

Hi Keith

""turns out what i assumed to be a rear temp sensor was infact a fuel vaporiser / small heater plug which is not pcm controlled ""

What does control it then?

Re: ford s-max P242A exh gas temp sensor 3?RESOLVED

Posted by keith brown <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1429' width='330' height='300' border=0 style='border:none;'> on January 13, 2015, 12:39 pm, in reply to "Re: ford s-max P242A exh gas temp sensor 3?RESOLVED"
Keith Brown

correction Dave it is controlled by ECM but is listed as, exhaust aftertreatment glow device!
its function is to reduce the fuelling measures required to re-gen and so avoiding oil dillution & the need for extended drive cycles to raise exh temp
it is literally a fuel line pre-filter with a glow plug & when required hey presto a big fire in your exhaust.
thanks for your nudge dave, sometimes a bit of self study is needed

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