I’ve been having some problems with cruise cutting out which is
often associated with an amber warning ‘‘engine failsafe mode’’ .
Last Thursday I was out and the cruise started playing up along
with the message so I swithced off the cruise and the warning
stayed on until I took my foot off the throttle pedal. Eventually
I get a red ‘‘restricted performance’’ warning which stayed on
whatever I did.
Anyway next day before going anywhere I attached my diagnositc port
to my laptop and checked for errors. All I got was P1226 which
points to the accelerator pedal and mechanical guard postion
sensors which are part of the throttle body.
In the test procedure the manual suggests replacing the TPS
(throttle position sensor), APP (mechanical guard sensor) and FTP
(fuel tank pressure sensor). I’m guessing the throttle body
sensors are the culprits so should get them changed asap.
Are the sensors on the throttle body available or do I have to
replace the whole unit? If so does anyone know the part numbers?
Many thanks
Barrie Dawson
Sydenham, London, England
1998 Sovereign V8 4.0–
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