2010 3ltr turbo diesel changing throttle positioning sensor/switch under dash.when i take it off to replace it ,does it have to reset for electrical values thanks andrew

Unfortunately this is a well known issue and well documented.

https://www.google.com/search?q=2010+Jaguar+XF+3+liter+Diesel.+Water+in+diesel+warning+light

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Replacing TPS will reset the light but will stay in memory until the computer is reset. For help to change throttle body sensor check out you tube :How To Install Replace Throttle Position Sensor Chevy Silverado GMC Sierra.

the limp mode is also activated by problem sensors in the transmission. Have the fault codes read again or have the system reset after replacing the faulty items.

Throttle position sensor is part of the throttle body assembly. It is not sold as a separate part. You need to replace the throttle assembly. Remove the intake tube, remove the 4 bolts and disconnect the electrical plug. It will need to be programmed by someone withe the Volvo Vida software.

if you have a code indicating a problem with the throttle pos sensor it will need replacing if not get the OBD read at a garage

Hi lux used to have a small hole in the dash cluster behind the sreering wheel about 1/16 in dia Push a piece of wire in that hole gently into the hole under it and the indicator resets. Check with the hand book and it will identify how to do ti,

Bit of a long shot, but check the output of the throttle position sensor with a multimeter.

Also, check that the low range switch isn't continually reporting that you are in low range. The gearbox computer adopts a VERY harsh shift pattern in low range, holding gears until approx. 3500 RPM and even then producing very hard shifts.

Try unplugging the connector that carries the low range sense signal from the transfer box under the vehicle and see if that makes a difference.

Above the Relay Panel is the Auxiliary Relay Panel. Has thirteen positions in it.
6 across the top, 7 across the bottom.

Across the bottom the Glow Plug Relay is the fourth one over from the left. It is Number 10.
(180)

there is no adjustment on these tps's it's a drive by wire system. If you don't know the vehicle, dont post!
there's 2 sensors contained in the pedal sensor, and one on the throttle plate shaft, more often than not, it's the pedal sensor, and if you replaced that, it's the other one or a loose connection. did you reset the computer after replacing the pedal?

sounds like an intermitant problem with the TPS (throttle position sensor) switch.gl