3.2 P1621 error and also incoerrect temp showing HELP!!!

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Mar 14, 2008 | 01:36 PM

esse123

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3.2 P1621 error and also incoerrect temp showing HELP!!!

Hi new here,

Sorry for the long thread.

My car is a 1998 XJ3.2 straight six one of the last X300. It was sometimes reving high 1500-2000rpm but if I taped the throttle pedal the revs droped to 900rpm. also the pedal travel was not smooth, it was very stiff then suddenly goes.

I have now cleaned the throttle body butand it is now running ok on the revs but the temp is staying cold, well goes up and down as you drive along. I have already replaced the thermostat as I read this is what caused the Throttle body to become clogged in the first place.

Had it put on a scanner It is showing error P1621, he coudn't tell me any more as he was using a snapon OBD scanner, any one any ideas before I spend more on someone with a jag scanner.

It is coming up for an MOT and the emissions were high when I had it serviced is this due to the temp issue as the throttle body was running wrong?

Is the P1621 error even related to my issue?

Thanks for any help

Chris