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General Car Chat / Re: fuel trim - jag x300
« on: 19 December 2012, 18:01:51 »
If I recall correctly it is an option only for someone with the right diagnostic equipment, however sometimes you can sort it yourself but not always by swapping the lambda sensor plugs over run the engine for a few minutes then swap them back, sometimes this will reset it for you but more often than not it doesn't work.
You could also try a hard reset of the ECU by disconnecting the negative lead from the battery and touching it to the positive for 10-30 seconds.
You could also try a hard reset of the ECU by disconnecting the negative lead from the battery and touching it to the positive for 10-30 seconds.