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Ecu Code 54

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Hi again guys.

I got the knock sensor issue sorted out, but fault code 54 is now appearing which is a problem with the ECU afaik.

If this code is up does the ECU revert to a default "get you home" map? The car is a tad sluggish and not very easy on petrol. If I clear the code it reappears after about a minute of driving. This code probably covers a range of ECU faults, but are there any faults in particular that are more common?

I've checked all the usual things; ie water ingress, loose wiring and all seems to be in order. I would change the relay to see if it helps but I'm not sure which one it is

The ECU is a 355 and I've got no hope of finding one over here to test it against.





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