Had a suspicion my glanza was running rich and using more fuel than necessary. Bought a replacement and went to fit it, and found the lambda switch had snapped at the wire coming from the ecu. Instead of re-wiring the standard plug back into position i crimped the wire from ecu to the lambda. However i'm not sure the lambda is working properly still, what are my options to find out? Suppose its either air/fuel check or take it to a garage?