Honda has played down the severity of its early-season problems, saying it will not have a big impact on the development of its power unit.
The Japanese engine manufacturer has overhauled its power unit this season but has already encountered a series of issues during the opening days of testing. On Monday a problem with the design of the oil tank limited Fernando Alonso to 29 laps before a mechanical issue occurred on the replacement engine on day two.
Honda manufactured a new oil tank for day three, but the result of the investigation into the second issue is not expected to be concluded until Thursday -- at which point Honda will decide what to change for the second test.