McLaren was forced to end its running after 51 laps on day three of pre-season testing due to a hydraulic leak.
Jenson Button was at the wheel of the MP4-31 on Wednesday and had enjoyed a largely productive morning following Fernando Alonso's 119 laps on Tuesday. However, the 2009 world champion then stopped at the end of the pit lane early in the afternoon, causing the pit lane to be closed while running continued on track.
Racing director Eric Boullier confirmed a hydraulic leak was the cause, and while he downplayed the severity of the stoppage at the time, McLaren was unable to run again and ended its day early.
Alonso will be back in the car on Thursday for the final day of the first test in Barcelona, though there is a threat of rain for the morning session.
Follow live coverage and timing from pre-season testing here
Who is driving when during the first pre-season test
GALLERY: Pre-season testing day three
Keep up to date with all the F1 news via Facebook and Twitter
Aston Martin arrives in Monaco this weekend with a fresh coat of paint on its…
Mohammed Ben Sulayem is not backing away from his vision for Formula 1's future. The…
Just days before the most emotional race weekend of his season, Charles Leclerc has reaffirmed…
Formula 1’s ongoing debate over its future power unit regulations remains unresolved after Tuesday’s F1…
Williams Racing has doubled down on its technology-first future with the appointment of Dr James…
The opening five races of the 2026 F1 seasons have offered Cadillac many valuable lessons,…