Lotus will run their old exhaust on Day Two at Bahrain after issues with the new design damaged the E22.
Pastor Maldonado brought out the red flags a few minutes before the lunch break on Day One of the final pre-season test.
Lotus diagnosed an exhaust issue and spent the rest of the day trying to fix the problem before eventually confirming that Maldonado would not be taking to the track again.
"Unfortunately, our new specification exhaust system failed, causing a small amount of damage to the surrounding area of the car," revealed Trackside Operations Director Alan Permane.
"This stopped us running early due to the rectification work required.
"For tomorrow, we will run with our previous specification of exhaust and we do not expect to see any similar problems to those we saw today."
As a result, Maldonado was limited to just 31 laps and finished 5.309s down on pace-setter Sergio Perez.
"For sure it wasn't what we wanted today," he said.
"But we are all working very hard to make progress and I'm sure we'll have solutions quite soon as a team, and it's clear we have good potential and the car is not bad.
"We have had some problems but we are fixing them and we are making improvements with electronics and software every day we run."
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