(Bloomberg) -- Ford Motor Co. cautioned that full-year earnings will be at the low end of its forecast as the carmaker struggles with warranty costs and supply disruptions tied to recent hurricanes.

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Adjusted earnings before interest and taxes this year will be about $10 billion, down from a previous outlook for as much as $12 billion, the company said Monday. Analysts had expected $10.6 billion.

The tempered outlook highlights the widening gap between the Dearborn, Michigan-based carmaker and competitors including cross-town rival General Motors Co. Tesla Inc. shares soared last week after reporting a blowout third quarter, while GM raised its full-year profit forecast for the third time this year.

“We need to move faster, bottom line, and warranty needs to be a big part of that,” Ford Chief Financial Officer John Lawler said on a conference call with analysts. “We need to accelerate our pace to outrun what our competitors are doing.”

Ford’s shares fell 6% in premarket trading Tuesday. The stock has already fallen 7% this year.

Third-quarter adjusted profit was 49 cents a share, matching analyst estimates. The quarterly results and updated outlook were “underwhelming,” Vital Knowledge analyst Adam Crisafulli said in a note to clients, “especially compared to the strong reports from GM and Tesla.”

Ford shares plunged in July after the automaker reported a surge in warranty costs that caused it to fall short of profit estimates. Chief Executive Officer Jim Farley has taken drastic action to remedy the issue, even forgoing near-term profit by holding thousands of new models in parking lots around Detroit for extra quality checks.

During a call with reporters, Lawler characterized the quarter as “solid,” pointing to revenue growing 5% to $46.2 billion. But he said the company continues to struggle with getting costs under control, especially the expense of repairing quality problems on its vehicles.

“Our warranty costs were a slight improvement” in the third quarter, Lawler said. “But it’s not as big as we would like to see and we’re going to continue to work for that to be a much bigger number.”

The ongoing cost challenges blunted signs of progress elsewhere.

The Ford Pro commercial business, which has been a solid source of profit, earned $1.8 billion before interest and taxes, up from $1.65 billion a year earlier. Sales of F-Series pickups, which Ford sells to many fleet buyers, rose 4.2% in the quarter to almost 200,000 vehicles.