A growing number of police departments across the country are taking action over concerns that carbon monoxide fumes from Ford Explorer patrol vehicles are seeping inside the SUVs, potentially sickening officers.Several departments, including Portsmouth, N

Ford Motor Co. has begun repairing Ford Explorer SUVs in Austin, Texas, that were pulled off police duty because exhaust containing carbon monoxide was seeping into them. But the company faces lingering questions about the safety of thousands of other...