When the check engine light illuminates on the dashboard, drivers along the Eastern Seaboard now pay the most for related car repairs, according to CarMD’s analysis of more than 145,000 vehicles needing check engine repairs in 2013. Drivers in North Carolina, which is home to the most visited Great Smoky Mountains National Park, paid the most in the nation to have the check engine light diagnosed and repaired, at an average cost of $426.45. From 2012 to 2013, drivers in North Carolina saw at 9.37 percent jump in repair costs, including a 4.76 percent increase in parts and 17.53 percent increase in labor costs. Rounding out the five most expensive sates are: Massachusetts (no. 2), Delaware (no. 3), New Jersey (no. 4) and Virginia (no. 5).

• U.S. Average: The average cost for check engine light-related repairs in the U.S. in 2013 was $392.49, Up 6.7 percent from $367.84 in 2012. The state closest to the U.S. average is North Dakota at $392.71, which is just pennies from the national mean.
• Up in Rank: Vermont moved from the state with the lowest repair costs to the no. 16 ranking, Up 47.89 percent from $269.72 to $398.90. Vermont drivers had an increase in pricey catalytic converter replacements and a drop in visits to the repair shop because of pesky, yet low cost gas cap troubles. Delaware moved from the five least to the five most expensive states with a 35.16 percent increase in average repair cost due in large part to a 45 percent increase in parts costs from increased volume of ABS and transmission replacements, among other repairs with more expensive parts.
• Down in Rank: Oregon dropped from the no. 10 to no. 35 most expensive state for car repairs with a 1.3 percent decrease in average repair costs bucking the national trend and joining Nebraska as the only two states that did not experience an increase in repair costs this past year. New Mexico, which moved 35 to no. 47 in rank with only a slight 2.06 percent increase in average repair costs, is another example of how higher repair costs are shifting from west to east.
• Labor and Parts Costs: South Dakota car owners paid the most ($183.46), while New Hampshire drivers paid the least ($143.53) in labor charges on average. Massachusetts paid the most for parts ($273.16), driven by a high percentage of transmission and hybrid-related parts replacements. Nebraska paid the least ($163.24) on average for check engine-related repair parts.
• Putting off Repairs has Impact: Some factors that contribute to repair costs include age and type of vehicle, repair type and difficulty, parts costs and labor rates. The most common check engine light repair is the replacement of a faulty oxygen sensor, which can negatively impact fuel economy by as much as 40 percent if ignored. In North Carolina, O2 sensors account for 7.83 percent of repairs at an average cost of $262 including $146 parts and $116 labor. In Nebraska, the O2 sensor accounts for 10.28 percent of repairs at an average cost of $235 for parts with $121 in parts and $114 in labor. A fairly pricey repair is the replacement of the catalytic converter, which tends to fail when another part such as an O2 sensor or spark plug is ignored for too long. In Nebraska, catalytic converter replacements rank seventh accounting for only 2.94 percent of repairs. Conversely, in more expensive North Carolina the catalytic converter ranks second with 7.47 percent of repairs at an average cost of $1,192.46.
• Hybrid Repair Costs: Although car repair costs are Up across most of the country, hybrid repair costs continue to trend down as the volume of hybrid vehicles and people trained to service them rise. The most affordable state for hybrid battery replacement repairs is Missouri at an average cost of $2,386.66 to replace a hybrid battery. The most expensive state in which to have a hybrid car battery in 2013 was Nevada at $3,977.05 on average.

CarMD’s ranking of the five states with the highest car repair costs in 2013

CarMD ranking of the five states with the lowest car repair costs in 2013:

State-by-State Ranking of Average Check Engine Light Car Repair Costs – 2013 
(Source: CarMD.com Corp., CarMD®Vehicle Health Index™)