Check Engine Light Statistics (2026): Repair Costs and Trends

If you are looking for check engine light statistics that are easy to cite, this page pulls together the latest U.S. numbers from CarMD, FHWA, AAA, NHTSA, and S&P Global Mobility in one place.

Quick takeaway: The average check engine light-related repair cost in the U.S. was $415.31 in calendar year 2024, down from $427.56 in 2023, based on more than 31 million failures and repair recommendations analyzed by CarMD in its 2025 report.

Key Check Engine Light Stats (U.S.)

Stat Latest Value Source

Average check engine light repair cost (2024) $415.31 CarMD, April 23, 2025

Average check engine light repair cost (2023) $427.56 CarMD, April 23, 2025

Year-over-year change in CEL repair cost -3% (2023 to 2024) CarMD, April 23, 2025

Labor cost change (CEL repairs) +1.4% (2024) CarMD, April 23, 2025

Parts cost change (CEL repairs) -5% (2024) CarMD, April 23, 2025

Vehicle warning light failures analyzed 31+ million CarMD, April 23, 2025

Average age of U.S. light vehicles 12.8 years (2025) S&P Global Mobility, May 21, 2025

U.S. light vehicles in operation 289 million S&P Global Mobility, May 21, 2025

U.S. motor-vehicle travel 3,246,817 million vehicle-miles (2023) FHWA Highway Statistics 2023 (VM-1)

Average miles traveled per registered vehicle 11,408 miles (2023) FHWA Highway Statistics 2023 (VM-1)

Safety recalls issued in 2024 1,073 recalls NHTSA, March 3, 2025

Vehicles recalled in 2024 29+ million vehicles NHTSA, March 3, 2025

Average annual cost to own and operate a new car $11,577 (2025) AAA Your Driving Costs, September 16, 2025

Maintenance, repair, and tires cost 11.04 cents per mile (2025) AAA Your Driving Costs, September 16, 2025

Top 10 Most Common Check Engine Light Repairs (2024)

These are the most common check engine light-related repairs and average total cost (parts plus labor) in CarMD’s 2025 Vehicle Health Index:

Rank Repair Average Cost

1Replace catalytic converter(s)$1,348 2Replace oxygen sensor(s)$254 3Replace ignition coil(s) and spark plug(s)$400 4Replace mass air flow sensor$323 5Replace EVAP canister purge control valve$144 6Replace ignition coil(s)$218 7Tighten or replace fuel capFree to tighten; $28 average to replace 8Replace fuel injector(s)$464 9Replace thermostat$254 10Reprogram powertrain control module$108

Free Sources You Can Cite (and Link)

Use these primary sources if you are writing your own article, report, or infographic:

• CarMD 2025 Vehicle Health Index press release (check engine light repairs)

• FHWA Highway Statistics 2023, Table VM-1 (vehicle miles traveled and average miles)

• NHTSA recalls week release (2024 recall counts)

• AAA Your Driving Costs 2025 summary

• S&P Global Mobility: average U.S. vehicle age in 2025

How To Use These Stats for Better Diagnostics

Cost data is most useful when you combine it with actual test results. Before replacing parts, pull trouble codes and verify the root cause:

• Use our OBD-II error code lookup to translate codes.

• Use our fuel trim interpreter when you suspect lean/rich mixture problems.

• Use our misfire code helper for P0300-P0312 diagnosis.

Important: A check engine light does not automatically mean the most expensive repair. CarMD’s top list shows the most common outcomes, not your guaranteed diagnosis.

Method Notes

• Dates and values are current as of February 8, 2026.

• CarMD values reflect U.S. check engine light-related failures and repairs in calendar year 2024, published April 23, 2025.

• FHWA VM-1 values are from Highway Statistics 2023 (updated March 2025).

• NHTSA recall counts reference calendar year 2024 and were published March 3, 2025.

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