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Your scanner says P0700 --- and then tells you nothing else. That's the whole problem. P0700 isn't a failure; it's the transmission computer asking the engine computer to turn on your dash light, while the code that actually names the broken part sits locked in a module your reader never opened. Here's how to get it out --- and what it really costs once...

Code P0151 indicates a low signal from Bank 2 Sensor 1, but the oxygen sensor itself may not be the cause. Learn how to locate the sensor, identify symptoms, inspect wiring and exhaust leaks, compare live data, choose the correct repair, and fix P0151 on a Ford F-150 using the LAUNCH X431 CRP919X BT.

The average check engine repair now runs $554 --- and labor costs jumped 51% in a single year. Meanwhile about half of drivers just ignore the light, because finding out what it means costs money too. That's the gap a car scanner closes. Here's the five-year math, built on CarMD and AAA data instead of guesswork.