Do you have a check engine light on? You can find out what the problem is with the $24 deal Amazon has on the Ancel Car Diagnostic Reader.

Already an affordable option, right now you can save over $25 on this diagnostic code reader from trusted brand Ancel.

The Actron PocketScan Code Reader works fine for very basic OBD-II scanning and is extremely easy to use, but its code-reading limitations make it useful for diagnosing only simple engine problems.

Engine diagnostic tool For years, every time I had a “check engine” light pop up I thought about plopping down $100 or more for an OBDII code scanner. I could never rationalize the cost of the the ...

If the car’s owner wants to know the code, they must purchase a code reader because a mechanic won’t tell them. How can you find out what the check engine light means? The check engine light could ...

Whether it's just from a routine scan or a result of a check engine light, discovering a P0171 could lead to various problems that have varying costs.