I have found numerous reasons that this Code P2187 could trigger the CEL. Your car probably has a rough idle to stall right? First do the cheapest fix first.
1. clean out your MAF sensor
2.Check for leaks in the Vaccum hoses around the throttle body and Air filter housing. and the intake manifold with carb cleaner. While doing this if your idle goes to normal you have found the leak.
3. Disconnect the negative battery cable to reset the code.
4.Check your purge valve.
5.Check the wiring for cracks in the connector to the MAF sensor.
6. If all of these things dont help you diagnose the problem DO NOT BUY AUTO PARTS UNLESS YOU ARE SURE THEY WILL FIX THE PROBLEM. Trust me I know. I am dealing with this right now. After work I will try to locate a vaccum leak. This is the last step that I have not checked.
It is: 3^7 = 2187
The LCM is 24057.
2187 > 0.0002187or2187 is greater than 0.0002187
1, 3, 9, 27, 81, 243, 729, 2187.
The GCF is 27.
The least common multiple of 135 , 405 , 2187 = 10,935
The Least Common Multiple (LCM) for 189 567 2187 is 15,309.
2187 !
Prime factorization of 297891 = 33 x 11 x 17 x 59 Prime factorization of 2187 = 37 gcd(297891, 2187) = 33 = 27.
Integers are rational.
2187%
10935