that means it you have a fault code and count it and makes sure.

0 - bank angle sensor, ECM, PGM-FI fuse
1 - MAP sensor
2 - MAP sensor vacuum hoses, or sensor itself
7 - ECT sensor poorly connected or open circuit
8 - TP sensor, TP senspr wiring
9 - IAT sensor connection, or open wire
10 - Baro sensor, or connection, or wiring
11 - Vehicle speed sensor, or connection or wiring
12 - #1 injector connection, or faulty injector
13 - #2 injectior connection or faulty injector
14 - #1 connection or open/shorted circuit
15 - #2 connection or open/shorted circuit
18 - Cam pulse sensor, connection or loose sensor
19 - Ignition pulse sensor, connection or loose sensor
20 - faulty E-PROM in ECM