See also:

Oil volume
...

CHECK ENGINE Malfunction indicatorlight
On-Board Diagnostics II (OBDII): As you drive, a computer called "OBDII" monitors your vehicle's engine, transmission, electrical and emission systems. The CHECK ENGINE light will light ...

Unlocking a channel
A channel's access code is required to unlock a channel. Unlock all channels This permanently removes all channels from the locked list and makes them available for selection. Temporarily unl ...