Before '96 models, watch the Check Engine light flash. After about five seconds it will flash the digit number, there will be a short pause, it will flash the second digit, then there will be a longer pause before the next two-digit code flashes out. The last code will always be five flashes, short pause, five flashes. That's code 55 which just means "end of message".
On newer models the three-digit codes are displayed in the odometer readout.
Monday, February 27th, 2012 AT 11:22 PM