Question Tom ,I am unable to get codes to appear on my 93 deVille , by pushing OFF and WARMER , simultaneously for 2 seconds . The outside temp appears in the display , but no codes .
AnswerDo NOT start a NEW question. Use the FOLLOWUP choice because I do not get the original question and answer that I gave you when you start a new question.
Try it again.
1. Ignition ON. Engine OFF.
2. Simultaneously push and hold the OFF and WARMER buttons for 3 seconds and then release the buttons.
3. The codes will start to display.
