Reading Diagnostic Trouble Codes

EXTRACTING CODES WITHOUT SCAN TOOL

CHECK ENGINE LIGHT Pattern:

Turn the ignition switch ON, OFF, ON, OFF, ON and observe the CHECK ENGINE LIGHT. The CHECK ENGINE LIGHT should begin to flash a series of codes. The flashes will be separated by short an long pauses. The long pauses separate the "ones" and "tens" positions, and each code from the next. A code 55 will be displayed at the end of the test.

NOTE: The above information is provided to accommodate users who do not have the proper scan tool available.