Cavalier Starting in the 1980s. the Cavalier made a name for itself by offering an affordable 2 and 4 door compact.
Platform: J-body

OBD1 won't work

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Old May 24, 2026 | 9:08 AM
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gejettest's Avatar
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Default OBD1 won't work

1994 Cavalier 2.4l
My OBD1 system won't flash any codes.
I short out the A & B pins and the check engine light just stays on.
Will not flash the "12" code to indicate diagnostic mode.
Checked all fuses, what else?
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