Code result
P0602
Control Module Programming Error
Moderate severity
What it means
The ECU is reporting that it is missing required calibration data — typically appears after a virgin module is installed but never coded/programmed for the vehicle, or after a flash that did not write all blocks.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Replacement ECU not coded to vehicle
highOne of the most commonly reported causes for this code — check this first.
Partial / interrupted flash
mediumA plausible cause — test and verify before replacing parts.
Related help
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