Code result
U0327
Software Incompatibility with Powertrain Control Module
High severity
What it means
A control module has detected that its software version does not match the engine/powertrain ECU. Typically after a partial flash, mismatched coding, or fitting a used ECM from a different vehicle.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
ECM software/calibration mismatch
highOne of the most commonly reported causes for this code — check this first.
Used ECM fitted from different vehicle
mediumA plausible cause — test and verify before replacing parts.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
Related help
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