U0327

Q: Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

Software Incompatibility with Powertrain Control Module

High severity

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.

Common causes

ECM software/calibration mismatch
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $90-1650
Used ECM fitted from different vehicle
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $90-1650
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does U0327 mean?

U0327 means "Software Incompatibility with Powertrain Control Module". It is a generic OBD-II code that points to a fault in the network / communication.

What are the most common causes of U0327?

ecm software/calibration mismatch; used ecm fitted from different vehicle; gateway module routing can messages incorrectly — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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