Code result
U0521
Invalid Data Received from Power Steering Control Module
High severity
What it means
Other modules receive implausible EPS torque or angle data. EPS reduces or disables assist; the EPS warning lamp comes on.
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
Torque sensor drift
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.
CAN terminating resistor (120 Ω) drifted out of spec
lowLess common, but worth ruling out after the more likely causes.
Related help
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