Network
generic / SAE
U0521
Invalid Data Received from Power Steering Control Module
Other modules receive implausible EPS torque or angle data. EPS reduces or disables assist; the EPS warning lamp comes on.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number5 / 21
Possible causes
- Torque sensor drift medium
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec low
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 120–1500 €
- Estimated time: 0.5–4 h
- Component: eps module
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012