Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test Bu: PSCM (Power Steering Control Module) DTC (Diagnostic Trouble Code) U0422:00 Invalid Data Received From Body Control Module
The module reporting this DTC is not the problem module.
Do not install a new EPAS assembly if this DTC is set.
Refer to Wiring Diagrams POWER STEERING CONTROLS for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Power Steering - System Operation and Component Description .
Description
- The PSCM monitors the HS-CAN messages when the voltage to the PSCM is greater than 10 volts and there are no Diagnostic Trouble Codes (DTCs) present inhibiting PSCM operation.
Diagnostic Aids
- For additional information on the messages sent to the PSCM from the BCM module, refer to the Network Message List in DESCRIPTION AND OPERATION .
- DTC U0422:00 indicates a power mode message concern. The module reporting this DTC is not the problem module. Do not install a new EPAS assembly if this DTC is set.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| PSCM U0422:00 | Invalid Data Received From Body Control Module: No Sub Type Information | This DTC is set if the PSCM receives an "fault" or "unknown" message from the BCM instead of valid information. |
Possible Sources
- HS-CAN concern
- BCM
Pinpoint Tests BU: PSCM DTC U0422 Invalid Data Received From Body Control Module
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.