Fault Family System: Network (U-Codes) 24 SAE Codes

Invalid Data Body Module

Diagnostic & Technical Explanation

U0422 means a body-network module received a message from the BCM, gateway, or a related body node with a value flagged as implausible -- for example a door-ajar or switch-input signal stuck in an impossible state -- while the network link itself remains healthy. Because the BCM often relays sensor and switch inputs gathered from many small body sensors, invalid data here frequently traces to one specific stuck switch, corroded switch-input connector, or a mis-set configuration option rather than the BCM hardware itself.

These 24 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 24 times.

Codes in this family (24)

Code	Definition	Repair coverage
U0422	Invalid Data Received From Body Control Module	4 ranked fixes
U0426	Invalid Data Received From Vehicle Immobilizer Control Module	4 ranked fixes
U0427	Invalid Data Received From Vehicle Security Control Module	4 ranked fixes
U0429	Invalid Data Received From Steering Column Control Module	4 ranked fixes
U0431	Invalid Data Received From Body Control Module A	4 ranked fixes
U0440	Invalid Data Received From Pedestrian Alert Control Module	4 ranked fixes
U0443	Invalid Data Received From Body Control Module B	4 ranked fixes
U0444	Invalid Data Received From Body Control Module C	4 ranked fixes
U0445	Invalid Data Received From Body Control Module D	4 ranked fixes
U0446	Invalid Data Received From Body Control Module E	4 ranked fixes
U0447	Invalid Data Received From Serial Data Gateway Module A	4 ranked fixes
U0448	Invalid Data Received From Serial Data Gateway Module B	4 ranked fixes
U0449	Invalid Data Received From Serial Data Gateway Module C	4 ranked fixes
U044A	Invalid Data Received From Serial Data Gateway Module D	4 ranked fixes
U0451	Invalid Data Received From Serial Data Gateway Module E	4 ranked fixes
U04BA	Invalid Data Received from Switch Input Module 'A'	4 ranked fixes
U04BB	Invalid Data Received from Switch Input Module 'B'	4 ranked fixes
U04BC	Invalid Data Received from Switch Input Module 'C'	4 ranked fixes
U0515	Invalid Data Received From Remote Function Actuation Module	4 ranked fixes
U0532	Invalid Data Received From Rain Sensing Module	4 ranked fixes
U0535	Invalid Data Received From Convenience Recall Module	4 ranked fixes
U0537	Invalid Data Received From Column Lock Module	4 ranked fixes
U0549	Invalid Data Received From Remote Accessory Module	4 ranked fixes
U0555	Invalid Data Received From Remote Start Module	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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