OBD2 / UDS DIAGNOSTIC TROUBLE CODE (DTC) & DFC MASK REFERENCE (WIKI LAYER 1) • 1,802 CODES

DTC Fault Code P0501 — DTC Fault Meaning, Limp Mode & ECU Firmware Deactivation (DTC OFF)

Search by diagnostic scanner fault code (e.g., P226D09, P2002F0, P24AEF2, P0401) to see which ECUs and calibration map packs (.KP / .A2L / .OLS) include verified DFC mask offsets for limp-free deactivation.

BOSCH DFC / FTB FACTORY SPECIFICATION IN DEALER MANUAL (MANUAL_DTC)2 RECORDS

OBD / FTB Code	Bosch DFC Monitor	Engineering Description	Manual Section
`P0501 0x64`	`DFC_VehVPlausPwr`	vehicle speed signal unreasonable	§258
`P0501 0x64`	`DFC_VehVPlausPwr`	vehicle speed signal unreasonable	§258

VERIFIED FIRMWARE (.BIN), MAP PACKS (.KP / .A2L) & SOLUTIONS FOR DTC P0501UNIQUE FILES: 2

Format	Solution File / DTC Mask Map Pack	Brand & ECU	Action
.PDF? .PDF — Automotive ECU Engineering FileVerified binary firmware, WinOLS calibration map pack, or dealer technical schematic for ECU programming and diagnostics.	2044825-4 engine control unit (ECU) China hold in storage malfunction memory record P0501 - 1.8 and 2.0 TFSI engine .pdf	Audi (Audi A3 / A4 / A6 / A8 / Q5 / Q7) • OEM Body Electrical, Wiring & General Modules	$35 • Open Solution →
.PDF? .PDF — Automotive ECU Engineering FileVerified binary firmware, WinOLS calibration map pack, or dealer technical schematic for ECU programming and diagnostics.	41 DTC Troubleshooting P0501,,CVT.pdf	Honda / Acura (KHonda Accord / CR-V / Civic / Acura) • OEM Body Electrical, Wiring & General Modules	$35 • Open Solution →

INDEXED DTC FAULT CODES IN VERIFIED FIRMWARE & MAP PACKSTOP DTC CODES

DTC Fault Code	Vehicle Brand	ECU Family	Matching Files in Vault	Solution / DTC OFF
`P0501`	Audi (Audi A3 / A4 / A6 / A8 / Q5 / Q7)	OEM Body Electrical, Wiring & General Modules	ROMs & Map Packs with this DTC: 2 pcs	Open DTC OFF Files for P0501 →