TuningBot DTC Database · v4.37.15
12 manufacturer-specific interpretations across 12 manufacturers in the TuningBot DTC database.
ChevroletThe control module detected that the Engine control module (ECM), torque reduction value was outside the valid range. This is the manufacturer-specific definition used by Chevrolet.
ChryslerThe control module detected improper operation of the Over Drive Pressure Switch Sense circuit. This is the manufacturer-specific definition used by Chrysler.
DodgeThe control module detected improper operation of the Over Drive Pressure Switch Sense circuit. This is the manufacturer-specific definition used by Dodge.
FordThe control module detected a fault associated with the 4x4 Low Switch Out of Self - Test Range Conditions circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Ford.
JeepThe control module detected improper operation of the Over Drive Pressure Switch Sense circuit. This is the manufacturer-specific definition used by Jeep.
Land RoverThe control module detected a fault associated with the Transmission mode selection switch 4×4 - circuit out of self - test range circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Land Rover.
LexusThe control module detected improper operation of the Shift Lever Switch. This is the manufacturer-specific definition used by Lexus.
Mercedes-BenzThe control module detected a fault associated with the Upshift Delay Switchover Valve ATCC Y35 circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Mercedes-Benz.
NissanThe control module detected that the Transmission 4x4 Low Switch value was outside the valid range. This is the manufacturer-specific definition used by Nissan.
OpelThe control module detected a fault associated with the CAN data bus, ECM actual torque signal - malfunction detected circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Opel.
ToyotaThe control module detected improper operation of the Shift lever switch. This is the manufacturer-specific definition used by Toyota.
VAGThe control module detected a short circuit to ground in the Engine Torque Reduction Open circuit. This is the manufacturer-specific definition used by Volkswagen.
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Diagnostic Trouble Code (12 interpretations). The control module detected that the Engine control module (ECM), torque reduction value was outside the valid range. This is the manufacturer-specific definition used by Chevrolet.
P1781 is a manufacturer-specific code. In this database it is documented for: Chevrolet, Chrysler, Dodge, Ford, Jeep, Land Rover, Lexus, Mercedes-Benz, Nissan, Opel, Toyota, VAG. The same number can mean something different on other brands.
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Understand the system behind this code: Diagnostic Strategy and DTC Logic
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