TuningBot DTC Database · v4.37.15
5 manufacturer-specific interpretations across 4 manufacturers in the TuningBot DTC database.
ChevroletThe control module detected improper operation of the Alternator ‘L’ terminal circuit. This is the manufacturer-specific definition used by Chevrolet.
Land RoverThe control module detected a fault associated with the Immobilizer signal - CAN data bus 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.
Wiring open circuit
PSAThe control module detected the fault condition "internal fault" for the Engine ECU. Documented for the Siemens SID 803 injection ECU (DW10BTED4 2.0 HDi) on Peugeot applications; the same PSA control units are also fitted to Citroën models.
VAGThe control module detected improper operation of the Injector 3 - current circuit. This is the manufacturer-specific definition used by Audi.
Wiring open circuit/short to ground
The control module detected an electrical fault in the Valve for Pump - Jet: Cylinder 3 (N242) circuit. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 18076. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).
Irregular rpm
Check wiring and Check / Clean all connections
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Diagnostic Trouble Code (5 interpretations). The control module detected improper operation of the Alternator ‘L’ terminal circuit. This is the manufacturer-specific definition used by Chevrolet.
P1668 is a manufacturer-specific code. In this database it is documented for: Chevrolet, Land Rover, PSA, 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: Immobilizer Systems and ECU Pairing
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