TuningBot DTC Database · v4.37.15
3 manufacturer-specific interpretations across 3 manufacturers in the TuningBot DTC database.
BMWThe control module detected a fault associated with the Cold start idle air control (IAC) system - RPM lower then expected circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by BMW.
ECM
ChevroletThe control module detected a fault associated with the Immobilizer Powertrain Identification Failed circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Chevrolet.
VAGThe control module detected a short circuit to ground in the ETS warning lamp circuit. This is the manufacturer-specific definition used by Audi.
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Diagnostic Trouble Code (3 interpretations). The control module detected a fault associated with the Cold start idle air control (IAC) system - RPM lower then expected circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by BMW.
P1678 is a manufacturer-specific code. In this database it is documented for: BMW, Chevrolet, 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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