TuningBot DTC Database · v4.37.15
5 manufacturer-specific interpretations across 5 manufacturers in the TuningBot DTC database.
FordThe control module detected improper operation of the Transmission Transfer Case Clockwise Shift Relay Coil circuit. This is the manufacturer-specific definition used by Ford.
HyundaiThe control module detected a fault associated with the Pump for 4WD Motor High Overcurrent 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 Hyundai.
MitsubishiThe control module detected that the Shift Fork Position Sensor 1 System voltage stayed below the expected range. This is the manufacturer-specific definition used by Mitsubishi.
NissanThe control module detected a fault associated with the Engine Speed Signal circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Nissan.
VAGThe control module detected a short circuit to battery voltage in the Pressure Control Valve 2 (N216) circuit. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 18228. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).
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 Transmission Transfer Case Clockwise Shift Relay Coil circuit. This is the manufacturer-specific definition used by Ford.
P1820 is a manufacturer-specific code. In this database it is documented for: Ford, Hyundai, Mitsubishi, Nissan, 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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