The control module detected an interruption (open circuit) in the High Side 1 System circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Mitsubishi.
TuningBot DTC Database · v4.37.15
P1863 Mitsubishi - High Side 1 System Open Circuit
Manufacturer-specific interpretation for Mitsubishi. All interpretations of P1863
What P1863 means
Related and nearby codes
How to read P1863
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Frequently asked questions about P1863
What does P1863 mean?
High Side 1 System Open Circuit. The control module detected an interruption (open circuit) in the High Side 1 System circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Mitsubishi.
Is P1863 generic or manufacturer-specific?
P1863 is a manufacturer-specific code. In this database it is documented for: Mitsubishi. The same number can mean something different on other brands.
Can TuningBot remove P1863 at file level?
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.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic
