TuningBot DTC Database · v4.37.14
Manufacturer-specific interpretation for Subaru. All interpretations of P1421
The control module detected that the Exhaust gas recirculation (EGR) system voltage stayed above the expected range. This is the manufacturer-specific definition used by Subaru.
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Exhaust gas recirculation (EGR) system - voltage high. The control module detected that the Exhaust gas recirculation (EGR) system voltage stayed above the expected range. This is the manufacturer-specific definition used by Subaru.
P1421 is a manufacturer-specific code. In this database it is documented for: Subaru. 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 and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Understand the system behind this code: EGR System
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