TuningBot DTC Database · v4.37.14
11 manufacturer-specific interpretations across 10 manufacturers in the TuningBot DTC database.
ChevroletThe control module detected that the signal in the Intake Air Low Pressure Switch circuit stayed above the expected operating range. This is the manufacturer-specific definition used by Chevrolet.
ChryslerThe control module detected that the signal in the Intake Air Low Pressure Switch circuit stayed above the expected operating range. This is the manufacturer-specific definition used by Chrysler.
FordThe control module detected a fault associated with the Catalyst Damage circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Ford.
LexusThe control module detected a condition consistent with a leak affecting the Evaporative emission (EVAP) system - large. This is the manufacturer-specific definition used by Lexus.
MitsubishiThe control module detected a fault associated with the Clogged Or Dirty Catalyst circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Mitsubishi.
NissanThe control module detected improper operation of the Cold start emission control. This is the manufacturer-specific definition used by Nissan.
SubaruThe 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.
SuzukiThe control module registered the fault condition described as "Evaporative emission (EVAP) canister purge valve - mechanical fault". This is the manufacturer-specific definition used by Suzuki.
EVAP canister purge valve
ToyotaThe control module detected a condition consistent with a leak affecting the EVAP Canister Gross. This is the manufacturer-specific definition used by Toyota.
VAGThe control module detected a short circuit to ground in the Secondary air injection (AIR) valve/solenoid circuit. This is the manufacturer-specific definition used by Audi.
The control module detected a short circuit to ground in the Secondary Air Injection Solenoid Valve (N112) circuit. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 17829. 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 (11 interpretations). The control module detected that the signal in the Intake Air Low Pressure Switch circuit stayed above the expected operating range. This is the manufacturer-specific definition used by Chevrolet.
P1421 is a manufacturer-specific code. In this database it is documented for: Chevrolet, Chrysler, Ford, Lexus, Mitsubishi, Nissan, Subaru, Suzuki, Toyota, 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 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: Oxygen Sensors (Lambda)
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