TuningBot DTC Database · v4.37.14
6 manufacturer-specific interpretations across 5 manufacturers in the TuningBot DTC database.
ChryslerThe control module detected improper operation of the Engine coolant blower motor relay. This is the manufacturer-specific definition used by Chrysler.
HondaThe control module detected a fault associated with the Exhaust gas recirculation (EGR) system - valve lift insufficient circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Honda.
Mercedes-BenzThe control module detected that the AIC system - pressure value was above the expected limit. This is the manufacturer-specific definition used by Mercedes-Benz.
AIC control module trouble code(s) stored
SubaruThe control module detected improper operation of the Positive crankcase ventilation (PCV). This is the manufacturer-specific definition used by Subaru.
VAGThe control module detected an interruption (open circuit) in the EVAP Canister Purge Regulator Valve 2 circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Audi.
The control module detected an interruption (open circuit) in the EVAP Canister Purge Regulator Valve 2 circuit, so the expected electrical continuity was not present. This is the manufacturer-specific definition used by Volkswagen.
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Diagnostic Trouble Code (6 interpretations). The control module detected improper operation of the Engine coolant blower motor relay. This is the manufacturer-specific definition used by Chrysler.
P1491 is a manufacturer-specific code. In this database it is documented for: Chrysler, Honda, Mercedes-Benz, Subaru, 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: EGR System
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