TuningBot DTC Database · v4.37.14
12 manufacturer-specific interpretations across 12 manufacturers in the TuningBot DTC database.
ChryslerThe control module registered the fault condition described as "Engine control module (ECM) - RAM link error". This is the manufacturer-specific definition used by Chrysler.
ECM
DodgeThe control module detected a fault associated with the Engine control module (ECM) - battery supply voltage circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Dodge.
JaguarThe control module detected improper operation of the EEPROM. This is the manufacturer-specific definition used by Jaguar.
JeepThe control module detected improper operation of the Engine control module (ECM). This is the manufacturer-specific definition used by Jeep.
KiaThe control module registered the fault condition described as "CAN Communication Bus Error". This is the manufacturer-specific definition used by Kia.
LexusThe control module detected a fault associated with the Engine Stall History circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Lexus.
Mercedes-BenzThe control module detected improper operation of the CAN data bus, ignition switch control module. This is the manufacturer-specific definition used by Mercedes-Benz.
Wiring
MitsubishiThe control module registered the fault condition described as "Engine control module (ECM) - RAM link error". This is the manufacturer-specific definition used by Mitsubishi.
ECM
SuzukiThe control module detected a fault associated with the Transmission control module (TCM) - trouble codes stored circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Suzuki.
ToyotaThe control module detected a fault associated with the Engine Stall History circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Toyota.
VAGThe control module's internal test reported the Engine control module (ECM) as faulty. This is the manufacturer-specific definition used by Audi.
ECM
VolvoThe control module judged the Electronic throttle system (ETS) behaviour implausible for the current operating conditions. This is the manufacturer-specific definition used by Volvo.
Powertrain: engine, transmission and driveline systems.
Manufacturer-defined range: the meaning can differ between brands.
Specific fault index within the subsystem.
Diagnostic Trouble Code (12 interpretations). The control module registered the fault condition described as "Engine control module (ECM) - RAM link error". This is the manufacturer-specific definition used by Chrysler.
P1603 is a manufacturer-specific code. In this database it is documented for: Chrysler, Dodge, Jaguar, Jeep, Kia, Lexus, Mercedes-Benz, Mitsubishi, Suzuki, Toyota, VAG, Volvo. 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: Diagnostic Strategy and DTC Logic
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