Control Module Self Test Speed Monitoring
BMW · engine
Data confidence62%
The control module detected a fault associated with the Control Module Self Test Speed Monitoring circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by BMW.
Engine control module (ECM) - RAM read/write error
Chrysler · software
Data confidence62%
The control module registered the fault condition described as "Engine control module (ECM) - RAM read/write error". This is the manufacturer-specific definition used by Chrysler.
Engine control module (ECM) - RAM read/ write error
Dodge · software
Data confidence62%
The control module registered the fault condition described as "Engine control module (ECM) - RAM read/ write error". This is the manufacturer-specific definition used by Dodge.
Engine control module (ECM) - RAM read/writeerror
Jeep · software
Data confidence62%
The control module registered the fault condition described as "Engine control module (ECM) - RAM read/writeerror". This is the manufacturer-specific definition used by Jeep.
Engine control module (ECM) - RAM read/write error
Mitsubishi · software
Data confidence62%
The control module registered the fault condition described as "Engine control module (ECM) - RAM read/write error". This is the manufacturer-specific definition used by Mitsubishi.
Electronic throttle system (ETS) control module - malfunction
Volvo · engine
Data confidence62%
The control module detected improper operation of the Electronic throttle system (ETS) control module. This is the manufacturer-specific definition used by Volvo.
Powertrain: engine, transmission and driveline systems.
1
Manufacturer-defined range: the meaning can differ between brands.
604
Specific fault index within the subsystem.
Frequently asked questions about P1604
What does P1604 mean?
Diagnostic Trouble Code (10 interpretations). The control module detected a fault associated with the Control Module Self Test Speed Monitoring circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by BMW.
Is P1604 generic or manufacturer-specific?
P1604 is a manufacturer-specific code. In this database it is documented for: BMW, Chrysler, Dodge, Jeep, Lexus, Mitsubishi, Opel, Toyota, VAG, Volvo. The same number can mean something different on other brands.
Can TuningBot remove P1604 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.
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BMW
Chrysler
Dodge
Jeep
Lexus
Mitsubishi
Opel
Toyota
VAG
Volvo