P0404Exhaust Gas Recirculation Circuit Range/Performance
Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainEmissionsOBD2
What P0404 means
P0404
Exhaust Gas Recirculation Circuit Range/Performance
Generic · emissions
Data confidence90%
The control module judged the Exhaust Gas Recirculation signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions.
Symptoms
MIL illuminated
Possible reduced engine performance
Possible rough idle or hesitation
Possible causes
Hose leak/blockage
wiring
EGR valve/solenoid
Recommended checks
Read freeze frame data and full module scan
Check battery voltage and sensor supply
Inspect EGR wiring and connectors
Compare commanded vs actual EGR position/flow with live data
Inspect EGR valve and passages for carbon build-up
Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
404
Specific fault index within the subsystem.
Frequently asked questions about P0404
What does P0404 mean?
Exhaust Gas Recirculation Circuit Range/Performance. The control module judged the Exhaust Gas Recirculation signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions.
Is P0404 generic or manufacturer-specific?
P0404 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0404 at file level?
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.
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