P245BEGR Cooler Bypass Control Circuit Range/Performance Bank 1
Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainEmissionsOBD2
What P245B means
P245B
EGR Cooler Bypass Control Circuit Range/Performance Bank 1
Generic · emissions
Data confidence85%
The control module judged the EGR Cooler Bypass Control 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
Wiring
EGR cooler bypass valve
ECM / Wiring
HO2S
ECM
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.
2
Generic SAE-standard code: same meaning on every make.
45B
Specific fault index within the subsystem.
Frequently asked questions about P245B
What does P245B mean?
EGR Cooler Bypass Control Circuit Range/Performance Bank 1. The control module judged the EGR Cooler Bypass Control signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions.
Is P245B generic or manufacturer-specific?
P245B is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P245B 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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