P245DExhaust gas recirculation (EGR) cooler bypass valve - control circuit high / Heated oxygen sensor (HO2S) 1, bank 1 - signal low
Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainEmissionsOBD2
What P245D means
P245D
Exhaust gas recirculation (EGR) cooler bypass valve - control circuit high / Heated oxygen sensor (HO2S) 1, bank 1 - signal low
Generic · emissions
Data confidence78%
The control module detected that the signal in the Exhaust gas recirculation (EGR) cooler bypass valve - control circuit stayed above the expected operating range.
Symptoms
MIL illuminated
Possible reduced engine performance
Possible rough idle or hesitation
Possible causes
Wiring
EGR cooler bypass valve
ECM / Wiring
short to ground
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.
45D
Specific fault index within the subsystem.
Frequently asked questions about P245D
What does P245D mean?
Exhaust gas recirculation (EGR) cooler bypass valve - control circuit high / Heated oxygen sensor (HO2S) 1, bank 1 - signal low. The control module detected that the signal in the Exhaust gas recirculation (EGR) cooler bypass valve - control circuit stayed above the expected operating range.
Is P245D generic or manufacturer-specific?
P245D is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P245D 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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