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TuningBot DTC Database · v4.37.15

P24C4 EGR Cooler Bypass Position Sensor Exceeded Learning Limit Bank 1

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainEmissionsOBD2

What P24C4 means

P24C4
EGR Cooler Bypass Position Sensor Exceeded Learning Limit Bank 1 Generic · emissions Data confidence 65%

The control module detected that the monitored EGR Cooler Bypass Position value exceeded the calibrated threshold.

Symptoms

  • MIL illuminated
  • Possible reduced engine performance
  • Possible rough idle or hesitation

Possible causes

  • Carbon-blocked EGR passages
  • Sticking or slow EGR valve
  • EGR actuator or position sensor fault
  • Wiring or connector fault
  • Vacuum supply fault (vacuum-operated systems)

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
  • Check related vacuum lines where fitted

Related and nearby codes

How to read P24C4

P

Powertrain: engine, transmission and driveline systems.

2

Generic SAE-standard code: same meaning on every make.

4C4

Specific fault index within the subsystem.

Frequently asked questions about P24C4

What does P24C4 mean?

EGR Cooler Bypass Position Sensor Exceeded Learning Limit Bank 1. The control module detected that the monitored EGR Cooler Bypass Position value exceeded the calibrated threshold.

Is P24C4 generic or manufacturer-specific?

P24C4 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P24C4 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.

Other file services

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