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TuningBot DTC Database · v4.37.15

P24A9 EGR Cooler Coolant Pump Control Circuit Low

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

P · PowertrainEmissionsOBD2

What P24A9 means

P24A9
EGR Cooler Coolant Pump Control Circuit Low Generic · emissions Data confidence 65%

The control module detected that the signal in the EGR Cooler Coolant Pump Control circuit stayed below the expected operating range.

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 P24A9

P

Powertrain: engine, transmission and driveline systems.

2

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

4A9

Specific fault index within the subsystem.

Frequently asked questions about P24A9

What does P24A9 mean?

EGR Cooler Coolant Pump Control Circuit Low. The control module detected that the signal in the EGR Cooler Coolant Pump Control circuit stayed below the expected operating range.

Is P24A9 generic or manufacturer-specific?

P24A9 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P24A9 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

ECU tuningDyno-tested results by model and engine See the results →

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