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TuningBot DTC Database · v4.37.14

P2494 EGR Cooler Bypass Position Sensor Circuit Low Bank 1

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

P · PowertrainEmissionsOBD2

What P2494 means

P2494
EGR Cooler Bypass Position Sensor Circuit Low Bank 1 Generic · emissions Data confidence 65%

The control module detected that the signal in the EGR Cooler Bypass Position 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 P2494

P

Powertrain: engine, transmission and driveline systems.

2

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

494

Specific fault index within the subsystem.

Frequently asked questions about P2494

What does P2494 mean?

EGR Cooler Bypass Position Sensor Circuit Low Bank 1. The control module detected that the signal in the EGR Cooler Bypass Position circuit stayed below the expected operating range.

Is P2494 generic or manufacturer-specific?

P2494 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P2494 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.

Other file services

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