2005 Acura 1.7EL StandardFACTORY OEM SERVICE PROCEDURE

DTC Troubleshooting: Notes

DTC TROUBLESHOOTING LIST

DTC Description
DTC P0401Β  EGR Insufficient Flow
DTC P1491Β  EGR Valve Insufficient Lift
DTC P1498Β  EGR Valve Position Sensor Circuit High Voltage
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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