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2017 TOYOTA AVALON

2.5L I4FWDAUTOMATICgas
2 active safety recalls on this vehicle — view recalls
Repairs0Labor473Torque2476Fluid6DTC938Battery1Maintenance0Recalls2
P1661moderate severityPowertrain

EGR Circuit Malfunction

on 2017 Toyota Avalon 2.5L I4 · FWD

What this code means

The ECM detected a fault in the EGR system control circuit.

Symptoms

  • CEL
  • Rough idle
  • Hesitation
  • Increased NOx
  • Failed emissions

Common causes

  • Faulty EGR solenoid
  • Carbon clogged passages
  • Damaged wiring
  • Vacuum leaks

Diagnostic steps

  1. Test EGR solenoid
  2. Clean EGR passages
  3. Inspect wiring
  4. Check vacuum supply

Repair notes

Clean or replace EGR components.

Other Powertrain codes on this vehicle

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