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Home >> Volvo >> 1992 >> 240 GL, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostics - Fuel Injection >> Fault Code Testing >> Code 1-5-4 (Egr Flow Too High)
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Code 1-5-4 (Egr Flow Too High)

  1. Check engine idling. If engine idles unevenly, go to next step. If engine idles evenly, go to step 5).
  2. Disconnect harness electrical connector from EGR vacuum controller. If idle is still uneven, go to next step. If engine idles evenly when connector is disconnected, check wiring between control module and EGR vacuum controller for short to ground. Repair as necessary. See WIRING DIAGRAMS section.
  3. With engine idling, CAREFULLY remove yellow vacuum hose from EGR vacuum controller. If engine now idles evenly, install new EGR vacuum controller and retest. If engine still idles unevenly, go to next step.
  4. With engine idling, CAREFULLY remove yellow hose at EGR valve. If engine now idles evenly, hose is obstructed. Replace hose and retest. If engine still idles unevenly, install new EGR valve and retest.
  5. Check engine temperature. Verify that temperature rises to normal range smoothly, and that upper radiator hose is hot when temperature stabilizes. If the above conditions are not observed, install new thermostat and retest. If engine temperature control is normal, go to next step.
  6. Turn ignition OFF. Clean EGR and ECT connectors and treat for corrosion, if necessary. Remove, clean, and reinstall ground wire at intake manifold
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