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Home >> Hyundai >> 2004 >> Elantra GLS, Standard >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> DTC Trouble Shooting Procedures >> DTC P1166: O2 Sensor System Lambda Bank Controller At The Limit (Bank 1) >> Inspection Procedures >> 5. Check Injector For Normal Operation

5. Check Injector For Normal Operation

  1. Start the engine and check the engine RPM decrease when disconnecting each injector connector in sequence
  2. Measure the decreasing engine RPM of all cylinders.

Is there any cylinder with no change in RPM or only a small RPM change? 

No: Go to next step.

Yes: Repair or replace it.

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