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Home >> Hyundai >> 2004 >> Elantra GLS, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> DTC Trouble Shooting Procedures >> DTC P2237, P2243, P2251 & P2626: Linear O2 Sensor Circuit Open (Bank 1, Sensor 1) >> Inspection Procedures >> 2. Visually Check HO2S

2. Visually Check HO2S

  1. Remove the HO2S
  2. Thoroughly check the HO2S for contamination, deterioration or damage.

Is HO2S contaminated, deteriorated or damaged? 

No 

Yes: Clean or replace HO2S.

Proceed with ECM problem procedure.

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