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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 P0133: O2 Sensor Circuit Slow Responsive (Bank 1, Sensor 1) >> Inspection Procedures >> 4. Check Fuel Line Pressure
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4. Check Fuel Line Pressure

  1. Start the engine after installing a fuel pressure gauge at the service valve in the fuel rail.
  2. Warm up the engine to normal operating temperature.
  3. Check fuel line pressure.

Is fuel pressure within specification? 

Yes: Go to next step.

No: Repair it.