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Home >> Kia >> 2016 >> Optima SX Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 108 (Engine Control System Diagnosis - 1.6L (2 Of 3) - Optima (Except HEV)) >> DTC P0263: Cylinder 1 Contribution/Balance >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Air/Fuel Ratio Monitoring
  1. Dirty Fuel Injector
  2. Faulty Fuel Injector
  3. Plugged Fuel Injector
  4. Fuel injector harness is open or shorted
  5. Fuel injector circuit poor electrical connection
Enable Conditions
  • Engine Coolant Temperature more than 70°C (158°F) and under 110° C (230°F)
  • Catalyst temperature more than 400°C (752°F) and under 900°C (1652°F)
  • Engine speed more than 1520RPM and under 3240RPM
  • Engine load more than 25% and under 60%
  • BARO more than 74.5kPa (0.745bar/10.8psi)
  • Engaged gear more than 5
  • Closed loop fuel control On
  • Time after engine start over 0s
  • Rough road detection No
  • Gear change No
  • Circuit Monitoring of Upstream O2S Complete
Threshold value
  • Cylinder A/F deviation is more than 10% or under -10%
Diagnosis Time
  • 2 sets of lean shift test cycles in cylinder while maintaining global Lambda=1
MIL On Condition
  • 3 driving cycles