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Home >> Suzuki >> 2005 >> Aerio SX, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> DTC P0171, P0172: System Too Lean/Rich >> Diagnostic Trouble Codes Detecting Condition and Trouble Area
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Diagnostic Trouble Codes Detecting Condition and Trouble Area

DTC DETECTING CONDITION AND TROUBLE AREA

DTC detecting condition Trouble area
P0171: 
Total fuel trim is higher than 29% when canister purge control is not activated.
(2 driving cycle detection logic)
P0172: 
Total fuel trim is lower than -29% when canister purge control is not activated.
(2 driving cycle detection logic)
  • Vacuum leaks
  • Exhaust gas leakage
  • Fuel pressure out of specification
  • Fuel injector malfunction
  • Heated oxygen sensor-1 malfunction
  • MAF sensor malfunction
  • ECT sensor malfunction
  • Fuel level sensor malfunction
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