Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2001 Kia Rio AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Self-Diagnostics - RIO
- Introduction
- Self-Diagnostic System
- Connector Identification
- Diagnostic Tests
- Notes
- DTC P0030: Front Ho2S Heater Malfunction
- DTC P0036: Rear Ho2S Heater Malfunction
- DTC P0100: Mass Airflow Sensor Circuit Malfunction
- DTC P0101: Mass Airflow Sensor Range/Performance Problem
- DTC P0110: Intake Air Temperature Sensor Circuit Malfunction Or DTC P0111: Intake Air Temperature Sensor Range/Performance Problem
- DTC P0115: Engine Coolant Temperature Sensor Circuit Malfunction
- DTC P0116: Engine Coolant Temperature (ECT) Sensor Range/Performance Malfunction Or DTC P0125: Insufficient Coolant Temperature To Enter Closed Loop
- DTC P0120: Throttle Position (TP) Sensor Circuit Malfunction Or DTC P0121: Throttle Position (TP) Sensor Circuit Range/Performance Malfunction
- DTC P0128: Coolant Thermostat Stuck Open
- DTC P0130: Front Heated Oxygen Sensor (Ho2S) Circuit Malfunction
- DTC P0133: Front Heated Oxygen Sensor (Ho2S) Slow Response
- DTC P0134: No Front Heated Oxygen Sensor (Ho2S) Activity Detected
- DTC P0135: Front Heated Oxygen Sensor (Ho2S) Heater Circuit Malfunction
- DTC P0136: Rear Heated Oxygen Sensor (Ho2S) Circuit Malfunction
- DTC P0139: Rear Heated Oxygen Sensor (Ho2S) Circuit Slow Response
- DTC P0140: No Rear Heated Oxygen Sensor (Ho2S) Activity Detected
- DTC P0141: Rear Heated Oxygen Sensor (Ho2S) Heater Circuit Malfunction
- DTC P0170: Fuel System Malfunction (Adaptive)
- DTC P0171: System Too Lean
- DTC P0172: System Too Rich
- DTC P0201-P0204: Fuel Injectors No. 1-4 Circuit Malfunction
- DTC P0300-P0304: Random/Multiple Cylinder Misfire Detected
- DTC P0325: Knock Sensor Circuit Malfunction
- DTC P0335: Crankshaft Position Sensor (CKP) Circuit Malfunction
- DTC P0340: Camshaft Position (CMP) Sensor Circuit Malfunction
- DTC P0422: Catalyst Efficiency Below Threshold
- DTC P0440: EVAP System Malfunction, DTC P0442: EVAP System Leak Detected (Small Leak 1.0 Mm), DTC P0455: EVAP System Leak Detected (Large Leak, Larger Than .75 Mm) Or DTC P0456: EVAP System Leak Detected (Small Leak .5 Mm)
- DTC P0443: EVAP System Purge Control Circuit Malfunction Or DTC P0446: EVAP System Vent Control Circuit Malfunction
- DTC P0450: EVAP System Pressure Sensor Malfunction Or DTC P0451: EVAP System Pressure Sensor Range/Performance
- DTC P0501: Vehicle Speed Sensor (VSS) Range/Performance Malfunction
- DTC P0506: Idle Air Control (IAC) System Idle Low
- DTC P0507: Idle Air Control (IAC) System Idle High
- DTC P0562: System Voltage Low Or DTC P0563: System Voltage High
- DTC P0601: Engine Control Module (ECM) Check Sum Error
- DTC P0650: Malfunction Indicator Light (Mil) Circuit Malfunction
- DTC P1505: Idle Air Control (IAC) Valve Opening Coil Signal Low Or DTC P1506: Idle Air Control (IAC) Valve Opening Coil Signal High
- DTC P1507: Idle Air Control (IAC) Valve Closing Coil Signal Low Or DTC P1508: Idle Air Control (IAC) Valve Closing Coil Signal High
- DTC P1586: Automatic Transaxle (A/T) Or Manual Transaxle (M/T) Codification
- DTC P1640: Main Relay Malfunction
- DTC P1693: TCM Malfunction Indicator Light (Mil) Circuit Malfunction
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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