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.
2003 Suzuki Aerio GS, AWD, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Self-Diagnostics
- Introduction
- General Description
- Self-Diagnostic System
- Engine Control Module
- Component Locations
- Summary
- Diagnostic Trouble Code Definitions
- System Tests
- Diagnostic Tests
- Notes
- DTC P0101: Mass Air Flow Sensor - Performance
- DTC P0102: Mass Air Flow Sensor Circuit - Low Voltage
- DTC P0103: Mass Air Flow Sensor Circuit - High Voltage
- DTC P0107: Manifold Absolute Pressure Sensor Circuit - Low Input
- DTC P0108: Manifold Absolute Pressure Sensor Circuit - High Input
- DTC P0111: Intake Air Temperature Circuit - Range/Performance
- DTC P0112: Intake Air Temperature Sensor Circuit - Low Input
- DTC P0113: Intake Air Temperature Sensor Circuit - High Input
- DTC P0116: Low Coolant Temperature Or Specified Value
- DTC P0117: Engine Coolant Temperature Sensor Circuit - Low Input
- DTC P0118: Engine Coolant Temperature Sensor Circuit - High Input
- DTC P0121: Throttle Position Sensor Circuit - Range/Performance
- DTC P0122: Throttle Position Sensor Circuit - Low Input
- DTC P0123: Throttle Position Sensor Circuit - High Input
- DTC P0125: Insufficient Coolant Temperature For Closed Loop Operation
- DTC P0128: Coolant Thermostat Malfunction
- DTC P0131 Or DTC P0132
- DTC P0133: Heated Oxygen Sensor No. 1 Circuit - Slow Response
- DTC P0134: Heated Oxygen Sensor No. 1 Circuit - No Activity Detected
- DTC P0135: Heated Oxygen Sensor No. 1 - Heater Circuit Malfunction
- DTC P0137 Or DTC P0138
- DTC P0141: Heated Oxygen Sensor No. 2 - Heater Circuit Malfunction
- DTC P0171 Or DTC P0172
- DTC P0300, DTC P0301, DTC P0302, DTC P0303 Or DTC P0304
- DTC P0327 Or DTC P0328
- DTC P0335: Crankshaft Position Sensor - Circuit Malfunction
- DTC P0340: Camshaft Position Sensor - Circuit Malfunction
- DTC P0401 Or DTC P0402
- DTC P0403: EGR Valve - Output Voltage Low
- DTC P0420: Catalyst System Efficiency Below Threshold
- DTC P0442 Or DTC P0455
- DTC P0444: EVAP System Purge Control Valve - Open Circuit
- DTC P0445: EVAP System Purge Control Valve - Short Circuit
- DTC P0447: EVAP System Vent Control - Vent Control Circuit Open
- DTC P0448: EVAP System Vent Control - Vent Control Circuit Shorted
- DTC P0451: EVAP System Pressure Sensor - Range/Performance
- DTC P0452: EVAP System Pressure Sensor - Low Input
- DTC P0453: EVAP System Pressure Sensor - High Input
- DTC P0456: EVAP System - Very Small Leak Detected
- DTC P0461: Fuel Level Sensor Circuit - Performance
- DTC P0463: Fuel Level Sensor Circuit - High Voltage Input
- DTC P0464: Fuel Level Sensor Circuit - Intermittent Condition
- DTC P0480: Radiator Cooling Fan Control Circuit Malfunction
- DTC P0481: A/C Condenser Fan Control Circuit Malfunction
- DTC P0496: EVAP System - Flow During Non-Purge
- DTC P0500: Vehicle Speed Sensor Malfunction
- DTC P0505, DTC P0506 & P0507
- DTC P0601: Internal Control Module Memory Check Sum Error
- DTC P0616: Starter Signal Circuit - Low
- DTC P0617: Starter Signal Circuit - High
- DTC P1510: Engine Control Module Back-Up Power Supply Malfunction
- DTC P1600: Serial Communication Problem Between ECM & TCM
- DTC P2025: EVAP Fuel Vapor Temperature Sensor Performance
- DTC P2026: EVAP Fuel Vapor Temperature Sensor Circuit - Low Voltage
- DTC P2027: EVAP Fuel Vapor Temperature Sensor Circuit - High Voltage
- DTC P2227, DTC P2228 & P2229
- DTC P2231: Heated Oxygen Sensor No. 1 - Signal Circuit Shorted To Heater Circuit
- DTC P2232: Heated Oxygen Sensor No. 2 - Signal Circuit Shorted To Heater Circuit
Factory Service Tools
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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.