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.
2002 Saturn L200 AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Self-Diagnostics
- Introduction
- Self-Diagnostic System
- Programming
- Inspection/Maintenance Procedures
- Summary
- Diagnostic Trouble Code Definitions
- Component Locations
- Connector Identification
- System Tests
- Diagnostic Tests
- Notes
- DTC P0105: Map Sensor Circuit Range/Performance
- DTC P0107: Map Sensor Circuit - Low Voltage
- DTC P0108: Map Sensor Circuit - High Voltage
- DTC P0112: IAT Sensor Circuit - Low Voltage/High Temperature
- DTC P0113: IAT Sensor Circuit - High Voltage/Low Temperature
- DTC P0116: ECT Sensor Performance
- DTC P0117: ECT Sensor Circuit - Low Voltage/High Temperature
- DTC P0118: ECT Sensor Circuit - High Voltage/Low Temperature
- DTC P0122: TP Sensor Circuit - Low Voltage
- DTC P0123: TP Sensor Circuit - High Voltage
- DTC P0125: ECT Excessive Time To Enter Closed Loop
- DTC P0128: Coolant Thermostat
- DTC P0130: Ho2S1 Closed Loop Rationality
- DTC P0131: Ho2S1 Circuit - Low Voltage
- DTC P0132: Ho2S1 Circuit - High Voltage
- DTC P0133: Ho2S1 Circuit - Slow Response
- DTC P0134: Ho2S1 Circuit - Insufficient Activity
- DTC P0135: Ho2S1 Heater Performance
- DTC P0137: Ho2S2 Circuit - Low Voltage
- DTC P0138: Ho2S2 Circuit - High Voltage
- DTC P0140: Ho2S2 Circuit - Insufficient Activity
- DTC P0141: Ho2S2 Circuit - Heater Malfunction
- DTC P0171: Fuel Trim System Lean
- DTC P0172: Fuel Trim System Rich
- DTC P0201-P0204: Injector Control Circuit
- DTC P0217: ECT Sensor Circuit Over Temperature
- DTC P0300: Engine Misfire Detected
- DTC P0301-P0304: Cylinders No. 1-4 Misfire Detected
- DTC P0326: Knock Sensor Performance
- DTC P0327: Knock Sensor Circuit
- DTC P0336: Crankshaft Position Sensor Circuit
- DTC P0340: Camshaft Position Sensor Circuit
- DTC P0341: Camshaft Position Sensor - Circuit Performance
- DTC P0410: Air System
- DTC P0420: Catalyst System Efficiency Below Threshold
- DTC P0440: Evaporative Emission System
- DTC P0442: EVAP System - Small Leak Detected
- DTC P0446: EVAP Vent Solenoid Valve Control System
- DTC P0452: EVAP Fuel Tank Pressure Sensor Circuit - Low Voltage
- DTC P0453: EVAP Fuel Tank Pressure Sensor Circuit - High Voltage
- DTC P0461: Fuel Level Sensor Circuit Performance
- DTC P0462: Fuel Level Sensor Circuit - Low Voltage
- DTC P0463: Fuel Level Sensor Circuit - High Voltage
- DTC P0480: Cooling Fan Control Relay No. 1 Circuit
- DTC P0481: Cooling Fan Control Relay No. 2 Circuit
- DTC P0502: VSS Circuit - Low Input (M/T Without Abs)
- DTC P0502: VSS Circuit - Low Input (M/T With Abs)
- DTC P0502: VSS Circuit - Low Input (A/T)
- DTC P0503: VSS Circuit - Intermittent (A/T)
- DTC P0506: Idle Speed Low
- DTC P0507: Idle Speed High
- DTC P0530: A/C Refrigerant Pressure Sensor Circuit
- DTC P0562 & P0563: System Voltage Low Or High
- DTC P0601: Pcm Memory
- DTC P0602: Pcm Not Programmed
- DTC P0621: Generator "L" Terminal Circuit
- DTC P0622: Generator "F" Terminal Circuit
- DTC P0705: Transmission Range Switch Circuit
- DTC P0719: Brake Switch Circuit High
- DTC P0724: Brake Switch Circuit Low
- DTC P1133: Ho2S1 Circuit - Insufficient Switching
- DTC P1137: O2S System Monitor - Lean System Or Low Voltage
- DTC P1138: O2S System Monitor - Rich System Or High Voltage
- DTC P1171: Fuel System Lean During Acceleration
- DTC P1336: Crankshaft Position System Variation Not Learned
- DTC P1441: EVAP System Flow During Non-Purge
- DTC P1599: Engine Stall Or Near Stall Detected
- DTC P1621: Pcm Long Term Memory Performance
- DTC P1630: Theft Deterrent System - Pcm In Learn Mode
- DTC P1631: Theft Deterrent System - Password Incorrect
- DTC P1632: Theft Deterrent System - Fuel Disabled
- DTC P1640: Control Module Output Circuit
- DTC P1640: A/C Relay Control Circuit Low Voltage
- DTC P1640: A/C Relay Control Circuit High Voltage
- DTC P1683: Control Module Ignition Off Timer Performance
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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