2002 Saturn SC1 AutomaticFACTORY OEM SERVICE PROCEDURE

Diagnostic Trouble Code Definitions

NOTE: Use of Tech 2 or generic OBD II scan tool is required to retrieve DTCs. Refer to user reference manual supplied with scan tool.
DIAGNOSTIC TROUBLE CODE INDEX

DTC Description (1) Code Type
BXXXX Body Control System Malfunction (2)
CXXXX Chassis Control System Malfunction (2)
P0037  HO2S Heater Control Circuit Low B
P0038  HO2S Heater Control Circuit High B
P0105  MAP Sensor Circuit B
P0107  MAP Sensor Circuit Low Voltage A
P0108  MAP Sensor Circuit - High Voltage A
P0112  IAT Sensor Circuit - Low Voltage/High Temperature A
P0113  IAT Sensor Circuit - High Voltage/Low Temperature A
P0116  ECT Sensor Performance B
P0117  ECT Sensor Circuit - Low Voltage/High Temperature A
P0118  ECT Sensor Circuit - High Voltage/Low Temperature A
P0122  TP Sensor Circuit - Low Voltage A
P0123  TP Sensor Circuit - High Voltage A
P0125  ECT Excessive Time To Enter Closed Loop Fuel Control B
P0128  ECT Below Thermostat Regulating Temperature B
P0130  Closed Loop Rationality B
P0131  O2S1 Circuit - Low Voltage B
P0132  O2S1 Circuit - High Voltage B
P0133  O2S1 Circuit - Slow Response B
P0134  O2S1 Circuit - Insufficient Activity B
P0137  HO2S2 Circuit - Low Voltage B
P0138  HO2S2 Circuit - High Voltage B
P0140  HO2S2 Circuit - Insufficient Activity B
P0171  Fuel Trim System Lean D
P0172  Fuel Trim System Rich D
P0200  Injector Control Circuit D
P0217  Engine Coolant Overtemperature D
P0218  Transaxle Fluid Overtemperature D
P0231  Fuel Pump Relay Control Circuit - Low Voltage D
P0232  Fuel Pump Relay Control Circuit - High Voltage D
P0261  Injector No. 1 Control Circuit - Low Voltage D
P0262  Injector No. 1 Control Circuit - High Voltage D
P0264  Injector No. 2 Control Circuit - Low Voltage D
P0265  Injector No. 2 Control Circuit - High Voltage D
P0267  Injector No. 3 Control Circuit - Low Voltage D
P0268  Injector No. 3 Control Circuit - High Voltage D
P0270  Injector No. 4 Control Circuit - Low Voltage D
P0271  Injector No. 4 Control Circuit - High Voltage D
P0300  Engine Misfire Detected B
P0324  Knock Sensor System B
P0325  Knock Sensor System B
P0326  Knock Sensor System Performance D
P0327  Knock Sensor Circuit - Low Input B
P0336  Crankshaft Position (CKP) Sensor Circuit Performance B
P0340  CMP Sensor Circuit B
P0341  CMP Sensor Circuit Performance B
P0351  Ignition Control Cylinder No. 1 & 4 Circuit D
P0352  Ignition Control Cylinder No. 2 & 3 Circuit D
P0401  EGR Flow Insufficient A
P0403  EGR Solenoid Control Circuit D
P0404  EGR Desired Position Open Performance B
P0405  EGR Valve Position Sensor Circuit - Low Voltage B
P0410  AIR System B
P0413  AIR Switching Valve Circuit Open D
P0414  AIR Switching Valve Circuit Shorted D
P0418  Secondary AIR Injection System Relay Circuit D
P0420  TWC Catalyst - Low Efficiency A
P0440  EVAP System A
P0442  EVAP System Small Leak Detected A
P0444  EVAP Purge Valve Control Circuit Open D
P0445  EVAP Purge Valve Control Circuit Shorted D
P0446  EVAP Vent Solenoid Valve Control System A
P0447  EVAP Vent Valve Control Circuit Open D
P0448  EVAP Vent Valve Control Circuit Shorted D
P0452  EVAP Fuel Tank Pressure Sensor Circuit - Low Voltage A
P0453  EVAP Fuel Tank Pressure Sensor Circuit - High Voltage A
P0461  Fuel Tank Level Sensor Circuit Performance D
P0462  Fuel Tank Level Sensor Circuit - Low Voltage D
P0463  Fuel Tank Level Sensor Circuit - High Voltage D
P0480  Cooling Fan Relay Control Circuit D
P0500  Vehicle Speed Sensor (VSS) Circuit A
P0506  Idle Speed Low B
P0507  Idle Speed High B
P0508  Idle Control System Circuit Low D
P0509  Idle Control System Circuit High D
P0561  System Voltage Performance D
P0562  System Voltage Low D
P0563  System Voltage High D
P0565 (3) Cruise Control Switch Circuit D
P0572  Cruise/Brake Switch Circuit - Low Voltage D
P0573  Cruise/Brake Switch Circuit - High Voltage D
P0601  PCM Memory N/A
P0602  PCM Not Programmed N/A
P0603  PCM Memory Reset N/A
P0606  PCM Internal Performance N/A
P0621  Generator "L" Terminal Circuit D
P0636 (4) Steering Assist Solenoid Control Circuit Low Voltage D
P0637 (4) Steering Assist Solenoid Control Circuit High Voltage D
P0646  A/C Clutch Relay Control Circuit Low Voltage D
P0647  A/C Clutch Relay Control Circuit High Voltage D
P0702 (5) Transmission Control System Low Voltage B
P0705  Transmission Range Switch Circuit B
P0706  Transmission Range Switch Performance B
P0708  Transmission Range Switch Circuit High Voltage A
P0710 (5) TFT Sensor Performance - Low Temp A
P0711 (5) TFT Sensor Performance A
P0712 (5) TFT Sensor Circuit Low Voltage/High Temp A
P0713 (5) TFT Sensor Circuit High Voltage/Low Temp A
P0714(5) TFT Sensor Circuit Intermittent B
P0716 (5) ISS Sensor Intermittent B
P0717 (5) ISS Sensor Low Input A
P0721 (5) OSS Sensor Performance B
P0722(5) OSS Sensor Low Input A
P0730 (5) Trans - No Gears Available B
P0731 (5) Incorrect 1st Gear Ratio B
P0732 (5) Incorrect 2nd Gear Ratio B
P0733 (5) Incorrect 3rd Gear Ratio B
P0734 (5) Incorrect 4th Gear Ratio B
P0740 (5) TCC Solenoid Control Circuit Low Voltage D
P0741 (5) TCC Stuck Off B
P0742 (5) TCC Stuck On B
P0743 (5) TCC Solenoid Control Circuit High Voltage D
P0745 (5) PC Solenoid - Pressure Low D
P0746 (5) PC Solenoid Control Circuit Low Voltage D
P0747 (5) PC Solenoid Control Circuit Low Voltage D
P0748 (5) Transaxle Line Pressure High D
P0756 (5) Shift Solenoid No. 2 Control Circuit Low Voltage D
P0758 (5) Shift Solenoid No. 2 Control Circuit High Voltage D
P0761 (5) Shift Solenoid No. 3 Control Circuit Low Voltage D
P0763 (5) Shift Solenoid No. 3 Control Circuit High Voltage D
P0766 (5) Shift Solenoid No. 4 Control Circuit Low Voltage D
P0768 (5) Shift Solenoid No. 4 Control Circuit High Voltage D
P0781 (5) Shift Solenoid No. 2 Performance B
P0782 (5) Shift Solenoid No. 3 Performance B
P0783 (5) Shift Solenoid No. 4 Performance B
P0789 (5) Shift/Timing Solenoid Control Circuit Intermittent D
P1133  O2S1 Circuit - Insufficient Switching B
P1134  O2S1 Transition Time Ratio B
P1336  CKP System Variation Not Learned A
P1351  IC Cyl. No. 1 & 4 Circuit - High Voltage D
P1352  IC Cyl. No. 2 & 3 Circuit - High Voltage D
P1403  EGR Solenoid Control Circuit - Low Voltage D
P1404  EGR Position Sensor Not Indicating Closed A
P1418  Secondary AIR Injection System Relay Control Circuit High D
P1441  EVAP System Flow During Non-Purge A
P1480  Cooling Fan Relay Control Circuit High D
P1580 (3) Cruise Control Move Output Circuit Low Voltage D
P1581 (3) Cruise Control Move Output Circuit High Voltage D
P1582 (3) Cruise Control Direction Output Circuit Low Voltage D
P1583 (3) Cruise Control Direction Output Circuit High Voltage D
P1584 (3) Cruise Control Disabled D
P1587 (3) Cruise Control Clutch Output Circuit Low Voltage D
P1588 (3) Cruise Control Clutch Output Circuit High Voltage D
P1599  Engine Stall Or Near Stall Detected D
P1620  Low Coolant Switch Circuit D
P1621  PCM Long Term Memory Performance N/A
P1624  Customer Snapshot Data Available D
P1626  Lost Class II Communication with BCM C
P1630  Theft Deterrent System - PCM In Learn Mode C
P1631  Theft Deterrent System - Password Incorrect C
P1635  5-Volt Reference Circuit A
UXXXX Communication System Malfunction (2)
(1) See CODE TYPES  under ON-BOARD DIAGNOSTICS.
(2) See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
(3) See appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
(4) See appropriate ELECTRONIC article in STEERING.
(5) See appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.
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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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