See the DTC page for P0.. (generic) codes and Glossary for terms and acronyms..

P1031    H02 Sensor Heater Control Circuit Problem
P1106    intermittent high or low Voltage in circuit of sensor MAP
P1107    MAP Sensor Circuit Intermittent Voltage Low
P1108    BARO to MAP Signal Circuit Comparison Too High
P1111    IAT Sensor Circuit Intermittent Voltage High
P1112    IAT Sensor Circuit Intermittent Voltage Low (except Catera)
P1112    Intake Plenum Switchover Valve Control (Catera)
P1113    Intake Resonance Switchover Valve Control
P1114    ECT Sensor Circuit Intermittent Voltage Low
P1115    ECT Sensor Circuit Intermittent Voltage High
P1120    Throttle Positioning Sensor 1 Circuit
P1121    Throttle Positioning Sensor 1,2 Circuit Performance/ Fuel Injector Secondary System Circuit Low
P1122    TPS Circuit Intermittent Voltage Low
P1125    APP System
P1133    HO2S/O2S Insufficient Switching Sensor 1 Or Bank 1 Sensor1
P1134    HO2S Transition Time Ratio Bank 1 Sensor 1
P1137    HO2 Sensor Low Voltage During Power Enrichment
P1138    HO2 Sensor High Voltage During Decel Fuel Cutoff
P1139    HO2S Insufficient Switching Bank 1 Sensor 2
P1140    HO2S Transition Time Ratio Bank 1 Sensor 2
P1141    HO2 Sensor Heater Control Circuit (Bank 1 Sensor 2)
P1153    HO2S Insufficient Switching Bank 2 Sensor 1
P1154    HO2S Transition Time Ratio Bank 2 Sensor 1
P1158    HO2 Sensor Shift Rich (Bank 2 Sensor 2)/ Engine Metal Over-Temperature Protection
P1161    HO2 Sensor Heater Control Circuit (Bank 2 Sensor 2)
P1171    Fuel System Lean During Acceleration
P1187    Engine Oil Temperature Sensor Circuit Voltage Low (except 1997 Corvette)
P1187    Engine Oil Pressure Sensor Circuit Voltage Low (1997 Corvette)
P1188    Engine Oil Temperature Sensor Circuit Voltage High (except 1997 Corvette)
P1188    Engine Oil Pressure Sensor Circuit Voltage High (1997 Corvette)
P1189    Engine Oil Pressure Switch Circuit
P1200    Injector Control Circuit
P1214    Injection Pump Timing Offset
P1215    Generator Driver Circuit
P1216    Fuel Solenoid Response Time Too Short
P1217    Fuel Solenoid Response Time Too Long
P1218    Injection Pump Calibration Circuit
P1220    Throttle Position (TP) Sensor 2 Circuit Fault
P1221    TP Sensor 1, 2 Performance
P1222    Injector Control Circuit Intermittent
P1250    Early Fuel Evaporative (EFE) Heater Circuit
P1257    Boost Control Condition/Supercharge System Overboost
P1260    Fuel Pump Speed Relay Control Circuit
P1271    Accelerator Pedal Position Sensor 1-2 Correlation
P1272    Accelerator Pedal Position Sensor 2-3 Correlation
P1273    Accelerator Pedal Position Sensor 1-3 Correlation
P1275    Boost Control Condition (except 1997-98 Corvette)
P1275    Accelerator Pedal Positioning (APP) Sensor 1 Circuit (1997-98 Corvette)
P1276    Accelerator Pedal Positioning (APP) Sensor 1 Circuit Performance
P1280    Accelerator Pedal Positioning (APP) Sensor 2 Circuit
P1281    Accelerator Pedal Positioning (APP) Sensor 2 Circuit Performance
P1285    Accelerator Pedal Positioning (APP) Sensor 2 Circuit
P1286    Accelerator Pedal Positioning (APP) Sensor 2 Circuit Performance
P1300    Ignition Coil 1 Primary Feedback Circuit
P1305    Ignition Coil 2 Primary Feedback Circuit
P1310    Ignition Coil 3 Primary Feedback Circuit
P1315    Ignition Coil 4 Primary Feedback Circuit
P1320    ICM 4X Reference Circuit Too Many Pulses (except 1996-98 4.0L)
P1320    ICM 4X Reference Circuit Intermittent No Pulses (1996-98 4.0L)
P1323    ICM 24X Reference Circuit Low Frequency
P1335    Crankshaft Positioning Sensing Circuit
P1336    CKP System Variation Not Learned
P1345    Camshaft To Crankshaft Position Correlation Fault
P1346    CKP Sensor System Variation Not Learned/ Intake Camshaft Position Performance
P1349    Intake Camshaft Position System
P1350    Ignition Control System
P1351    Ignition Control Circuit Voltage High (except 1998 3.1L)
P1351    Ignition Control Circuit Open (1998 3.1L)
P1352    Bypass Circuit Open Or Voltage High
P1359    Ignition Coil Group 1 Control Circuit
P1360    Ignition Coil group 2 Control Circuit
P1361    IC Circuit Not Toggling
P1361    Ignition Control Circuit Voltage Low (Distributor Ignition)
P1362    Bypass Circuit Shorted Or Voltage Low
P1370    ICM 4X Reference Too Many Pulses
P1371    ICM 4X Reference Too Few Pulses (except Caprice, Fleetwood, Impala SS & Roadmaster)
P1371    Distributor Ignition Low Resolution Circuit (Caprice, Fleetwood, Impala SS & Roadmaster)
P1372    CKP Sensor A-B Correlation
P1374    3X Reference Circuit
P1375    ICM 24X Reference Voltage Too High
P1376    Ignition Ground Circuit
P1377    ICM Cam Pulse To 4X Reference Pulse Comparison
P1380    ABS/EBCM/EB(T)CM DTC Detected/Rough Road Data Unusable
P1381    Misfire Detected No EBCM/EB(T)CM/PCM Serial Data
P1401    Exhaust Gas Recirculation (EGR) flow test fault
P1403    EGR Error
P1404    EGR Valve Closed Pintle Position
P1404    EGR Valve Stuck Open Or Circuit Performance
P1405    EGR Error
P1406    EGR Valve Pintle Position Circuit
P1408    MAP Sensor Circuit
P1410    Fuel Tank Pressure System
P1415    AIR System Bank 1
P1416    AIR System Bank 2
P1431    Fuel Level Sensor 2 Circuit Performance
P1432    Fuel Level Sensor 2 Circuit Voltage Low
P1433    Fuel Level Sensor 2 Circuit Voltage High
P1441    EVAP System Flow During Non-Purge
P1442    EVAP Vacuum Switch Circuit
P1450    BARO Sensor Circuit
P1451    BARO Sensor Circuit
P1460    Cooling Fan Circuit (except Catera)
P1460    Misfire Detected With Low Fuel (Catera)
P1483    Engine Cooling System Performance
P1500    Starter Signal Circuit
P1501    Theft Deterrent System
P1502    Theft Deterrent System No Password Received
P1503    Theft Deterrent System Password Improper
P1508    Idle Air Control (IAC) System Low RPM
P1509    IAC System High RPM
P1510    Back-Up Power Supply
P1511    Throttle Control System- Backup System Performance
P1514    TAC System MAF Performance
P1515    Command vs Actual Throttle Position Performance (PCM)
P1516    Command vs Actual Throttle Position Performance (TAC Module)
P1517    TAC Module Processor
P1518    PCM To TAC Module Serial Data Circuit
P1519    Throttle Actuator Control Module
P1520    Park/Neutral Position Switch Circuit, Gear Indicator System
P1523    Throttle Closed Position Performance
P1524    TPS Learned Closed Throttle Angle Degrees Out Of Range
P1526    TPS Learn Not Completed
P1527    Trans Range/Pressure Switch Comparison
P1530    Ignition Timing Adjustment Switch Circuit
P1530    A/C Refrigerant Pressure Sensor Error
P1531    Low Air Conditioning Refrigerant Charge
P1532    A/C Evaporator Temperature Circuit Voltage Low
P1533    A/C Low Side Temperature Sensor Circuit
P1535    A/C/ High Side Temperature Sensor Circuit
P1536    A/C System ECT Overtemperature
P1537    A/C Request Circuit Voltage Low
P1538    A/C Request Circuit Voltage High
P1539    A/C High Pressure Switch Circuit Voltage High
P1540    A/C System High Pressure
P1542    A/C System High Pressure/High Temperature
P1543    A/C System Performance
P1545    A/C Clutch Relay Control Circuit
P1546    A/C Clutch Relay Control Circuit Voltage Low (except 1996-98 Camaro/Firebird & 1997-98 Corvette)
P1546    A/C Clutch Status Circuit Voltage Low (1996-98 Camaro/ Firebird & 1997-98 Corvette)
P1550    Stepper Motor Speed Control
P1554    Speed Control Status Circuit
P1555    Electronic Variable Orifice Fault (Saturn)
P1558    Speed Control (SPS Low)
P1560    Speed Control System/Transaxle Not In Drive
P1561    Speed Control Vent Solenoid
P1562    Speed Control Vacuum Solenoid
P1564    Speed Control System/Vehicle Acceleration Too High (except Catera)
P1564    ECM Battery Voltage Loss (Catera)
P1565    Speed Control Servo Position Sensor
P1566    Speed Control System/Engine RPM Too High
P1567    Speed Control Switches/ABCS Active
P1568    Speed Control (SPS High)
P1570    Speed Control System/Traction Control Active
P1571    TCS Desired Torque Circuit (except 4.0L, 4.6L & 1997-98 5.7L Corvette)
P1571    Traction Control System PWM Circuit No Frequency (4.0L & 4.6L)
P1571    ASR Desired Torque (1997-98 5.7L Corvette)
P1572    Traction Control System Active Circuit Voltage Low Too Long
P1572    ASR/TCS Active Circuit Low Voltage Too Long
P1573    PCM/EBTCM Serial Data Circuit
P1573    Engine Hot Lamp Control Circuit
P1574    EBTCM System/Stop Lamp Circuit Voltage High (except 1997-98 Corvette)
P1574    Stop Lamp Control Circuit (1997-98 Corvette)
P1575    Extended Travel Brake Switch Circuit Voltage High
P1576    Brake Booster Vacuum Sensor Circuit Voltage High
P1577    Brake Booster Vacuum Sensor Circuit Voltage Low
P1578    Brake Booster Vacuum Sensor Circuit Low Vacuum
P1579    Park/Neutral To Drive/Reverse At High Throttle Angle
P1580    Cruise Control Module Move Circuit, Low Voltage
P1581    Cruise Control Module Move Circuit, High Voltage
P1582    Cruise Control Module Direction Circuit, Low Voltage
P1583    Cruise Control Module Direction Circuit, High Voltage
P1584    Cruise Control Disabled
P1585    Cruise Control Inhibit Output Circuit
P1586    Cruise Control Brake Switch 2 Circuit
P1599    Engine Stall Or Near Stall Detected
P1600    PCM Battery
P1600    Serial Communication Between PCM & TCM
P1601    Loss of Serial Communication (Except Catera)
P1601    ECM Overtemperature
P1602    Loss Of EBC/EBTCM Serial Data (Except Catera)
P1602    KS Module Circuit (Catera)
P1603    Loss Of SDM Serial Data
P1604    Loss of IPC Serial Data
P1605    Loss of HVAC Serial Data
P1607    Engine Oil Level Switch Circuit
P1610    Loss Of PZM Serial Data (1996-97 Except 1997 Cutlass & Malibu)
P1610    Failure With Body Function Controller (1997 Cutlass & Malibu)
P1610    Standard Body Module Series Data CKT (1998)
P1611    Loss Of CVRTD Serial Data
P1617    Engine Oil Level Switch Circuit
P1619    Engine Oil Lite Monitor Reset Circuit
P1620    Low Engine Coolant Level (Saturn)
P1621    PCM Memory Performance (Except 1998 5.7L)
P1621    VCM EEPROM Performance (1998 5.7L)
P1623    PCM Prom Error/ Transaxle Temperature Pull-Up Resistor Fault (Saturn Z body)
P1624    Customer Snapshot Data Available (Saturn)
P1625    TCM Flash Checksum Fault (Saturn)
P1626    Theft Deterrent System Fuel Enable Circuit
P1627    A/D Performance
P1628    PCM Engine Control Temp Pull-Up Resistor
P1629    Theft Deterrent System Fuel Enable Circuit Improper Signal Detected During Engine Cranking
P1629    Theft Deterrent Crank Signal Malfunction (1997-98 2.2L, 2.4L, 3.1L & 3.8L)
P1630    Theft Deterrent System/PCM/VCM in Learn Mode
P1631    Theft Deterrent System Password Improper
P1632    Theft Deterrent System Fuel Disabled
P1633    Ignition Supplemental Power Circuit Voltage Low
P1634    Ignition 1 Power Circuit Voltage Low
P1635    5 Volt Reference (A Or 1) Circuit
P1637    Alternator L Terminal Circuit
P1638    Alternator F Terminal Circuit
P1639    5 Volt Reference (B Or 2) Circuit
P1640    Driver 1 Input Voltage High
P1641    MIL Control Circuit (Except 5.7L VINs P & 5 & 1998 3.1L & 3.8L)
P1641    Fan Control Relay 1 Control Circuit (5.7L VINs P & 5)
P1641    A/C Relay Control Circuit (1998 3.1L & 3.8L)
P1642    Vehicle Speed Output Circuit (Except 3.4L, 5.7L VINs P & 5 & 1998 3.8L)
P1642    Fan Control Relay 2 & 3 Control Circuit (5.7L VINs P & 5)
P1642    AIR Control Circuit (3.4L)
P1642    Change Oil Lamp Control Circuit (1998 3.1L Lumina & Monte Carlo)
P1643    Fuel Pump PWM Control Circuit (Except 5.7L VINs P & 5)
P1643    Engine RPM Output Circuit (5.7L VINs P & 5)
P1644    Delivered Torque Output Circuit
P1645    Boost Control Solenoid Circuit (Except 4.0L & 4.6L)
P1645    EVAP Solenoid Output Circuit (4.0L & 4.6L)
P1646    Boost Control Solenoid Control Circuit (Except 4.0L & 4.6L)
P1646    EVAP Vent Valve Output Circuit (4.0L & 4.6L)
P1650    Driver 2 Input Voltage High
P1651    Fan On Relay Control Circuit/Output Driver Module (Quad Driver) 'B' Quickset Fault (Saturn)
P1651    Fan 1 Relay Control Circuit
P1652    Fan 2 Relay Control Circuit (Except Cadillac & Corvette)
P1652    VSS Output Circuit (1996 Corvette)
P1652    Powertrain Induced Chassis Pitch Output Circuit (1997- 98 Corvette)
P1652    Lift/Drive Output Circuit (Cadillac)
P1653    TCS Delivered Torque Control Circuit (Except Caprice, Roadmaster & 1998 3.8L)
P1653    Oil Level Lamp Control Circuit (Caprice, Fleetwood & Roadmaster)
P1653    Fuel Level Output Control Circuit (1998 3.8L)
P1654    A/C Relay Control Circuit (Except 4.0L & 4.6L)
P1654    Cruise Disable Output Circuit (4.0L & 4.6L)
P1655    EVAP Purge Solenoid Control Circuit
P1656    Wastegate Solenoid Control Circuit
P1657    Skip Shift 1-4 Upshift
P1660    Cooling Fan Control Circuits
P1661    MIL Control Circuit
P1662    Speed Control Inhibit Control Circuit
P1663    Alternator Lamp Control Circuit (Except Caprice, Fleetwood & Roadmaster)
P1663    Change Oil Lamp Control Circuit (Caprice, Fleetwood & Roadmaster)
P1664    Skip Shift 1-4 Upshift Lamp Control Circuit
P1665    DBCM/DBTCM Serial Data Circuit (1996-97)
P1665    EVAP Vent Valve Solenoid Control Circuit (1998)
P1667    Reverse Inhibitor Solenoid Control Circuit (1996-97)
P1667    Fuel Pump Speed Control Circuit (1998)
P1670    QDM 4 Circuit
P1671    MIL Control Circuit
P1671    Oil Change Lamp Control Circuit
P1672    Low Engine Oil Level Lamp Circuit
P1673    Engine Hot Lamp Control Circuit
P1674    Tachometer Control Circuit
P1675    EVAP Vent Solenoid Control Circuit
P1676    EVAP Canister Purge Solenoid Control CKT
P1689    TCS Delivered Torque Control Circuit
P1700    MIL Requested By TCM
P1701    MIL Request Circuit
P1740    Torque Management Request Circuits, Transmission & Traction Control (Except Catera)
P1740    Torque Control/Management Request Circuits (Catera)
P1760    Transmission Control Module Supply Voltage Interrupted
P1780    Park Neutral Position Switch Circuit
P1781    Engine Torque Signal Circuit
P1792    ECM To Transmission Control Module Engine Coolant Signal
P1800    ECM To Transmission Control Module Engine Coolant Signal
P1810    ATF Pressure Manual Valve Position Switch Malfunction
P1811    Long Shift & Max Adapt
P1812    TOT Condition
P1814    Torque Converter Overstress
P1819    Internal Mode Switch - No Start
P1820    Internal Mode Switch Circuit 'A' Low
P1822    Internal Mode Switch Circuit 'B' Low
P1823    Internal Mode Switch Circuit 'P' Low
P1825    Internal Mode Switch - Invalid Range
P1826    Internal Mode Switch - Invalid Range
P1835    Kickdown Switch Circuit
P1842    1-2 Shift Solenoid Circuit Low Input
P1843    1-2 Shift Solenoid Circuit High Input
P1845    2-3 Shift Solenoid Circuit Low Input
P1847    2-3 Shift Solenoid Circuit High Input
P1850    Brake Band Apply Solenoid
P1860    TCC PWM Solenoid Circuit
P1864    TCCEnable Solenoid Circuit
P1868    Transmission Fluid Life
P1870    Trans Component Slipping
P1873    Torque CONV Stator Temp Switch Circuit Low
P1874    Torque CONV Stator Temp Switch Circuit High
P1875    4WD Low Switch Circuit Electrical
P1886    Transaxle Shift, Timing Solenoid Performance
P1887    TCCRelease Switch Malfunction
P1890    Throttle Position Signal Input
P1895    Engine Torque Delivered Circuit

Code Lists at: P Codes and VIN 5 Codes at
Codes in Spanish at

last updated 12 Mar 2005