85 GM Specific Codes P11XX Fuel and Air Metering P1106 MAP Sensor Circuit Intermittent High Voltage P1107 MAP Sensor Circuit Intermittent Low Voltage P1108 BARO to MAP Signal Comparison Too High P1111 IAT Sensor Circuit Intermittent High Voltage (Low Temperature) P1112 IAT Sensor Circuit Intermittent Low Voltage (High Temperature) P1114 ECT Sensor Circuit Intermittent Low Voltage (High Temperature) P1115 ECT Sensor Circuit Intermittent High Voltage (Low Temperature) P1121 TP Sensor Circuit Intermittent High Voltage P1122 TP Sensor Circuit Intermittent Low Voltage P1125 Accelerator Pedal Position Sensor System Fault P1133 HO 2 S1 Insufficient Switches (Bank 1 Sensor 1) P1134 HO 2 S1 Transition Time Ratio (Bank 1 Sensor 1) P1139 HO 2 S2 Insufficient Switching (Bank 1 Sensor 2) P1140 HO 2 S2 Transmission Time Ratio (Bank 1 Sensor 2) P1153 HO 2 S1 Insufficient Switches (Bank 2 Sensor 1) P1154 HO 2 S1 Transition Time Ratio (Bank 2 Sensor 1) P1158 HO 2 S2 Shifted Rich (Bank 2 Sensor 2) P1171 Fuel System Lean During Acceleration P1187 Engine Oil Temperature Sensor Low Voltage P1188 Engine Oil Temperature Sensor High Voltage P12XX Fuel and Air Metering P1200 P1214 P1215 P1216 P1217 P1218 P1221 P1222 P1250 P1257 P1257 P1258 Fuel Injector Circuit Fault Fuel Injector Pump Timing Offset Generator GFD Fault Fuel Solenoid Response Time Too Short Fuel Solenoid Response Time Too Long Injection Pump Calibration Circuit Fault Fuel Injector Secondary System Circuit Low Input Fuel Injector Control Circuit Intermittent Early Fuel Evaporation (EFE) Heater Circuit Fault Boost Control Circuit Fault Supercharger System Overboost Fault Engine Metal Over-Temperature Protection
86 SCAN TOOL DIAGNOSIS P13XX Ignition System or Misfire P1300 P1320 P1323 P1335 P1345 P1350 P1351 P1351 P1352 P1361 P1370 P1371 P1374 P1375 P1376 P1377 P1380 P1381 Ignition Control Module (Igniter) Circuit ICM 4x Reference Circuit Intermittent, No Pulses ICM 24x Reference Circuit Low Frequency Crankshaft Position Sensor Circuit Camshaft to Crankshaft Position Correlation Fault IC System, Bypass Line Monitor Fault Ignition Control Module Circuit High Voltage Ignition Control Circuit 1 & 4, Short-to-Voltage Ignition Control Circuit 2 & 3, Short-to-Voltage Ignition Control Not Toggling After Enable (Low Voltage) IC Module 4x Reference Circuit Too Many Pulses IC Module 4x Reference Circuit Too Few Pulses IC Module 3x Reference Circuit Fault IC Module 24x Reference Circuit High Voltage IC Module Ignition Ground Circuit Fault ICM CMP Pulse to 4x Reference Pulse Comparison EBTCM DTC Detected, Rough Road Data Unusable Engine Misfire Detected, No EBTCM/PCM Serial Data P14XX Auxiliary Emission Controls P1401 Exhaust Gas Recirculation Flow Test Fault P1403 Exhaust Gas Recirculation Error (EGR No. 1) P1404 Exhaust Gas Recirculation Error (EGR No. 2) P1405 Exhaust Gas Recirculation Error (EGR No. 3) P1406 EGR Valve Pintle Position Circuit Fault P1410 Fuel Tank Pressure System Fault P1415 Secondary Air Injection System (Bank 1) P1416 Secondary Air Injection System (Bank 2) P1441 EVAP Control System Flow During Non-Purge P1442 EVAP Vacuum Switch High Voltage at Ignition On P1450 Barometric Pressure Sensor Circuit Fault P1451 Barometric Pressure Sensor Performance P1460 Cooling Fan Control System Fault
87 P15XX Vehicle Speed Control and Idle Control System P1500 P1508 P1509 P1510 P1520 P1524 P1526 P1530 P1530 P1531 P1532 P1533 P1535 P1536 P1537 P1538 P1539 P1540 P1542 P1543 P1545 P1546 P1550 P1554 P1555 P1558 P1560 P1561 P1562 P1564 P1565 P1566 P1567 Starter Signal Circuit Fault Idle Air Control System Low RPM; Valve Stuck Closed Idle Air Control System High RPM; Valve Stuck Open Backup Power Supply Fault Park Neutral Position Switch Circuit Fault TP Learned Closed Throttle Degrees Out-of-Range TP Sensor Learn Not Completed Ignition Timing Adjustment Switch Circuit Air Conditioning Refrigerant Pressure Sensor Error Low Air Conditioning Refrigerant Charge A/C Evaporative Temperature Sensor Circuit Low Voltage A/C Evaporative Temperature Sensor Circuit High Voltage A/C High Side Temperature Sensor Circuit Fault A/C System, ECT Sensor Over-Temperature A/C Request Circuit Voltage Low A/C Request Circuit Voltage High A/C High Pressure Switch High Voltage A/C System High Pressure A/C System, High Pressure/High Temperature A/C System Performance A/C Clutch Relay Control Circuit A/C Clutch Status Circuit Low Voltage Stepper Motor Cruise Control Fault Cruise Engaged Circuit High Voltage Electronic Variable Orifice Fault Cruise Control System, SPS Circuit Indicated Low Cruise Control System, Transaxle Not in Drive Cruise Vent Solenoid Circuit Fault Cruise Vacuum Solenoid Circuit Fault Cruise Control, Vehicle Acceleration Too High Cruise Servo Position Sensor Fault Cruise Control System, Engine RPM Too High Cruise Switches Circuit Fault
88 SCAN TOOL DIAGNOSIS P15XX Vehicle Speed Control and Idle Control System (continued) P1568 P1570 P1571 P1572 P1573 P1754 P1575 P1576 P1577 Cruise Control System, SPS Circuit Indicated High Cruise Control System, Traction Control Active Traction Control System, PWM Circuit No Frequency; Desired Torque Out-of-Range Traction Control System, Circuit Low Too Long TCS, Loss of ABS/TCS Serial Data EBTCM Stop Lamp Switch Circuit High Voltage Extended Travel Brake Switch, Circuit High Voltage Brake Booster Vacuum Sensor Circuit High Voltage Brake Booster Vacuum Sensor Circuit Low Voltage P15XX Vehicle Speed Control and Idle Control System (continued) P1578 P1579 P1580 P1581 P1582 P1583 P1584 P1599 P1599 Brake Booster Vacuum Sensor Circuit Low Vacuum P/N to Drive or Reverse at High Throttle Angle Cruise Control Module Move Circuit, Low Voltage Cruise Control Module Move Circuit, High Voltage Cruise Control Module Direction Low Voltage Cruise Control Direction Circuit High Voltage Cruise Control Disabled Cruise Power Management Mode Enabled Engine Stall Or Near Stall Detected
89 P16XX Computer and Output Circuits P1600 P1601 P1602 P1603 P1604 P1605 P1610 P1611 P1619 P1620 P1621 P1623 P1623 P1624 P1625 P1626 P1627 P1628 P1629 P1630 P1631 P1632 P1633 P1634 P1635 P1637 P1638 P1639 P1639 P1640 P1641 P1641 P1642 P1642 PCM (ECM) Battery Circuit Fault PCM Serial Communications Fault Loss of EBTCM Serial Data; ABS Message Fault Loss of Sensing Diagnostic Mode Data Loss of IPC Serial Data Loss of HVAC Serial Data Loss of Platform Zone Module (PZM) Serial Data Loss of CVRTD Serial Data Engine Oil Reset Monitor Circuit Fault Engine Coolant, Low Coolant Lever PCM Memory Performance Error PCM PROM Error Transaxle Temperature Pullup Resistor Fault Customer Snapshot Data Available TCM Flash Checksum Fault Theft Deterrent Signal Not Present, Engine Running ECM/PCM Analog-to-Digital (A/D) Converter Fault PCM Engine Control Temp Pullup Resistor Fault Theft Deterrent Signal Not Present, Engine Cranking Theft Deterrent System, PCM in Learn Mode Theft Deterrent System, Password Incorrect Theft Deterrent System, Fuel Disabled Ignition Supplement Power Circuit Low Voltage Ignition 1 Power Circuit Low Voltage PCM 5-Volt Reference Circuit Error Generator L Terminal Circuit Fault Generator F Terminal Circuit Fault 5-Volt Reference B Circuit Fault TCM Analog-to-Digital (A/D) Converter Fault Output Driver Module A Circuit Fault Fan Control Relay 1 Control Unit Quad Driver Module A Quickset Fault Detected Fan Control Relay 2 and 3 Control Circuit Vehicle Speed Output Circuit Fault
90 SCAN TOOL DIAGNOSIS P16XX Computer and Output Circuits (continued) P1642 P1643 P1643 P1644 P1645 P1645 P1650 P1651 P1651 P1652 P1652 P1652 P1653 P1653 P1653 P1654 P1654 P1654 P1655 P1655 P1656 P1657 P1660 P1660 P1661 P1662 P1663 P1664 P1667 P1670 P1672 P1673 P1675 P1691 Secondary AIR System Control Circuit Fault Engine Speed (RPM) Output Circuit Fuel Pump PWM Control Circuit Delivered Torque Output Circuit Fault EVAP Solenoid Output Circuit Fault Boost Control Solenoid Circuit Fault Output Driver Module B Circuit Fault Fan 1 Control Relay Circuit Fault Quad Driver Module B Quickset Fault Detected Vehicle Speed Sensor Output Circuit Fault Fan 2 Relay Control Circuit Fault Lift/Drive Output Circuit Fault Oil Level Lamp Control Circuit Fault ETCS Torque Control Circuit Fault EGR Vent Solenoid Control Circuit Fault A/C Relay Control Circuit Fault Service Throttle Soon Control Circuit Fault Cruise Disable Output Circuit Fault EVAP Purge Solenoid Control Circuit Fault EGR Solenoid Control Circuit Fault Wastegate Solenoid Control Circuit Fault Skip Shift 1 to 4 Upshift System Control Circuit Cooling Fan Control Circuit Fault TCM Generator Field Driven (GFD) Device Fault MIL Control Circuit Fault Cruise Control Inhibit Control Circuit Fault Change Oil Lamp Control Circuit Skip Shift 1-4 Upshift Lamp Control Circuit Reverse Inhibit Solenoid Control Circuit Output Driver Module 4 Circuit Fault Low Engine Oil Level Lamp Control Circuit Engine Hot Lamp Control Circuit EVAP Vent Solenoid Control Circuit Coolant Gauge Circuit Fault
91 P16XX Computer and Output Circuits (continued) P1693 P1695 P1697 Tachometer Circuit Fault Remote Keyless Entry Circuit Low Remote Keyless Entry Circuit High P17XX Transmission P1780 Park/Neutral Position (PNP) Switch Fault P18XX Non-Computer Controlled Powertrain P1810 P1811 P1812 P1814 P1860 P1864 P1870 P1871 P1875 P1875 P1886 Transmission Pressure Switch Assembly Fault Long Shift and Maximum Adaptive Transmission Fluid Over Temperature Torque Converter Overstress TCC PWM Solenoid Electrical Fault TCC Enable Solenoid Electrical Fault Transmission Component Slipping Undefined Gear Ratio Transmission 4WD Low Switch (Mechanical Shift) Transmission 4WD Low Switch (Electrical Shift) 3 2 Timing Solenoid Performance