Buick fault codes: probable meanings
Codes specific to Buick (often P1xxx, B1xxx, C1xxx, U1xxx). The manufacturer does not publish these meanings: they come from an open database and remain probable. The same code can have another meaning depending on the model or the year.
Codes: 402, from smallest to largest.
| Code | Probable meaning |
|---|---|
| P1031 | HO2S Heater Current Monitor Control Circuit Sensors 1 |
| P1032 | HO2S Heater Warm Up Control Circuit Sensors 1 |
| P1105 | Secondary Vacuum Sensor Circuit |
| P1106 | MAP Sensor Circuit Intermittent High Voltage |
| P1107 | MAP Sensor Circuit Intermittent Low Voltage |
| P1108 | BARO To MAP Sensor Circuit Comparison Too High |
| P1109 | Secondary Port Throttle System |
| P1111 | Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage |
| P1112 | Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage |
| P1113 | Intake Resonance Switchover Valve Circuit |
| P1114 | Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage |
| P1115 | Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage |
| P1116 | ECT Signal Unstable Or Intermittent |
| P1117 | Engine Coolant Temp Signal Out-Of-Range Low |
| P1118 | Engine Coolant Temp Signal Out-Of Range High |
| P1119 | ECT Signal Out Of Rage With TFT Sensor |
| P1120 | Throttle Position (TP) Sensor 1 Circuit |
| P1121 | TP Sensor Circuit Intermittent High Voltage |
| P1122 | TP Sensor Circuit Intermittent Low Voltage |
| P1125 | Accelerator Pedal Position (APP) System |
| P1130 | HO2S Circuit Low Variance Bank 1 Sensor 1 |
| P1131 | HO2S Circuit Low Variance Bank 1 Sensor 2 |
| P1132 | H02S Circuit Low Variance Bank 2 Sensor 1 |
| P1133 | HO2S Insufficient Switching |
| P1134 | HO2S Transition Time Ratio |
| P1135 | HO2S Lean Average Bank 1 Sensor 1 |
| P1136 | HO2S Rich Average Bank 1 Sensor 1 |
| P1137 | HO2S Bank 1 Sensor 2 Lean Or Low Voltage |
| P1138 | HO2S Bank 1 Sensor 2 Rich Or High Voltage |
| P1139 | HO2S Insufficient Switching Bank 1 Sensor 2 |
| P1140 | HO2S Transition Time Ratio Bank 1 Sensor 2 |
| P1141 | HO2S Bank 1 Sensor 2 Average Voltage Level |
| P1143 | HO2S Bank 1 Sensor 3 Lean Or Low Voltage |
| P1144 | HO2S Bank 1 Sensor 3 Rich Or High Voltage |
| P1145 | HO2S Cross Counts Bank 1 Sensor 3 |
| P1153 | HO2S Insufficient Switching |
| P1154 | HO2S Transition Time Ratio |
| P1155 | HO2S Lean Average Bank 2 Sensor 1 |
| P1156 | HO2S Rich Average Bank 2 Sensor 1 |
| P1157 | HO2S Bank 2 Sensor 2 Lean System Or Low Voltage |
| P1158 | HO2S Bank 2 Sensor 2 Rich Or High Voltage |
| P1159 | HO2S Cross Counts Bank 2 Sensor 2 |
| P1161 | HO2S Heater Power Stage Circuit Bank 2 Sensor 2 |
| P1163 | HO2S Bank 2 Sensor 3 Lean System Or Low Voltage |
| P1164 | HO2S Bank 2 Sensor 3 Rich Or High Voltage |
| P1165 | HO2S Cross Counts Bank 2 Sensor 2 |
| P1170 | Bank To Bank Fuel Trim Offset |
| P1171 | Fuel System Lean During Acceleration |
| P1185 | Engine Oil Temperature Circuit |
| P1186 | EOT Circuit Performance |
| P1187 | EOT Sensor Circuit Low Voltage |
| P1188 | EOT Sensor Circuit High Voltage |
| P1189 | Engine Oil Pressure Switch Circuit |
| P1190 | Engine Vacuum Leak |
| P1191 | Intake Air Duct Air Leak |
| P1200 | Injector Control Circuit |
| P1201 | (Alternative Fuel) Gas Mass Sensor Circuit Range/Performance |
| P1202 | (AlternativeFuel) Gas Mass Sensor Circuit Low Frequency |
| P1203 | (Alternative Fuel) Gas Mass Sensor Circuit High Frequency |
| P1211 | Mass Air Flow Circuit Intermittent High |
| P1212 | Mass Air Flow Circuit Intermittent Low |
| P1214 | Injection Pump Timing Offset |
| P1215 | Ground Fault Detection Indicated |
| P1216 | Fuel Solenoid Response Time Too Short |
| P1217 | Fuel Solenoid Response Time Too Long |
| P1218 | Injection Pump Calibration Circuit |
| P1219 | Throttle Position Sensor Refernce Voltage |
| P1220 | Throttle Position (TP) Sensor 2 Circuit |
| P1221 | Throttle Position (TP) Sensor 1- 2 Correlation |
| P1222 | Injector Control Circuit Intermittent |
| P1225 | Injector Circuit Cylinder 2 Intermittent |
| P1228 | Injector Circuit Cylinder 3 Intermittent |
| P1231 | Injector Circuit Cylinder 4 Intermittent |
| P1234 | Injector Circuit Cylinder 5 Intermittent |
| P1237 | Injector Circuit Cylinder 6 Intermittent |
| P1240 | Injector Circuit Cyllinder 7 Intermittent |
| P1243 | Injector Circuit Cylinder 8 Intermittent |
| P1245 | Intake Plenum Switchover Valve |
| P1250 | Early Fuel Evaporation Heater Circuit |
| P1257 | Supercharger System Overboost |
| P1258 | Engine Coolant Overtemperature Protection Mode Active |
| P1260 | Last Test Failed SCC Or Theft Detected, Vehicle Immobilized |
| P1270 | Accelerator Pedal Position Sensor A/D Converter Error |
| P1271 | APP Sensor 1-2 Performance |
| P1272 | Accelerator Pedal Position Sensor 2 |
| P1273 | Accelerator Pedal Position Sensor 1 |
| P1274 | Injectors Wired Incorrectly |
| P1275 | Accelerator Pedal Position (APP) Sensor 1 Circuit |
| P1276 | Accelerator Pedal Position (APP) Sensor 1 Performance |
| P1277 | Accelerator Pedal Position Sensor 1 Circuit Low Voltage |
| P1278 | Accelerator Pedal Position Sensor 1 Circuit High Voltage |
| P1280 | Accelerator Pedal Position (APP) Sensor 2 Circuit |
| P1281 | Accelerator Pedal Position (APP) Sensor 2 Performance |
| P1282 | Accelerator Pedal Position Sensor 2 Circuit Low Voltage |
| P1283 | Accelerator Pedal Position Sensor 2 Circuit High Voltage |
| P1285 | Accelerator Pedal Position (APP) Sensor 3 Circuit |
| P1286 | Accelerator Pedal Position (APP) Sensor 3 Performance |
| P1287 | Accelerator Pedal Position Sensor 3 Circuit Low Voltage |
| P1288 | Accelerator Pedal Position Sensor 3 Circuit High Voltage |
| P1300 | Ignitor Circuit |
| P1305 | Ignition Coil 2 Primary Feedback Circuit |
| P1310 | Ignition Coil 3 Primary Feedback Circuit |
| P1315 | Ignition Coil 4 Primary Feedback Circuit |
| P1320 | IC Module 4X Ref Circuit Intermittent, No Pulses |
| P1321 | Electronic Ignition System Fault Line |
| P1322 | EI System Or Ignition Control Missing |
| P1323 | 24X Reference Circuit Low Frequency |
| P1324 | Crank RPM Too Low |
| P1335 | CKP Circuit |
| P1336 | Crankshaft Position (CKP) System Variation Not Learned |
| P1345 | CKP/CMP Correlation |
| P1346 | Intake Camshaft Position (CMP) Sensor System Performance |
| P1350 | Ignition Contol System |
| P1351 | IC Circuit High Voltage |
| P1352 | IC Output High/Pulse Detected When Grounded Cyl.2 |
| P1353 | IC Output High/Pulse Detected When Grounded Cyl.3 |
| P1354 | IC Output High/Pulse Detected When Grounded Cyl.4 |
| P1355 | IC Output High/Pulse Detected When Grounded Cyl.5 |
| P1356 | IC Output High/Pulse Detected When Grounded Cyl.6 |
| P1357 | IC Output High/Pulse Detected When Grounded Cyl.7 |
| P1358 | IC Output High/Pulse Detected When Grounded Cyl.8 |
| P1359 | Ignition Control Circuit Group A |
| P1360 | Ignition Control Circuit Group B |
| P1361 | IC Circuit Low Voltage |
| P1362 | IC Cylinder 2 Not Toggling After Enable |
| P1363 | IC Cylinder 3 Not Toggling After Enable |
| P1364 | IC Cylinder 4 Not Toggling After Enable |
| P1365 | IC Cylinder 5 Not Toggling After Enable |
| P1366 | IC Cylinder 6 Not Toggling AFter Enable |
| P1367 | IC Cylinder 7 Not Toggling After Enable |
| P1368 | IC Cylinder 8 Not Toggling After Enable |
| P1370 | IC Module 4X Reference Circuit, Too Many Pulses |
| P1371 | DI Low Resolution Circuit |
| P1372 | Crankshaft Position Sensor Circuit Performance |
| P1374 | 3X Reference Circuit |
| P1375 | 24X Reference Circuit High Voltage |
| P1376 | Ignition Ground Circuit |
| P1377 | IC Module CAM Pulse To 4X Reference Pulse Comparison |
| P1380 | Misfire Detected Rough Road Data Not Available |
| P1381 | Misfire Detected No Communication with Brake Control Module |
| P1390 | Wheel Speed Sensor 1, G-Sensor Circuit |
| P1391 | Wheel Speed Sensor 1, G-Sensor Circuit Performance |
| P1392 | Wheel Speed Sensor 1, G-Sensor Circuit Low Voltage |
| P1393 | Wheel Speed Sensor 1, G-Sensor Circuit High Voltage |
| P1394 | Wheel Speed Sensor 1, G-Sensor Circuit Intermittent |
| P1395 | Wheel Speed Sensor 2, G-Sensor Circuit |
| P1396 | Wheel Speed Sensor 2, G-Sensor Circuit Performance |
| P1397 | Wheel Speed Sensor 2, G-Sensor Circuit Low Voltage |
| P1398 | Wheel Speed Sensor 2, G-Sensor Circuit High Voltage |
| P1399 | Wheel Speed Sensor 2, G-Sensor Circuit Intermittent |
| P1403 | Exhaust Gas Recirculation System Valve 1 |
| P1404 | Exhaust Gas Recirculation System Valve 2 |
| P1405 | Exhaust Gas Recirculation System Valve 3 |
| P1406 | EGR Valve Pintle Position Circuit |
| P1407 | EGR Air Intrusion In Exhaust Supply To EGR Valve |
| P1408 | Intake Manifold Pressure Sensor Circuit |
| P1409 | EGR Vacuum System Leak |
| P1410 | Fuel Tank Pressure System |
| P1415 | Secondary Air Injection (AIR) System |
| P1416 | AIR System Bank 1 |
| P1418 | Secondary Air Injection System Relay A Control Circuit High |
| P1420 | Intake Air Low Pressure Switch Circuit Low Voltage |
| P1421 | Intake Air Low Pressure Switch Circuit High Voltage |
| P1423 | Intake Air High Pressure Switch Circuit High Voltage |
| P1431 | Fuel Level Sensor 2 Performance |
| P1432 | Fuel Level Sensor 2 Circuit Low Voltage |
| P1433 | Fuel Level Sensor 2 Circuit High Voltage |
| P1441 | Evaporative Emission (EVAP) System Flow During Non-Purge |
| P1442 | EVAP Vacuum Switch High Voltage During Ignition On |
| P1450 | Barometric Pressure Sensor Circuit |
| P1451 | Barometric Pressure Sensor Performance |
| P1460 | Cooling Fan Control System |
| P1480 | Cooling Fan 1 Control Circuit High |
| P1483 | Engine Coolilng System Performance |
| P1500 | Starter Signal Circuit |
| P1501 | Vehicle Speed Sensor Circuit Intermittent |
| P1502 | Theft Deterrent System No Password Received |
| P1503 | Theft Deterrent System Password Incorrect |
| P1504 | Vehicle Speed Output Circuit |
| P1508 | IAC System Low RPM |
| P1509 | IAC System High RPM |
| P1510 | Back UP Power Supply |
| P1511 | Throttle Control System Backup System Performance |
| P1514 | Throttle Body Performance |
| P1515 | Control Module Throttle Actuator Position Performance |
| P1516 | Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance |
| P1517 | Throttle Actuator Control (TAC) Module Performance |
| P1518 | Throttle Actuator Control (TAC) Module Serial Data Circuit |
| P1519 | Electronic Throttle Module Low Volts Communication Disable |
| P1520 | Gear Indicator System |
| P1521 | Transmission Engaged At High Throttle Angle |
| P1522 | Park/Neutral To Drive/Reverse At High RPM |
| P1523 | Electronic Throttle Control Throttle Return |
| P1524 | TP Sensor Learned CI, Throttle Angle Out Of Range |
| P1525 | Throttle Body Service Required |
| P1526 | TP Sensor Learn Not Complete |
| P1527 | Transmission Range/Pressure Switch Comparison |
| P1528 | Governor |
| P1529 | Heated Windshield Request Problem |
| P1530 | Ignition Timing Adjustment Switch Circuit |
| P1531 | A/C Low Side Temerature Sensor Fault |
| P1532 | A/C Evaporator Temperature Sensor Circuit Low Voltage |
| P1533 | A/C Evaporator Temperature Sensor Circuit High Voltage |
| P1534 | A/C High Side Temerature Sensor Low Voltage |
| P1535 | A/C High Side Temperature Sensor Circuit |
| P1536 | A/C System ECT Overtemperature |
| P1537 | A/C Request Circuit Low Voltage |
| P1538 | A/C request Circuit High Voltage |
| P1539 | Air Conditioning (A/C) Clutch Feedback Circuit High Voltage |
| P1540 | A/C System High Pressure |
| P1541 | A/C High Side Over Temperature |
| P1542 | A/C System High Pressure High Temperature |
| P1543 | A/C System Performance |
| P1544 | A/C Refrigerant Condition Very Low |
| P1545 | A/C Clutch Relay Control Circuit |
| P1546 | Air Conditioning (A/C) Clutch Feedback Circuit Low Voltage |
| P1547 | A/C System Performance Degraded |
| P1548 | A/C Recirculation Circuit |
| P1554 | Cruise Engaged Circuit High Voltage |
| P1555 | Electronic Variable Orifice Output |
| P1558 | Cruise Control Servo Indicates Low |
| P1559 | Cruise Control Power Mangement Mode |
| P1560 | Cruise Control System Transaxle Not In Drive |
| P1561 | Cruise Vent Solenoid |
| P1562 | Cruise Vacuum Solenoid |
| P1563 | Cruise Vehicle Speed/Set Speed Difference Too High |
| P1564 | Cruise Control System Vehicle Accel Too High |
| P1565 | Cruise Servo Position Sensor |
| P1566 | Cruise Control System Engine RPM Too High |
| P1567 | Cruise Control System Active Braking Control Active |
| P1568 | Cruise Servo Stroke Greater Than Commanded In Cruise |
| P1569 | Cruise Servo Stroke High While Not In Cruise |
| P1570 | Cruise Control System Traction Control Active |
| P1571 | TCS PWM Circuit No Frequency |
| P1572 | ASR Active Circuit Low Too Long |
| P1573 | PCM/EBTCM Serial Data Circuit |
| P1574 | Stoplamp Switch Circuit |
| P1575 | Extended Travel Brake Switch Circuit |
| P1576 | BBV Sensor Circuit High Voltage |
| P1577 | BBV Sensor Circuit Low Voltage |
| P1578 | BBV Sensor Circuit Low Vacuum |
| P1579 | P/N To D/R At High Throttle Angle |
| P1580 | Cruise Move Circuit Low Voltage |
| P1581 | Cruise Move Circuit High Voltage |
| P1582 | Cruise Direction Circuit Low Voltage |
| P1583 | Cruise Direction Circuit High Volume |
| P1584 | Cruise Control Disabled |
| P1585 | Cruise Inhibit Control Circuit |
| P1586 | Cruise Control Brake Switch 2 Circuit |
| P1587 | Cruise Control Clutch Control Circuit Low |
| P1588 | Cruise Control Clutch Control Circuit High |
| P1599 | Engine Stall Or Near Stall Detected |
| P1600 | PCM Battery |
| P1601 | Serial Communication Problem With Devise 1 |
| P1602 | Loss Of EBTCM Serial Data |
| P1603 | Loss Of SDM Serial Data |
| P1604 | Loss Of IPC Serial Data |
| P1605 | Loss OF HVAX Serial Data |
| P1606 | Serial Communication Problem With Device 6 |
| P1607 | Serial Communication Problem With Devise 7 |
| P1608 | Serial Communication Problem With Device 8 |
| P1609 | Loss Of TCS Serial Data |
| P1610 | Loss Of PZM Serial Data |
| P1611 | Loss Of CVRTD Serial Data |
| P1612 | Loss OF IPM Serial Data |
| P1613 | Loss Of DIM Serial Data |
| P1614 | Loss Of RIM Serial Data |
| P1615 | Loss Of VTD Serial Data |
| P1617 | Engine Oil Level Switch Circuit |
| P1619 | Engine Oil Life Monitor Reset Circuit |
| P1620 | Low Coolant Circuit |
| P1621 | PCM Memory Performance |
| P1622 | Cylinder Select |
| P1623 | Transmission Temp Pull-Up Resistor |
| P1624 | Customer Snapshot Data Available |
| P1625 | PCM System Reset |
| P1626 | Theft Deterrent Fuel Enable Signal Lost |
| P1627 | A/D Performance |
| P1628 | ECT Pull-Up Resistor |
| P1629 | Theft Deterrent System Cranking Signal |
| P1630 | Theft Deterrent Learn Mode Active |
| P1631 | Theft Deterrent Start Enable Signal Not Correct |
| P1632 | Theft Deterrent System Fuel Disabled |
| P1633 | Ignition Supply Power Circuit Low Voltage |
| P1634 | Ignition 1 Power Circuit Low Voltage |
| P1635 | 5 Volt Reference 1 Circuit |
| P1636 | PCM Stack Overrun |
| P1637 | Generator L-Terminal Circuit |
| P1638 | Generator F-Terminal Circuit |
| P1639 | 5 Volt Reference 2 Circuit |
| P1640 | Driver 1 Input High Voltage |
| P1641 | FC Relay 1 Control Circuit |
| P1642 | FC Relay 2 And 3 Control Circuit |
| P1643 | Engine Speed Output Circuit |
| P1644 | TP Output Circuit |
| P1645 | EVAP Solenoid Output Circuit |
| P1646 | Driver 1 Line 6 |
| P1647 | Driver 1 Line 7 |
| P1650 | Driver 2 Input High Voltage |
| P1651 | Fan 1 Relay Control Circuit |
| P1652 | Powertrain Induced Chassis Pitch Output Circuit |
| P1653 | Oil Level Lamp Control Circuit |
| P1654 | Service Throttle Soon Lamp Control Circuit |
| P1655 | EVAP Purge Solenoid Control Circuit |
| P1656 | Driver 2 Line 6 |
| P1657 | 1-4 Upshift Solenoid Control Circuit |
| P1658 | Starter Enable Relay Control Circuit |
| P1660 | Cooling Fans Control Circuit |
| P1661 | MIL Control Circuit |
| P1662 | Cruise Control Inhibit Control Circuit |
| P1663 | Oil Life Lamp Control Circuit |
| P1664 | 1-4 Upshift Lamp Control Circuit |
| P1665 | Driver 3 Line 5 |
| P1666 | Driver 3 Line 6 |
| P1667 | Reverse Inhibit Solenoid Control Circuit |
| P1669 | ABS Unit Expected |
| P1670 | Driver 4 |
| P1671 | Driver 4 Line 1 |
| P1672 | Low Engine Oil Level Lamp Control Circuit |
| P1673 | Engine Hot Lamp Control Circuit |
| P1674 | Tachometer Control Circuit |
| P1675 | EVAP Vent Solenoid Control Circuit |
| P1676 | Driver 4 Line 6 |
| P1677 | Driver 4 Line 7 |
| P1680 | Driver 5 |
| P1681 | Driver 5 Line 1 |
| P1682 | Driver 5 Line 2 |
| P1683 | Driver 5 Line 3 |
| P1684 | Driver 5 Line 4 |
| P1685 | Driver 5 Line 5 |
| P1686 | Driver 5 Line 6 |
| P1687 | Driver 5 Line 7 |
| P1689 | Delivered Torque Circuit Fault |
| P1690 | ECM Loop Overrun |
| P1691 | Coolant Gage Circuit Low Voltage |
| P1692 | Coolant Gage Circuit High Voltage |
| P1693 | Tachometer Circuit Low Voltage |
| P1694 | Tachometer Circuit High Voltag |
| P1695 | Remote Keyless Entry Circuit Low |
| P1696 | Remote Keyless Entry Voltage High |
| P1700 | Transmission MIL Request |
| P1701 | Transmission MIL Request Circuit |
| P1705 | P/N Signal Output Circuit |
| P1740 | Transmission Torque Reduction Request Circuit |
| P1743 | TP Signal From ECM |
| P1760 | ECM Supply Voltage Interrupted |
| P1779 | Engine Torque Delivered To TCM Signal |
| P1780 | Park/Neutral Postion (PNP) Switch Circuit Engine Torque Signal Circuit |
| P1790 | Transmission Control Module Checksum |
| P1791 | Transmission Control Module Loop |
| P1792 | Transmission Control Module Reprogrammable Memory |
| P1793 | Transmission control Module Stack Overrun |
| P1795 | CAN Bus Throttle Body Position |
| P1800 | TCM Power Control Relay Circuit Open |
| P1801 | Performance Selector Switch Failure |
| P1804 | Ground Control Relay |
| P1810 | TFP Valve Position Switch Circuit |
| P1811 | Maximum Adapt And Long Shift |
| P1812 | Transmission Over Temperature Condition |
| P1813 | Torque Control |
| P1814 | Torque Converter Overstressed |
| P1815 | Transmission Range Switch Start In Wrong Range |
| P1816 | TFP Valve Position Switch Park/Neutral With Drive Ratio |
| P1817 | TFP Valve Position Switch Reverse With Drive Ratio |
| P1818 | TFP Valve Position Switch Drive Without Drive Ratio |
| P1819 | Internal Mode Swtich No Start, Wrong Range |
| P1820 | Internal Mode Switch Circuit A Low |
| P1822 | Internal Mode Switch Circuit B High |
| P1823 | Internal Mode Switch Circuit P Low |
| P1825 | Internal Mode Switch Illegal Range |
| P1826 | Internal Mode Switch Circuit C High |
| P1831 | PC Solenoid Power Circuit Low Voltage |
| P1833 | A/T Solenoids Power Circuit Low Voltage |
| P1835 | Kick-Down Switch |
| P1836 | Kick-Down Switch Failed Open |
| P1837 | Kick-Down Switch Failed Short |
| P1842 | 1-2 Shift Solenoid Circuit Low Voltage |
| P1843 | 1-2 Shift Solenoid Circuit High Voltage |
| P1844 | Torque Reduction Signal Circuit Desired By TCM |
| P1845 | Transmission Gear Ratio Output Circuit |
| P1847 | 2-3 Shift Solenoid Circuit High Voltage |
| P1850 | Brake Band Apply Solenoid Circuit |
| P1851 | Brake Band Apply Solenoid Performance |
| P1852 | Brake Band Apply Solenoid Low Voltage |
| P1853 | Brake Band Apply Solenoid High Voltage |
| P1860 | TCC PWM Solenoid Circuit Electrical |
| P1864 | Torque Converter Clutch Circuit |
| P1868 | Transmission Fluid Life |
| P1870 | Transmission Component Slipping |
| P1871 | Undefined Gear Ratio |
| P1873 | TCC Stator Temp. Switch Circuit Low |
| P1874 | TCC Stator Temp. Switch Circuit High |
| P1875 | 4WD Low Switch Circuit |
| P1884 | TCC Enable/Shift Light Circuit |
| P1886 | Shift Timing Solenoid |
| P1887 | TCC Release Switch Circuit |
| P1890 | ECM Data Input Circuit |
| P1891 | Throttle Position Sensor PWM Signal Low |
| P1892 | Throttle Position Sensor PWM Signal High |
| P1893 | Engine Torque Signal Low Voltage |
| P1894 | Engine Torque Signal High Voltage |
| P1895 | TCM To ECM Torque Reduction Circuit |
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Official meanings: OBDex (public domain, CC0). Manufacturer codes: dtc-database (MIT license), probable meanings not verified by the manufacturers. The same meaning can vary depending on the model: always have a diagnosis confirmed by a professional.