
OBD-II · CODE FAMILY
Codes P15xx — what they mean
P15xx is a family of 100 manufacturer-specific OBD2 codes covering powertrain and electrical faults. Each P15xx code below links to its own page with causes, diagnosis and the parts to fix it.
100 codesPowertrain systems

01All codes in this family
One rich, indexed page — not thousands of empty ones. Each code links to its own page.
| Code | Meaning — click to open the code page | System | Severity |
|---|---|---|---|
| P1500 | Idle Speed Control Valve Stuck Open → /auto/codes/p1500/ Idle Speed Control Valve Stuck Open | Powertrain | Medium |
| P1501 | Idle Speed Control Valve Stuck Closed → /auto/codes/p1501/ Idle Speed Control Valve Stuck Closed | Powertrain | Medium |
| P1502 | Idle Speed Control Valve Closing Solenoid Control Circuit Si → /auto/codes/p1502/ Idle Speed Control Valve Closing Solenoid Control Circuit Signal High Or Low | Powertrain | Medium |
| P1503 | Idle Speed Control Valve Closing Solenoid Control Circuit Si → /auto/codes/p1503/ Idle Speed Control Valve Closing Solenoid Control Circuit Signal Low | Powertrain | Medium |
| P1504 | Idle Speed Control Valve Closing Solenoid Control Open Circu → /auto/codes/p1504/ Idle Speed Control Valve Closing Solenoid Control Open Circuit | Powertrain | Medium |
| P1505 | Idle Speed Control Valve Closing Solenoid Control Circuit El → /auto/codes/p1505/ Idle Speed Control Valve Closing Solenoid Control Circuit Electrical | Powertrain | Medium |
| P1506 | Idle Speed Control Valve Open Solenoid Control Circuit Signa → /auto/codes/p1506/ Idle Speed Control Valve Open Solenoid Control Circuit Signal High | Powertrain | Medium |
| P1507 | Idle Speed Control Valve Open Solenoid Control Circuit Signa → /auto/codes/p1507/ Idle Speed Control Valve Open Solenoid Control Circuit Signal Low | Powertrain | Medium |
| P1508 | IAC Valve Circuit Failure → /auto/codes/p1508/ IAC Valve Circuit Failure | Powertrain | Medium |
| P1509 | Idle Speed Control Valve Opening Solenoid Control Circuit El → /auto/codes/p1509/ Idle Speed Control Valve Opening Solenoid Control Circuit Electrical | Powertrain | Medium |
| P1510 | Idle Speed Control Valve Stuck → /auto/codes/p1510/ Idle Speed Control Valve Stuck | Powertrain | Medium |
| P1511 | DISA Control Circuit Electrical → /auto/codes/p1511/ DISA Control Circuit Electrical | Powertrain | Medium |
| P1512 | DISA Control Circuit Signal Low → /auto/codes/p1512/ DISA Control Circuit Signal Low | Powertrain | Medium |
| P1513 | DISA Control Circuit Signal High → /auto/codes/p1513/ DISA Control Circuit Signal High | Powertrain | Medium |
| P1514 | Throttle Body Performance → /auto/codes/p1514/ Throttle Body Performance | Powertrain | Medium |
| P1515 | Control Module Throttle Actuator Position Performance → /auto/codes/p1515/ Control Module Throttle Actuator Position Performance | Powertrain | Medium |
| P1516 | If you drive a GM brand vehicle, it’s not unusual to find th → /auto/codes/p1516/ If you drive a GM brand vehicle, it’s not unusual to find the P1516 code when you use your OBDII scanner to see why the Check Engine Light is on. What | Powertrain | Medium |
| P1517 | Throttle Actuator Control (TAC) Module Performance → /auto/codes/p1517/ Throttle Actuator Control (TAC) Module Performance | Powertrain | Medium |
| P1518 | Throttle Actuator Control (TAC) Module Serial Data Circuit → /auto/codes/p1518/ Throttle Actuator Control (TAC) Module Serial Data Circuit | Powertrain | Medium |
| P1519 | IAC Valve Circuit Failure → /auto/codes/p1519/ IAC Valve Circuit Failure | Powertrain | Medium |
| P1520 | B Camshaft Position Actuator Bank 1 → /auto/codes/p1520/ B Camshaft Position Actuator Bank 1 | Powertrain | Medium |
| P1521 | Transmission Engaged At High Throttle Angle → /auto/codes/p1521/ Transmission Engaged At High Throttle Angle | Powertrain | Medium |
| P1522 | A Camshaft Position Actuator Bank 2 → /auto/codes/p1522/ A Camshaft Position Actuator Bank 2 | Powertrain | Medium |
| P1523 | A Camshaft Position Actuator Signal Low Bank 1 → /auto/codes/p1523/ A Camshaft Position Actuator Signal Low Bank 1 | Powertrain | Medium |
| P1524 | A Camshaft Position Actuator Signal High Bank 1 → /auto/codes/p1524/ A Camshaft Position Actuator Signal High Bank 1 | Powertrain | Medium |
| P1525 | A Camshaft Position Actuator Control Open Circuit Bank 1 → /auto/codes/p1525/ A Camshaft Position Actuator Control Open Circuit Bank 1 | Powertrain | Medium |
| P1526 | A Camshaft Position Actuator Control Open Circuit Bank 2 → /auto/codes/p1526/ A Camshaft Position Actuator Control Open Circuit Bank 2 | Powertrain | Medium |
| P1527 | A Camshaft Position Actuator Control Circuit Signal Low Bank → /auto/codes/p1527/ A Camshaft Position Actuator Control Circuit Signal Low Bank 1 | Powertrain | Medium |
| P1528 | A Camshaft Position Actuator Control Circuit Signal High Ban → /auto/codes/p1528/ A Camshaft Position Actuator Control Circuit Signal High Bank 1 | Powertrain | Medium |
| P1529 | B Camshaft Position Actuator Control Circuit Signal Low Bank → /auto/codes/p1529/ B Camshaft Position Actuator Control Circuit Signal Low Bank 1 | Powertrain | Medium |
| P1530 | B Camshaft Position Actuator Control Circuit Signal High Ban → /auto/codes/p1530/ B Camshaft Position Actuator Control Circuit Signal High Bank 1 | Powertrain | Medium |
| P1531 | B Camshaft Position Actuator Control Open Circuit Bank 1 → /auto/codes/p1531/ B Camshaft Position Actuator Control Open Circuit Bank 1 | Powertrain | Medium |
| P1532 | B Camshaft Position Actuator Control Open Circuit Bank 2 → /auto/codes/p1532/ B Camshaft Position Actuator Control Open Circuit Bank 2 | Powertrain | Medium |
| P1533 | B Camshaft Position Actuator Control Circuit Signal Low Bank → /auto/codes/p1533/ B Camshaft Position Actuator Control Circuit Signal Low Bank 2 | Powertrain | Medium |
| P1534 | B Camshaft Position Actuator Control Circuit Signal High Ban → /auto/codes/p1534/ B Camshaft Position Actuator Control Circuit Signal High Bank 2 | Powertrain | Medium |
| P1535 | A/C High Side Temperature Sensor Circuit → /auto/codes/p1535/ A/C High Side Temperature Sensor Circuit | Powertrain | Medium |
| P1536 | A/C System ECT Overtemperature → /auto/codes/p1536/ A/C System ECT Overtemperature | Powertrain | Medium |
| P1537 | A/C Request Circuit Low Voltage → /auto/codes/p1537/ A/C Request Circuit Low Voltage | Powertrain | Medium |
| P1538 | A/C request Circuit High Voltage → /auto/codes/p1538/ A/C request Circuit High Voltage | Powertrain | Medium |
| P1539 | Air Conditioning (A/C) Clutch Feedback Circuit High Voltage → /auto/codes/p1539/ Air Conditioning (A/C) Clutch Feedback Circuit High Voltage | Powertrain | Medium |
| P1540 | Pedal Position Sensor → /auto/codes/p1540/ Pedal Position Sensor | Powertrain | Medium |
| P1541 | Pedal Position Sensor Double Error → /auto/codes/p1541/ Pedal Position Sensor Double Error | Powertrain | Medium |
| P1542 | Pedal Position Sensor Electrical → /auto/codes/p1542/ Pedal Position Sensor Electrical | Powertrain | Medium |
| P1543 | Pedal Position Sensor → /auto/codes/p1543/ Pedal Position Sensor | Powertrain | Medium |
| P1544 | Pedal Position Sensor → /auto/codes/p1544/ Pedal Position Sensor | Powertrain | Medium |
| P1545 | Pedal Position Sensor → /auto/codes/p1545/ Pedal Position Sensor | Powertrain | Medium |
| P1546 | Pedal Position Sensor → /auto/codes/p1546/ Pedal Position Sensor | Powertrain | Medium |
| P1547 | A/C System Performance Degraded → /auto/codes/p1547/ A/C System Performance Degraded | Powertrain | Medium |
| P1548 | A/C Recirculation Circuit → /auto/codes/p1548/ A/C Recirculation Circuit | Powertrain | Medium |
| P1549 | Intake Manifold Temperature Valve Vacuum Actuator Connection → /auto/codes/p1549/ Intake Manifold Temperature Valve Vacuum Actuator Connection | Powertrain | Medium |
| P1550 | Idle Speed Control Valve Closing Solenoid Control Circuit El → /auto/codes/p1550/ Idle Speed Control Valve Closing Solenoid Control Circuit Electrical | Powertrain | Medium |
| P1551 | A Camshaft Position Actuator Control Open Circuit Bank 1 → /auto/codes/p1551/ A Camshaft Position Actuator Control Open Circuit Bank 1 | Powertrain | Medium |
| P1552 | A Camshaft Position Actuator Control Open Circuit Bank 1 → /auto/codes/p1552/ A Camshaft Position Actuator Control Open Circuit Bank 1 | Powertrain | Medium |
| P1553 | Idle Air Control Valve Opening Coil High Voltage → /auto/codes/p1553/ Idle Air Control Valve Opening Coil High Voltage | Powertrain | Medium |
| P1554 | Cruise Engaged Circuit High Voltage → /auto/codes/p1554/ Cruise Engaged Circuit High Voltage | Powertrain | Medium |
| P1555 | Electronic Variable Orifice Output → /auto/codes/p1555/ Electronic Variable Orifice Output | Powertrain | Medium |
| P1556 | A Camshaft Position Actuator Control Open Circuit Bank 1 → /auto/codes/p1556/ A Camshaft Position Actuator Control Open Circuit Bank 1 | Powertrain | Medium |
| P1557 | Charge Pressure Positive Deviation → /auto/codes/p1557/ Charge Pressure Positive Deviation | Powertrain | Medium |
| P1558 | Cruise Control Servo Indicates Low → /auto/codes/p1558/ Cruise Control Servo Indicates Low | Powertrain | Medium |
| P1559 | Cruise Control Power Mangement Mode → /auto/codes/p1559/ Cruise Control Power Mangement Mode | Powertrain | Medium |
| P1560 | B Camshaft Position Actuator Control Open Circuit Bank 1 → /auto/codes/p1560/ B Camshaft Position Actuator Control Open Circuit Bank 1 | Powertrain | Medium |
| P1561 | Cruise Vent Solenoid → /auto/codes/p1561/ Cruise Vent Solenoid | Powertrain | Medium |
| P1562 | Cruise Vacuum Solenoid → /auto/codes/p1562/ Cruise Vacuum Solenoid | Powertrain | Medium |
| P1563 | Cruise Vehicle Speed/Set Speed Difference Too High → /auto/codes/p1563/ Cruise Vehicle Speed/Set Speed Difference Too High | Powertrain | Medium |
| P1564 | Control Module Selection → /auto/codes/p1564/ Control Module Selection | Powertrain | Medium |
| P1565 | B Camshaft Position Actuator Control Open Circuit Bank 1 → /auto/codes/p1565/ B Camshaft Position Actuator Control Open Circuit Bank 1 | Powertrain | Medium |
| P1566 | Cruise Control System Engine RPM Too High → /auto/codes/p1566/ Cruise Control System Engine RPM Too High | Powertrain | Medium |
| P1567 | Cruise Control System Active Braking Control Active → /auto/codes/p1567/ Cruise Control System Active Braking Control Active | Powertrain | Medium |
| P1568 | Cruise Servo Stroke Greater Than Commanded In Cruise → /auto/codes/p1568/ Cruise Servo Stroke Greater Than Commanded In Cruise | Powertrain | Medium |
| P1569 | A Camshaft Position Actuator Control Open Circuit Bank 2 → /auto/codes/p1569/ A Camshaft Position Actuator Control Open Circuit Bank 2 | Powertrain | Medium |
| P1570 | Cruise Control System Traction Control Active → /auto/codes/p1570/ Cruise Control System Traction Control Active | Powertrain | Medium |
| P1571 | TCS PWM Circuit No Frequency → /auto/codes/p1571/ TCS PWM Circuit No Frequency | Powertrain | Medium |
| P1572 | ASR Active Circuit Low Too Long → /auto/codes/p1572/ ASR Active Circuit Low Too Long | Powertrain | Medium |
| P1573 | PCM/EBTCM Serial Data Circuit → /auto/codes/p1573/ PCM/EBTCM Serial Data Circuit | Powertrain | Medium |
| P1574 | Stoplamp Switch Circuit → /auto/codes/p1574/ Stoplamp Switch Circuit | Powertrain | Medium |
| P1575 | Extended Travel Brake Switch Circuit → /auto/codes/p1575/ Extended Travel Brake Switch Circuit | Powertrain | Medium |
| P1576 | BBV Sensor Circuit High Voltage → /auto/codes/p1576/ BBV Sensor Circuit High Voltage | Powertrain | Medium |
| P1577 | BBV Sensor Circuit Low Voltage → /auto/codes/p1577/ BBV Sensor Circuit Low Voltage | Powertrain | Medium |
| P1578 | BBV Sensor Circuit Low Vacuum → /auto/codes/p1578/ BBV Sensor Circuit Low Vacuum | Powertrain | Medium |
| P1579 | P/N To D/R At High Throttle Angle → /auto/codes/p1579/ P/N To D/R At High Throttle Angle | Powertrain | Medium |
| P1580 | Throttle Valve Mechanically Stuck → /auto/codes/p1580/ Throttle Valve Mechanically Stuck | Powertrain | Medium |
| P1581 | B Camshaft Position Actuator Control Open Circuit Bank 2 → /auto/codes/p1581/ B Camshaft Position Actuator Control Open Circuit Bank 2 | Powertrain | Medium |
| P1582 | Cruise Direction Circuit Low Voltage → /auto/codes/p1582/ Cruise Direction Circuit Low Voltage | Powertrain | Medium |
| P1583 | Cruise Direction Circuit High Volume → /auto/codes/p1583/ Cruise Direction Circuit High Volume | Powertrain | Medium |
| P1584 | Cruise Control Disabled → /auto/codes/p1584/ Cruise Control Disabled | Powertrain | Medium |
| P1585 | Cruise Inhibit Control Circuit → /auto/codes/p1585/ Cruise Inhibit Control Circuit | Powertrain | Medium |
| P1586 | Cruise Control Brake Switch 2 Circuit → /auto/codes/p1586/ Cruise Control Brake Switch 2 Circuit | Powertrain | Medium |
| P1587 | Cruise Control Clutch Control Circuit Low → /auto/codes/p1587/ Cruise Control Clutch Control Circuit Low | Powertrain | Medium |
| P1588 | Cruise Control Clutch Control Circuit High → /auto/codes/p1588/ Cruise Control Clutch Control Circuit High | Powertrain | Medium |
| P1589 | Control Module Self Test Knock Control Test Pulse Bank 1 → /auto/codes/p1589/ Control Module Self Test Knock Control Test Pulse Bank 1 | Powertrain | Medium |
| P1590 | Neutral Position Switch Circuit High Input → /auto/codes/p1590/ Neutral Position Switch Circuit High Input | Powertrain | Medium |
| P1591 | Neutral Position Switch Circuit Low Input → /auto/codes/p1591/ Neutral Position Switch Circuit Low Input | Powertrain | Medium |
| P1592 | Neutral Position Switch Circuit MT Model → /auto/codes/p1592/ Neutral Position Switch Circuit MT Model | Powertrain | Medium |
| P1593 | DISA Control Circuit Electrical → /auto/codes/p1593/ DISA Control Circuit Electrical | Powertrain | Medium |
| P1594 | B Camshaft Position Actuator Control Open Circuit Bank 2 → /auto/codes/p1594/ B Camshaft Position Actuator Control Open Circuit Bank 2 | Powertrain | Medium |
| P1595 | Speed Control Solenoid Circuit Open Or Shorted → /auto/codes/p1595/ Speed Control Solenoid Circuit Open Or Shorted | Powertrain | Medium |
| P1596 | Speed Control Switch Always High → /auto/codes/p1596/ Speed Control Switch Always High | Powertrain | Medium |
| P1597 | Speed Control Switch Always Low → /auto/codes/p1597/ Speed Control Switch Always Low | Powertrain | Medium |
| P1598 | A/C Pressure Sensor Voltage Too High → /auto/codes/p1598/ A/C Pressure Sensor Voltage Too High | Powertrain | Medium |
| P1599 | Engine Stall Or Near Stall Detected → /auto/codes/p1599/ Engine Stall Or Near Stall Detected | Powertrain | Medium |
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