01 Car Sensors Explained: What They Are, How They Work, and Wh… • 02 What Happens When You Press the Start Push Button While the… • 03 P0482 – Cooling Fan Relay 3 Fault: Engine Temperature Issues • 04 Jumpstarting with a Hybrid Car: Everything You Need to Know • 05 Smooth Shifting: Navigating Common Transmission Problems an… • 06 P0042, P0043, and P0044: H02S heater control circuit (Bank … • 07 Why Your Car Shakes at Idle but Smooths Out While Driving • 08 How to Troubleshoot Car Wiring Problems: A Guide for Begin… • 09 The Importance of Timing Belt Replacement: Preventing Engin… • 10 Understanding Engine Thermostat: A Comprehensive Guide •

DTC codes / GM diagnostic trouble codes

GM diagnostic trouble codes

Codes GM defines for its own vehicles. Other makes use the same numbers for different faults, so check that the code was read from a GM vehicle.

P1531 GM: A/C Low Side Temperature Sensor Circuit Powertrain P1532 GM: A/C Evaporator Temperature Sensor Circuit Low Voltage Powertrain P1533 GM: A/C Low Side Temperature Sensor Circuit Powertrain P1534 GM: A/C High Side Temperature Sensor Low Voltage Powertrain P1535 GM: A/C High Side Temperature Sensor Circuit Powertrain P1536 GM: A/C System ECT Overtemperature Powertrain P1537 GM: A/C Request Circuit Voltage Low Powertrain P1538 GM: A/C Request Circuit Voltage High Powertrain P1539 GM: Air Conditioning (A/C) Clutch Feedback Circuit High Voltage Powertrain P1540 GM: A/C System High Pressure Powertrain P1541 GM: A/C High Side Over Temperature Powertrain P1542 GM: A/C System High Pressure High Temperature Powertrain P1543 GM: A/C System Performance Powertrain P1544 GM: A/C Refrigerant Condition Very Low Powertrain P1545 GM: A/C Clutch Relay Control Circuit Powertrain P1546 GM: Air Conditioning (A/C) Clutch Feedback Circuit Low Voltage Powertrain P1547 GM: A/C System Performance Degraded Powertrain P1548 GM: A/C Recirculation Circuit Powertrain P1550 GM: Cruise Control Motor Actuator Circuit Powertrain P1554 GM: Cruise Engaged Circuit High Voltage Powertrain P1555 GM: Electronic Variable Orifice Output Powertrain P1558 GM: Cruise Control Servo Indicates Low Powertrain P1559 GM: Cruise Control Power Management Mode Powertrain P1560 GM: Cruise Control System Transaxle Not In Drive Powertrain P1561 GM: Cruise Vent Solenoid Powertrain P1562 GM: Cruise Vacuum Solenoid Powertrain P1563 GM: Cruise Vehicle Speed Set Speed Difference Too High Powertrain P1564 GM: Cruise Control System Vehicle Accel Too High Powertrain P1565 GM: Cruise Servo Position Sensor Powertrain P1566 GM: Speed Control System/Engine RPM Too High Powertrain P1567 GM: Cruise Control System Active Braking Control Active Powertrain P1568 GM: Cruise Servo Stroke Greater Than Commanded In Cruise Powertrain P1569 GM: Cruise Servo Stroke High While Not In Cruise Powertrain P1570 GM: Cruise Control System Traction Control Active Powertrain P1571 GM: TCS PWM Circuit No Frequency Powertrain P1572 GM: ASR Active Circuit Low Too Long Powertrain P1573 GM: PCM EBTCM Serial Data Circuit Powertrain P1574 GM: Stoplamp Switch Circuit Powertrain P1575 GM: Extended Travel Brake Switch Circuit Powertrain P1576 GM: Brake Booster Vacuum Sensor Circuit High Voltage Powertrain P1577 GM: Brake Booster Vacuum Sensor Circuit Low Voltage Powertrain P1578 GM: Brake Booster Vacuum Sensor Low Vacuum Powertrain P1579 GM: P/N To D/R At High Throttle Angle Powertrain P1580 GM: Cruise Move Circuit Low Voltage Powertrain P1581 GM: Cruise Move Circuit High Voltage Powertrain P1582 GM: Cruise Direction Circuit Low Voltage Powertrain P1583 GM: Cruise Direction Circuit High Volume Powertrain P1584 GM: Cruise Control Disabled Powertrain P1585 GM: Cruise Inhibit Control Circuit Powertrain P1586 GM: Cruise Control Brake Switch 2 Circuit Powertrain P1587 GM: Cruise Control Clutch Control Circuit Low Powertrain P1588 GM: Cruise Control Clutch Control Circuit High Powertrain P1594 GM: Charging System Voltage Too High Powertrain P1595 GM: Speed Control Solenoid Circuit Open Or Shorted Powertrain P1596 GM: Speed Control Switch Always High Powertrain P1597 GM: Speed Control Switch Always Low Powertrain P1598 GM: A/C Pressure Sensor Voltage Too High Powertrain P1599 GM: Engine Stall Detected Powertrain P1600 GM: PCM Battery Loss / TCM Communication Loss Powertrain P1601 GM: ECM Over-Temperature Powertrain
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