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DTC Code Glossary

Look up any of the 8,033 OBD-II diagnostic trouble codes in our database — what it means, and how we can permanently remove it from your ECU.

All P B C U
P0518
Idle Air Control Circuit Intermittent
P0519
Idle Air Control System Performance
P051A
Crankcase Pressure Sensor A Circuit
P051B
Crankcase Pressure Sensor A Circuit Range/Performance
P051C
Crankcase Pressure Sensor A Circuit Low
P051D
Crankcase Pressure Sensor A Circuit High
P051E
Crankcase Pressure Sensor A Circuit Intermittent/Erratic
P051F
PCV Filter Restriction
P0520
Engine Oil Pressure Sensor/Switch A Circuit
P0521
Engine Oil Pressure Sensor/Switch A Range/Performance
P0522
Engine Oil Pressure Sensor/Switch A Low
P0523
Engine Oil Pressure Sensor/Switch A High
P0524
Engine Oil Pressure Too Low
P0525
Cruise Control Servo Control Circuit Range/Performance
P0526
Fan Speed Sensor Circuit
P0527
Fan Speed Sensor Circuit Range/Performance
P0528
Fan Speed Sensor Circuit No Signal
P0529
Fan Speed Sensor Circuit Intermittent
P052A
Cold Start A Camshaft Position Timing Over-Advanced Bank 1
P052B
Cold Start A Camshaft Position Timing Over-Retarded Bank 1
P052C
Cold Start A Camshaft Position Timing Over-Advanced Bank 2
P052D
Cold Start A Camshaft Position Timing Over-Retarded Bank 2
P052E
PCV Regulator Valve Performance
P052F
Glow Plug Control Module 1 System Voltage
P0530
A/C Refrigerant Pressure Sensor A Circuit
P0531
A/C Refrigerant Pressure Sensor A Circuit Range/Performance
P0532
A/C Refrigerant Pressure Sensor A Circuit Low
P0533
A/C Refrigerant Pressure Sensor A Circuit High
P0534
A/C Refrigerant Charge Loss
P0535
A/C Evaporator Temperature Sensor Circuit
P0536
A/C Evaporator Temperature Sensor Circuit Range/Performance
P0537
A/C Evaporator Temperature Sensor Circuit Low
P0538
A/C Evaporator Temperature Sensor Circuit High
P0539
A/C Evaporator Temperature Sensor Circuit Intermittent
P053A
PCV Heater A Control Circuit /Open
P053B
PCV Heater A Control Circuit Low
P053C
PCV Heater A Control Circuit High
P053D
PCV Heater A Performance
P053E
Crankcase Pressure Too High
P053F
Cold Start Fuel Pressure Performance Bank 1
P0540
Intake Air Heater A Circuit
P0541
Intake Air Heater A Circuit Low
P0542
Intake Air Heater A Circuit High
P0543
Intake Air Heater A Circuit Open
P0544
Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1
P0545
Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 1
P0546
Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1
P0547
Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 1
P0548
Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1
P0549
Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1
P054A
Cold Start B Camshaft Position Timing Over-Advanced Bank 1
P054B
Cold Start B Camshaft Position Timing Over-Retarded Bank 1
P054C
Cold Start B Camshaft Position Timing Over-Advanced Bank 2
P054D
Cold Start B Camshaft Position Timing Over-Retarded Bank 2
P054E
Idle Control System - Fuel Quantity Lower Than Expected
P054F
Idle Control System - Fuel Quantity Higher Than Expected
P0550
Power Steering Pressure Sensor/Switch Circuit
P0551
Power Steering Pressure Sensor/Switch Circuit Range/Performance
P0552
Power Steering Pressure Sensor/Switch Circuit Low
P0553
Power Steering Pressure Sensor/Switch Circuit High
P0554
Power Steering Pressure Sensor/Switch Circuit Intermittent
P0555
Brake Booster Pressure Sensor Circuit
P0556
Brake Booster Pressure Sensor Circuit Range/Performance
P0557
Brake Booster Pressure Sensor Circuit Low
P0558
Brake Booster Pressure Sensor Circuit High
P0559
Brake Booster Pressure Sensor Circuit Intermittent
P055A
Engine Oil Pressure Sensor/Switch B Circuit
P055B
Engine Oil Pressure Sensor/Switch B Range/Performance
P055C
Engine Oil Pressure Sensor/Switch B Low
P055D
Engine Oil Pressure Sensor/Switch B High
P055E
Oxygen Sensor Control Module System Voltage
P055F
Engine Oil Pressure Out of Range
P0560
System Voltage
P0561
System Voltage Unstable
P0562
System Voltage Low
P0563
System Voltage High
P0564
Cruise Control Multi-Function Input A Circuit
P0565
Cruise Control On Signal
P0566
Cruise Control Off Signal
P0567
Cruise Control Resume Signal
P0568
Cruise Control Set Signal
P0569
Cruise Control Coast Signal
P056A
Cruise Control Increase Distance Signal
P056B
Cruise Control Decrease Distance Signal
P056C
Cruise Control Cancel Signal
P056D
Reductant Control Module System Voltage
P056E
Cold Start Turbocharger/Supercharger Boost Control A Performance
P056F
Cold Start Turbocharger/Supercharger Boost Control B Performance
P0570
Cruise Control Accelerate Signal
P0571
Brake Switch A Circuit
P0572
Brake Switch A Circuit Low
P0573
Brake Switch A Circuit High
P0574
Cruise Control System - Vehicle Speed Too High
P0575
Cruise Control Input Circuit
P0576
Cruise Control Input Circuit Low
P0577
Cruise Control Input Circuit High
P0578
Cruise Control Multi-Function Input A Circuit Stuck
P0579
Cruise Control Multi-Function Input A Circuit Range/Performance
P057A
Brake Pedal Position Sensor A Circuit/Open
P057B
Brake Pedal Position Sensor A Circuit Range/Performance