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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
P03EC
A Camshaft Profile Actuator C Control Circuit/Open Bank 1
P03ED
A Camshaft Profile Actuator C Control Circuit Low Bank 1
P03EE
A Camshaft Profile Actuator C Control Circuit High Bank 1
P03EF
A Camshaft Profile Actuator C Control Performance/Stuck Off Bank 1
P03F0
A Camshaft Profile Actuator C Control Stuck On Bank 1
P03F1
B Camshaft Profile Actuator C Control Circuit/Open Bank 1
P03F2
B Camshaft Profile Actuator C Control Circuit Low Bank 1
P03F3
B Camshaft Profile Actuator C Control Circuit High Bank 1
P03F4
B Camshaft Profile Actuator C Control Performance/Stuck Off Bank 1
P03F5
B Camshaft Profile Actuator C Control Stuck On Bank 1
P03F6
B Camshaft Position Actuator Position Sensor C Circuit Bank 1
P03F7
B Camshaft Position Actuator Position Sensor C Range/Performance Bank 1
P03F8
B Camshaft Position Actuator Position Sensor C Circuit Low Bank 1
P03F9
B Camshaft Position Actuator Position Sensor C Circuit High Bank 1
P03FA
Ignition K Control Signal Circuit/Open
P03FB
Ignition K Control Signal Circuit Low
P03FC
Ignition K Control Signal Circuit High
P03FD
Ignition L Control Signal Circuit/Open
P03FE
Ignition L Control Signal Circuit Low
P03FF
Ignition L Control Signal Circuit High
P0400
EGR A Flow
P0401
EGR A Flow Insufficient Detected
P0402
EGR A Flow Excessive Detected
P0403
EGR A Control Circuit/Open
P0404
EGR A Control Circuit Range/Performance
P0405
EGR Sensor A Circuit Low
P0406
EGR Sensor A Circuit High
P0407
EGR Sensor B Circuit Low
P0408
EGR Sensor B Circuit High
P0409
EGR Sensor A Circuit
P040A
EGR Temperature Sensor A Circuit
P040B
EGR Temperature Sensor A Circuit Range/Performance
P040C
EGR Temperature Sensor A Circuit Low
P040D
EGR Temperature Sensor A Circuit High
P040E
EGR Temperature Sensor A Circuit Intermittent/Erratic
P040F
EGR Temperature Sensor A/B Correlation
P0410
AIR System A
P0411
AIR System A Incorrect Flow Detected
P0412
AIR System Switching Valve A Circuit
P0413
AIR System Switching Valve A Circuit Open
P0414
AIR System Switching Valve A Circuit Shorted
P0415
AIR System Switching Valve B Circuit
P0416
AIR System Switching Valve B Circuit Open
P0417
AIR System Switching Valve B Circuit Shorted
P0418
AIR System Control A Circuit
P0419
AIR System Control B Circuit
P041A
EGR Temperature Sensor B Circuit
P041B
EGR Temperature Sensor B Circuit Range/Performance
P041C
EGR Temperature Sensor B Circuit Low
P041D
EGR Temperature Sensor B Circuit High
P041E
EGR Temperature Sensor B Circuit Intermittent/Erratic
P041F
AIR System Switching Valve A Circuit Low
P0420
Catalyst System Efficiency Below Threshold Bank 1
P0421
Catalyst 1 Efficiency Below Threshold Bank 1
P0422
Catalyst 2 Efficiency Below Threshold Bank 1
P0423
Heated Catalyst Efficiency Below Threshold Bank 1
P0424
Heated Catalyst Temperature Below Threshold Bank 1
P0425
Catalyst Temperature Sensor Circuit Bank 1 Sensor 1
P0426
Catalyst Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1
P0427
Catalyst Temperature Sensor Circuit Low Bank 1 Sensor 1
P0428
Catalyst Temperature Sensor Circuit High Bank 1 Sensor 1
P0429
Catalyst Heater Control Circuit/Open Bank 1
P042A
Catalyst Temperature Sensor Circuit Bank 1 Sensor 2
P042B
Catalyst Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2
P042C
Catalyst Temperature Sensor Circuit Low Bank 1 Sensor 2
P042D
Catalyst Temperature Sensor Circuit High Bank 1 Sensor 2
P042E
EGR A Control Stuck Open
P042F
EGR A Control Stuck Closed
P0430
Catalyst System Efficiency Below Threshold Bank 2
P0431
Catalyst 1 Efficiency Below Threshold Bank 2
P0432
Catalyst 2 Efficiency Below Threshold Bank 2
P0433
Heated Catalyst Efficiency Below Threshold Bank 2
P0434
Heated Catalyst Temperature Below Threshold Bank 2
P0435
Catalyst Temperature Sensor Circuit Bank 2 Sensor 1
P0436
Catalyst Temperature Sensor Circuit Range/Performance Bank 2 Sensor 1
P0437
Catalyst Temperature Sensor Circuit Low Bank 2 Sensor 1
P0438
Catalyst Temperature Sensor Circuit High Bank 2 Sensor 1
P0439
Catalyst Heater Control Circuit/Open Bank 2
P043A
Catalyst Temperature Sensor Circuit Bank 2 Sensor 2
P043B
Catalyst Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2
P043C
Catalyst Temperature Sensor Circuit Low Bank 2 Sensor 2
P043D
Catalyst Temperature Sensor Circuit High Bank 2 Sensor 2
P043E
EVAP System Leak Detection Reference Orifice Low Flow
P043F
EVAP System Leak Detection Reference Orifice High Flow
P0440
EVAP System
P0441
EVAP System Incorrect Purge Flow
P0442
EVAP System Leak Detected (small leak)
P0443
EVAP System Purge Control Valve A Circuit
P0444
EVAP System Purge Control Valve A Circuit Open
P0445
EVAP System Purge Control Valve A Circuit Shorted
P0446
EVAP System Vent Control Circuit
P0447
EVAP System Vent Control Circuit Open
P0448
EVAP System Vent Control Circuit Shorted
P0449
EVAP System Vent Valve Control Circuit/Open
P044A
EGR Sensor C Circuit
P044B
EGR Sensor C Circuit Range/Performance
P044C
EGR Sensor C Circuit Low
P044D
EGR Sensor C Circuit High
P044E
EGR Sensor C Circuit Intermittent/Erratic
P044F
AIR System Switching Valve A Circuit High