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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
P04B4
Refueling Vapor Control Valve Stuck Closed
P04B5
Fuel Fill Door Stuck Open
P04B6
Fuel Fill Door Stuck Closed
P04B7
Fuel Fill Door Position Sensor/Switch Circuit Intermittent/Erratic
P04B8
Fuel Fill Door Position Sensor/Switch Circuit
P04B9
Fuel Fill Door Position Sensor/Switch Circuit Low
P04BA
Fuel Fill Door Position Sensor/Switch Circuit High
P04BB
Fuel Fill Door Lock Control Circuit/Open
P04BC
Fuel Fill Door Lock Control Range/Performance
P04BD
Fuel Fill Door Lock Control Circuit Low
P04BE
Fuel Fill Door Lock Control Circuit High
P04BF
Fuel Fill Door Unlock Control Circuit/Open
P04C0
Fuel Fill Door Unlock Control Range/Performance
P04C1
Fuel Fill Door Unlock Control Circuit Low
P04C2
Fuel Fill Door Unlock Control Circuit High
P04C3
Fuel Fill Door Lock Position Sensor/Switch Circuit
P04C4
Fuel Fill Door Lock Position Sensor/Switch Circuit Range/Performance
P04C5
Fuel Fill Door Lock Position Sensor/Switch Circuit Low
P04C6
Fuel Fill Door Lock Position Sensor/Switch Circuit High
P04C7
Fuel Fill Door Lock Position Sensor/Switch Circuit Intermittent/Erratic
P04C8
Fuel Fill Door Open Request Sensor/Switch Circuit
P04C9
Fuel Fill Door Open Request Sensor/Switch Performance/Stuck Off
P04CA
Fuel Fill Door Open Request Sensor/Switch Circuit Low
P04CB
Fuel Fill Door Open Request Sensor/Switch Circuit High
P04CC
Fuel Fill Door Open Request Sensor/Switch Circuit Intermittent/Erratic
P04CD
Fuel Fill Door Open Request Sensor/Switch Stuck On
P04CE
EGR Temperature Sensor C Circuit
P04CF
EGR Temperature Sensor C Circuit Range/Performance
P04D0
EGR Temperature Sensor C Circuit Low
P04D1
EGR Temperature Sensor C Circuit High
P04D2
EGR Temperature Sensor C Circuit Intermittent/Erratic
P04D3
Exhaust Brake Input Circuit
P04D4
Exhaust Brake Input Circuit Range/Performance
P04D5
Exhaust Brake Input Circuit Low
P04D6
Exhaust Brake Input Circuit High
P04D7
Exhaust Brake Input Circuit Intermittent/Erratic
P04D8
Excessive Time To Enter Closed Loop EGR Control
P04D9
Closed Loop EGR Control At Limit - Flow Too Low
P04DA
Closed Loop EGR Control At Limit - Flow Too High
P04DB
Crankcase Ventilation System Disconnected
P04DC
Fuel Fill Door Position Sensor/Switch Circuit Range/Performance
P04DD
Cold Start EGR A Flow Insufficient Detected
P04DE
Cold Start EGR A Flow Excessive Detected
P04DF
EVAP System Purge Control Valve A Performance/Stuck Open
P04E0
EVAP System Purge Control Valve A Stuck Closed
P04E1
Crankcase Ventilation Hose Connection Sensor Circuit
P04E2
Crankcase Ventilation Hose Connection Sensor Circuit Low
P04E3
Crankcase Ventilation Hose Connection Sensor Circuit High
P04E4
Crankcase Ventilation Hose Connection Sensor Circuit Intermittent/Erratic
P04E5
EGR Temperature Sensor D Circuit
P04E6
EGR Temperature Sensor D Circuit Range/Performance
P04E7
EGR Temperature Sensor D Circuit Low
P04E8
EGR Temperature Sensor D Circuit High
P04E9
EGR Temperature Sensor D Circuit Intermittent/Erratic
P04EA
EVAP System Small Leak Detected - Fuel Tank Side
P04EB
EVAP System Small Leak Detected - Fresh Air Side
P04EC
EVAP System Large Leak Detected - Fuel Tank Side
P04ED
EVAP System Large Leak Detected - Fresh Air Side
P04EE
EVAP System Very Small Leak Detected - Fuel Tank Side
P04EF
EVAP System Very Small Leak Detected - Fresh Air Side
P04F0
EVAP System High Load Purge Line A Performance
P04F1
EVAP System Purge Line Performance
P04F2
Catalyst Heater Supply Voltage Bank 1
P04F3
Catalyst Heater Supply Voltage Bank 2
P04F4
Catalyst Heater Circuit Low Bank 1
P04F5
Catalyst Heater Circuit Low Bank 2
P04F6
Catalyst Heater Circuit High Bank 1
P04F7
Catalyst Heater Circuit High Bank 2
P04F8
Catalyst Heater Circuit Intermittent Bank 1
P04F9
Catalyst Heater Circuit Intermittent Bank 2
P04FA
EGR A Control Temperature Too High
P04FB
Crankcase Ventilation Hose Connection Sensor Range/Performance
P04FC
Crankcase Ventilation System Performance
P04FD
EGR Actuator A Control Processor Performance
P04FE
Catalyst Heater Circuit Performance Bank 1
P04FF
Catalyst Heater Circuit Performance Bank 2
P0500
Vehicle Speed Sensor A Circuit
P0501
Vehicle Speed Sensor A Circuit Range/Performance
P0502
Vehicle Speed Sensor A Circuit Low
P0503
Vehicle Speed Sensor A Circuit Intermittent/Erratic/High
P0504
Brake Switch A/B Correlation
P0505
Idle Control System
P0506
Idle Control System RPM - Lower Than Expected
P0507
Idle Control System RPM - Higher Than Expected
P0508
Idle Air Control System Circuit Low
P0509
Idle Air Control System Circuit High
P050A
Cold Start Idle Control System Performance
P050B
Cold Start Ignition Timing Performance
P050C
Cold Start Engine Coolant Temperature Performance
P050D
Cold Start Rough Idle
P050E
Cold Start Engine Exhaust Temperature Too Low
P050F
Brake Assist Vacuum Too Low
P0510
Closed Throttle Position Switch
P0511
Idle Air Control Circuit
P0512
Starter Request Circuit
P0513
Incorrect Immobilizer Key
P0514
Battery Temperature Sensor Circuit Range/Performance
P0515
Battery Temperature Sensor Circuit
P0516
Battery Temperature Sensor Circuit Low
P0517
Battery Temperature Sensor Circuit High