LEGACY / P · B · C · U

Legacy code directory

Preserved from the earlier site: 3,471 records. Labels remain in English and may vary by manufacturer or repeat an identifier. These are not newly verified repair instructions.

Verify manufacturer, model and year. Do not replace a component based only on a generic label.

3,471 · 25 / 35

P0421Warm Up Catalyst Efficiency Below Threshold (Bank 1)
P0422Main Catalyst Efficiency Below Threshold (Bank 1)
P0423Heated Catalyst Efficiency Below Threshold (Bank l)
P0424Heated Catalyst Temperature Below Threshold (Bank 1)
P0430Catalyst System Efficiency Below Threshold (Bank 2)
P0431Warm Up Catalyst Efficiency Below Threshold (Bank 2)
P0432Main Catalyst Efficiency Below Threshold (Bank 2)
P0433Heated Catalyst Efficiency Below Threshold (Bank 2)
P0434Heated Catalyst Temperature Below Threshold (Bank 2)
P0440Evaporative Emission Control System Malfunction
P0441Evaporative Emission Control System Incorrect Purge flow
P0442Evaporative Emission Control System leak Detected (small leak)
P0443Evaporative Emission Control System Purge Control Valve circuit Malfunction
P0444Evaporative Emission Control System Purge Control Valve Circuit Open
P0445Evaporative Emission Control System Purge Control Valve Circuit Shorted
P0446Evaporative Emission Control System Vent Control Circuit Malfunction
P0447Evaporative Emission Control System Vent Control Circuit Open
P0448Evaporative Emission Control System Vent Control Circuit Shorted
P0449Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
P0450Evaporative Emission Control System Pressure Sensor Malfunction
P0451Evaporative Emission Control System Pressure Sensor Range/Performance
P0452Evaporative Emission Control System Pressure Sensor Low Input
P0453Evaporative Emission Control System Pressure Sensor High Input
P0454Evaporative Emission Control System Pressure Sensor Intermittent
P0455Evaporative Emission Control System Tank Detected (gross leak)
P0456Evaporative Emissions System - Small Leak Detected
P0457Evaporative Emission System Leak Detected (Fuel Cap Loose/Off)
P0460Fuel Level Sensor Circuit Malfunction
P0461Fuel Level Sensor Circuit Range/Performance
P0462Fuel level Sensor Circuit Low Input
P0463Fuel level Sensor Circuit High Input
P0464Fuel level Sensor Circuit Intermittent
P0465Purge Flow Sensor Circuit Malfunction
P0466Purge flow Sensor Circuit Range/Performance
P0467Purge Flow Sensor Circuit Low Input
P0468Purge flow Sensor Circuit High Input
P0469Purge flow Sensor Circuit Intermittent
P0470Exhaust Pressure Sensor Malfunction
P0471Exhaust Pressure Sensor Range/Performance
P0472Exhaust Pressure Sensor Low
P0473Exhaust Pressure Sensor High
P0474Exhaust Pressure Sensor Intermittent
P0475Exhaust Pressure Control Valve Malfunction
P0476Exhaust Pressure Control Valve Range/Performance
P0477Exhaust Pressure Control Valve Low
P0478Exhaust Pressure Control Valve High
P0479Exhaust Pressure Control Valve Intermittent
P0480Cooling Fan 1 Control Circuit Malfunction
P0481Cooling Fan 2 Control Circuit Malfunction
P0482Cooling Fan 3 Control Circuit Malfunction
P0483Cooling Fan Rationality Check Malfunction
P0484Cooling Fan Circuit Over Current
P0485Cooling Fan Power/Ground Circuit Malfunction
P0500Vehicle Speed Sensor Malfunction
P0501Vehicle Speed Sensor Range/Performance
P0502Vehicle Speed Sensor Circuit Low Input
P0503Vehicle Speed Sensor Intermittent/Erratic/High
P0505Idle Control System Malfunction
P0506Idle Control System RPM lower Than Expected
P0507Idle Control System RPM higher Than Expected
P0510Closed Throttle Position Switch Malfunction
P0520Engine Oil Pressure Sensor/Switch Circuit Malfunction
P0521Engine Oil Pressure Sensor/Switch Range/Performance
P0522Engine Oil Pressure Sensor/Switch Low Voltage
P0523Engine Oil Pressure Sensor/Switch High Voltage
P0530A/C Refrigerant Pressure Sensor Circuit Malfunction
P0531A/C Refrigerant Pressure Sensor Circuit Range/Performance
P0532A/C Refrigerant Pressure Sensor Circuit Low Input
P0533A/C Refrigerant pressure Sensor Circuit High Input
P0534Air Conditioner Refrigerant Charge Loss
P0550Power Steering Pressure Sensor Circuit Malfunction
P0551Power Steering Pressure Sensor Circuit Range/Performance
P0552Power Steering Pressure Sensor Circuit Low Input
P0553Power Steering Pressure Sensor Circuit High Input
P0554Power Steering Pressure sensor Circuit Intermittent
P0560System Voltage Malfunction
P0561System Voltage Unstable
P0562System Voltage Low
P0563System Voltage High
P0565Cruise Control On Signal Malfunction
P0566Cruise Control Off Signal Malfunction
P0567Cruise Control Resume Signal Malfunction
P0568Cruise Control Set Signal Malfunction
P0569Cruise Control Coast Signal Malfunction
P0570Cruise Control Accel Signal Malfunction
P0571Cruise Control/Brake Switch A Circuit Malfunction
P0572Cruise Control/Brake Switch A Circuit Low
P0573Cruise Control/Brake Switch A Circuit High
P0574through P0580 Reserved for Cruise Codes
P0600Serial Communication Link Malfunction
P0601Internal Control Module Memory Check Sum Error
P0602Control Module Programming Error
P0603Internal Control Module Keep Alive Memory (KAM) Error
P0604Internal Control Module RAM Error
P0605Internal Control Module ROM Error (Module Identification Defined by SAE J1979)
P0606PCM Processor Fault
P0608Control Module VSS Output “A” Malfunction
P0609Control Module VSS Output “B” Malfunction
P0620Generator Control Circuit Malfunction
P0621Generator Lamp “L” Control Circuit Malfunction