🏠 Cars

OBD-II Fault Code Decoder

Enter a code like P0420, P0300, P0171

Popular Codes

B0020 — Driver Frontal Deployment Loop
Severity: Critical
B1000 — ECU Malfunction
Severity: Critical
C0035 — Left Front Wheel Speed Sensor
Severity: High
C0040 — Right Front Wheel Speed Sensor
Severity: High
C0050 — Right Rear Wheel Speed Sensor
Severity: High
P0011 — Camshaft Position Timing Over Advanced Bank 1
Severity: High
P0014 — Exhaust Camshaft Position Timing Over Advanced
Severity: High
P0101 — Mass Air Flow Sensor Range Performance
Severity: Medium
P0113 — Intake Air Temperature Sensor High Input
Severity: Low
P0128 — Coolant Thermostat Below Regulating Temperature
Severity: Medium
P0135 — O2 Sensor Heater Circuit Malfunction
Severity: Medium
P0141 — O2 Sensor Heater Circuit Bank 1 Sensor 2
Severity: Medium
P0155 — O2 Sensor Heater Circuit Bank 2 Sensor 1
Severity: Medium
P0171 — System Too Lean Bank 1
Severity: Medium
P0172 — System Too Rich Bank 1
Severity: Medium
P0174 — System Too Lean Bank 2
Severity: Medium
P0175 — System Too Rich Bank 2
Severity: Medium
P0191 — Fuel Rail Pressure Sensor Range
Severity: Medium
P0201 — Injector Circuit Cylinder 1
Severity: Medium
P0202 — Injector Circuit Cylinder 2
Severity: Medium
P0203 — Injector Circuit Cylinder 3
Severity: Medium
P0204 — Injector Circuit Cylinder 4
Severity: Medium
P0234 — Turbo Overboost Condition
Severity: High
P0299 — Turbo Underboost Condition
Severity: High
P0300 — Random/Multiple Cylinder Misfire Detected
Severity: High
P0301 — Cylinder 1 Misfire Detected
Severity: High
P0302 — Cylinder 2 Misfire Detected
Severity: High
P0303 — Cylinder 3 Misfire Detected
Severity: High
P0304 — Cylinder 4 Misfire Detected
Severity: High
P0305 — Cylinder 5 Misfire
Severity: High
P0306 — Cylinder 6 Misfire
Severity: High
P0325 — Knock Sensor Malfunction
Severity: Medium
P0335 — Crankshaft Position Sensor A Circuit
Severity: High
P0340 — Camshaft Position Sensor Circuit
Severity: High
P0351 — Ignition Coil A Primary Secondary Circuit
Severity: High
P0352 — Ignition Coil B Primary Secondary Circuit
Severity: High
P0353 — Ignition Coil C Primary Secondary Circuit
Severity: High
P0354 — Ignition Coil D Primary Secondary Circuit
Severity: High
P0401 — EGR Flow Insufficient Detected
Severity: Medium
P0402 — EGR Excessive Flow Detected
Severity: Medium
P0410 — Secondary Air Injection Malfunction
Severity: Low
P0411 — Secondary Air Incorrect Flow
Severity: Low
P0420 — Catalyst System Efficiency Below Threshold
Severity: Medium
P0421 — Warm Up Catalyst Efficiency Below Threshold
Severity: Medium
P0430 — Catalyst System Efficiency Below Threshold Bank 2
Severity: Medium
P0431 — Warm Up Catalyst Efficiency Bank 2
Severity: Medium
P0440 — EVAP System Malfunction
Severity: Low
P0441 — EVAP Incorrect Purge Flow
Severity: Low
P0442 — Evaporative Emission System Leak Detected Small Leak
Severity: Low
P0443 — EVAP Purge Control Valve Circuit
Severity: Low
P0446 — EVAP Vent Control Circuit
Severity: Low
P0455 — Evaporative Emission System Leak Detected Large Leak
Severity: Low
P0456 — EVAP Very Small Leak
Severity: Low
P0457 — Loose Fuel Cap Detected
Severity: Low
P0463 — Fuel Level Sensor High Input
Severity: Low
P0496 — EVAP High Purge Flow
Severity: Low
P0500 — Vehicle Speed Sensor Malfunction
Severity: Medium
P0505 — Idle Air Control Malfunction
Severity: Medium
P0507 — Idle Control System RPM Higher Than Expected
Severity: Medium
P0520 — Engine Oil Pressure Sensor Circuit
Severity: High
P0562 — System Voltage Low
Severity: High
P0606 — PCM Processor Fault
Severity: Critical
P0700 — Transmission Control System Malfunction
Severity: High
P0705 — Transmission Range Sensor Circuit
Severity: High
P0715 — Input Turbine Speed Sensor Circuit
Severity: High
P0720 — Output Speed Sensor Circuit
Severity: High
P0730 — Incorrect Gear Ratio
Severity: High
P0741 — Torque Converter Clutch Circuit Performance
Severity: High
P0750 — Shift Solenoid A Malfunction
Severity: High
P0755 — Shift Solenoid B Malfunction
Severity: High
P0760 — Shift Solenoid C Malfunction
Severity: High
P0776 — Pressure Control Solenoid Performance
Severity: High
P0780 — Shift Malfunction
Severity: High
P0841 — Transmission Fluid Pressure Sensor
Severity: High
P1101 — Mass Air Flow Sensor Out of Self Test Range
Severity: Medium
P1128 — Closed Loop Fueling Not Achieved
Severity: Medium
P1151 — Lack of HO2S Switch Sensor Indicates Lean
Severity: Medium
P1174 — Fuel Trim Cylinder Balance Bank 1
Severity: Medium
P1299 — Cylinder Head Overtemperature Protection
Severity: Critical
P1450 — Unable to Bleed Up Fuel Tank Vacuum
Severity: Medium
P1516 — Throttle Actuator Control Module
Severity: High
P1518 — Intake Manifold Runner Control Fault
Severity: Medium
P1682 — Ignition Switch Circuit 2
Severity: Medium
P2096 — Post Catalyst Fuel Trim Too Lean
Severity: Medium
P2098 — Post Catalyst Fuel Trim Too Lean Bank 2
Severity: Medium
P2101 — Throttle Actuator Motor Range
Severity: High
P2135 — Throttle Position Sensor Correlation
Severity: High
P2195 — O2 Sensor Signal Stuck Lean Bank 1 Sensor 1
Severity: Medium
P2196 — O2 Sensor Stuck Rich Bank 1 Sensor 1
Severity: Medium
P2270 — O2 Sensor Signal Stuck Lean Bank 1 Sensor 2
Severity: Medium
P2272 — O2 Sensor Signal Stuck Lean Bank 2 Sensor 2
Severity: Medium
P2610 — ECM PCM Engine Off Timer Performance
Severity: Medium
P2646 — Rocker Arm Oil Pressure Switch Circuit
Severity: High
P2714 — Pressure Control Solenoid D Performance
Severity: High
P2733 — Pressure Control Solenoid F
Severity: High
P3400 — Cylinder Deactivation System Bank 1
Severity: High
P3497 — Cylinder Deactivation System Bank 2
Severity: High
U0100 — Lost Communication With ECM PCM
Severity: Critical
U0121 — Lost Communication With ABS Module
Severity: High
U0140 — Lost Communication With Body Control Module
Severity: High