Diagnostic library

Find an OBD2 code

Search the code from your scanner, then narrow the library by system, severity, or code family.

9,253 diagnostic guides

Sort

Find codes by symptomChoose what you notice to search matching code guides.

Rough idle or shakingVibration while stopped Hard to startLong cranking or no-start Engine stallsCuts out at idle or on the road Hesitates or loses powerSlow response when accelerating Battery light is onCharging system warning Harsh gear changesDelayed or rough shifting

A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.

Low priority P · Powertrain Clear all

Quick browse

Choose a vehicle system

Engine1049 Emissions515 Fuel1016 Sensors & Electronics2110 Transmission866 Electrical & Charging1797 Body & Restraints193 Chassis & Brakes479 Network & Communication1228

FiltersSeverity · family

Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

Vehicle coverage

These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 121–144 of 298

Most searched first

P0586Cruise Control Vent Control Circuit/OpenLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0586 relates to cruise control vent control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0587Cruise Control Vent Control Circuit LowLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0587 relates to cruise control vent control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0588Cruise Control Vent Control Circuit HighLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0588 relates to cruise control vent control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0589Cruise Control Multi-Function Input B CircuitLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0589 relates to cruise control multi-function input b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0590Cruise Control Multi-Function Input B Circuit StuckLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0590 relates to cruise control multi-function input b circuit stuck. Check the fault conditions and vehicle-specific procedure before replacing parts.P0591Cruise Control Multi-Function Input B Circuit Range/PerformanceLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0591 relates to cruise control multi-function input b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0592Cruise Control Multi-Function Input B Circuit LowLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0592 relates to cruise control multi-function input b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0593Cruise Control Multi-Function Input B Circuit HighLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0593 relates to cruise control multi-function input b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0594Cruise Control Servo Control Circuit/OpenLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0594 relates to cruise control servo control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0595Cruise Control Servo Control Circuit LowLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0595 relates to cruise control servo control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0596Cruise Control Servo Control Circuit HighLow prioritySensors & Electronics30–120 minutes for initial diagnosisP0596 relates to cruise control servo control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P05E1A/C Refrigerant Pressure Sensor A Circuit Intermittent/ErraticLow prioritySensors & Electronics30–120 minutes for initial diagnosisP05E1 relates to a/c refrigerant pressure sensor a circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P05E2A/C Refrigerant Pressure Sensor B Circuit Intermittent/ErraticLow prioritySensors & Electronics30–120 minutes for initial diagnosisP05E2 relates to a/c refrigerant pressure sensor b circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P0624Fuel Cap Lamp Control CircuitLow priorityFuel System30–120 minutes for initial diagnosisP0624 relates to fuel cap lamp control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0645A/C Clutch Relay Control CircuitLow priorityTransmission Issues30–120 minutes for initial diagnosisP0645 relates to a/c clutch relay control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0646A/C Clutch Relay Control Circuit LowLow priorityTransmission Issues30–120 minutes for initial diagnosisP0646 relates to a/c clutch relay control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0647A/C Clutch Relay Control Circuit HighLow priorityTransmission Issues30–120 minutes for initial diagnosisP0647 relates to a/c clutch relay control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P06A0Variable A/C Compressor Control CircuitLow prioritySensors & Electronics30–120 minutes for initial diagnosisP06A0 relates to variable a/c compressor control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P06A1Variable A/C Compressor Control Circuit LowLow prioritySensors & Electronics30–120 minutes for initial diagnosisP06A1 relates to variable a/c compressor control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P06A2Variable A/C Compressor Control Circuit HighLow prioritySensors & Electronics30–120 minutes for initial diagnosisP06A2 relates to variable a/c compressor control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0D74A/C Compressor Control Module InternalTemperature Sensor A Circuit Intermittent/ErraticLow priorityElectrical & Charging System45–120 minutes for initial diagnosisP0D74 concerns a/c compressor control module internaltemperature sensor a circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0D75A/C Compressor Control Module Output Driver Temperature Sensor CircuitLow priorityElectrical & Charging System45–120 minutes for initial diagnosisP0D75 concerns a/c compressor control module output driver temperature sensor circuit. Learn what this fault indicates and where to begin diagnosis.P0D76A/C Compressor Control Module Output Driver Temperature Sensor PerformanceLow priorityElectrical & Charging System45–120 minutes for initial diagnosisP0D76 concerns a/c compressor control module output driver temperature sensor performance. Learn what this fault indicates and where to begin diagnosis.P0D77A/C Compressor Control Module Output Driver Temperature Sensor Circuit HighLow priorityElectrical & Charging System45–120 minutes for initial diagnosisP0D77 concerns a/c compressor control module output driver temperature sensor circuit high. Learn what this fault indicates and where to begin diagnosis.