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.

C · Chassis 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 193–216 of 479

Most searched first

C055DBrake Hydraulic Circuit B LeakUrgentChassis & Brakes45–120 minutes for initial diagnosisC055D concerns brake hydraulic circuit b leak. Learn what this fault indicates and where to begin diagnosis.C055EBrake Hydraulic Circuit A LeakUrgentChassis & Brakes45–120 minutes for initial diagnosisC055E concerns brake hydraulic circuit a leak. Learn what this fault indicates and where to begin diagnosis.C055FBSCM/EBBC Hydraulic Unit PerformanceCheck soonChassis & Brakes45–120 minutes for initial diagnosisC055F concerns bscm/ebbc hydraulic unit performance. Learn what this fault indicates and where to begin diagnosis.C0560Brake Pressure Sensor A Missing CalibrationUrgentChassis & Brakes45–120 minutes for initial diagnosisC0560 concerns brake pressure sensor a missing calibration. Learn what this fault indicates and where to begin diagnosis.C0561Vacuum Sensor A/B CorrelationCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0561 concerns vacuum sensor a/b correlation. Learn what this fault indicates and where to begin diagnosis.C0562Brake Pedal Position Sensor Supply Voltage Circuit/OpenUrgentChassis & Brakes45–120 minutes for initial diagnosisC0562 concerns brake pedal position sensor supply voltage circuit/open. Learn what this fault indicates and where to begin diagnosis.C0563ABS Control Module PerformanceCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0563 concerns abs control module performance. Learn what this fault indicates and where to begin diagnosis.C0564ABS Control Module System Voltage LowCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0564 concerns abs control module system voltage low. Learn what this fault indicates and where to begin diagnosis.C0565ABS Control Module System Voltage HighCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0565 concerns abs control module system voltage high. Learn what this fault indicates and where to begin diagnosis.C0566Brake Booster Solenoid Circuit/OpenUrgentChassis & Brakes45–120 minutes for initial diagnosisC0566 concerns brake booster solenoid circuit/open. Learn what this fault indicates and where to begin diagnosis.C0567Brake Booster Solenoid Circuit LowUrgentChassis & Brakes45–120 minutes for initial diagnosisC0567 concerns brake booster solenoid circuit low. Learn what this fault indicates and where to begin diagnosis.C0568Brake Booster Solenoid Circuit HighUrgentChassis & Brakes45–120 minutes for initial diagnosisC0568 concerns brake booster solenoid circuit high. Learn what this fault indicates and where to begin diagnosis.C0569Brake Booster Solenoid Circuit PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC0569 concerns brake booster solenoid circuit performance. Learn what this fault indicates and where to begin diagnosis.C056ABrake Booster Pressure Sensor Power Supply CircuitUrgentChassis & Brakes45–120 minutes for initial diagnosisC056A concerns brake booster pressure sensor power supply circuit. Learn what this fault indicates and where to begin diagnosis.C056BBrake Pressure Sensor A Intermittent/ErraticUrgentChassis & Brakes45–120 minutes for initial diagnosisC056B concerns brake pressure sensor a intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.C056CBrake Pressure Sensor B Intermittent/ErraticUrgentChassis & Brakes45–120 minutes for initial diagnosisC056C concerns brake pressure sensor b intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.C056DBrake Pedal Position Sensor Supply Voltage Circuit LowUrgentChassis & Brakes45–120 minutes for initial diagnosisC056D concerns brake pedal position sensor supply voltage circuit low. Learn what this fault indicates and where to begin diagnosis.C056EBrake Pedal Position Sensor Supply Voltage Circuit HighUrgentChassis & Brakes45–120 minutes for initial diagnosisC056E concerns brake pedal position sensor supply voltage circuit high. Learn what this fault indicates and where to begin diagnosis.C056FBrake Booster Travel Sensor Circuit LowUrgentChassis & Brakes45–120 minutes for initial diagnosisC056F concerns brake booster travel sensor circuit low. Learn what this fault indicates and where to begin diagnosis.C0570Brake Booster Travel Sensor Circuit HighUrgentChassis & Brakes45–120 minutes for initial diagnosisC0570 concerns brake booster travel sensor circuit high. Learn what this fault indicates and where to begin diagnosis.C0571Brake Pressure Sensor C Circuit LowUrgentChassis & Brakes45–120 minutes for initial diagnosisC0571 concerns brake pressure sensor c circuit low. Learn what this fault indicates and where to begin diagnosis.C0572Brake Pressure Sensor C Circuit HighUrgentChassis & Brakes45–120 minutes for initial diagnosisC0572 concerns brake pressure sensor c circuit high. Learn what this fault indicates and where to begin diagnosis.C0573Brake Pressure Sensor C Circuit/OpenUrgentChassis & Brakes45–120 minutes for initial diagnosisC0573 concerns brake pressure sensor c circuit/open. Learn what this fault indicates and where to begin diagnosis.C0574Brake Pressure Sensor C Circuit Range/PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC0574 concerns brake pressure sensor c circuit range/performance. Learn what this fault indicates and where to begin diagnosis.