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
Find codes by symptomChoose what you notice to search matching code guides.
Rough idle or shakingVibration while stoppedHard to startLong cranking or no-startEngine stallsCuts out at idle or on the roadHesitates or loses powerSlow response when acceleratingBattery light is onCharging system warningHarsh gear changesDelayed or rough shifting
A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.
Quick browse
Choose a vehicle system
FiltersSeverity · family
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 1681–1704 of 1797
P2D8CFan 2 Control Module Supply Voltage CircuitCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D92Starter/Generator Phase X Current Sensor Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D93Starter/Generator Phase Y Current Sensor Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D94Starter/Generator Phase Z Current Sensor Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D95Starter/Generator Phase X Current Sensor Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D96Starter/Generator Phase Y Current Sensor Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D97Starter/Generator Phase Z Current Sensor Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D98Starter/Generator Phase X Current Circuit Intermittent/ErraticCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D99Starter/Generator Phase Y Current Circuit Intermittent/ErraticCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D9AStarter/Generator Phase Z Current Circuit Intermittent/ErraticCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D9BStarter/Generator Phase U Current Circuit Intermittent/ErraticCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D9CStarter/Generator Phase V Current Circuit Intermittent/ErraticCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D9DStarter/Generator Phase W Current Circuit Intermittent/ErraticCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D9EHigh Voltage System Voltage LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D9FHigh Voltage System Voltage HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2DA0High Voltage System PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2DA5Coolant Heater A Supply Voltage CircuitCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2DA7Coolant Heater A Control Module System VoltageCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2DB6Battery Charger B Cooling System PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2DB7Battery Charging System B High Voltage Interlock Circuit/OpenCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2DB8Battery Charging System B High Voltage Interlock Circuit PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2DB9Battery Charging System B High Voltage Interlock Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2DBABattery Charging System B High Voltage Interlock Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2DBBBattery Charging System B High Voltage Interlock Circuit Intermittent/ErraticCheck soonElectrical & Charging System30–120 minutes for initial diagnosis