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 649–672 of 2110
P072FStuck in Gear 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP0732Gear 2 Incorrect RatioCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0733Gear 3 Incorrect RatioCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0734Gear 4 Incorrect RatioCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0735Gear 5 Incorrect RatioCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0736Reverse Incorrect RatioCheck soonSensors & Electronics30–120 minutes for initial diagnosisP073AStuck in Gear 5Check soonSensors & Electronics30–120 minutes for initial diagnosisP073BStuck in Gear 6Check soonSensors & Electronics30–120 minutes for initial diagnosisP073CStuck in Gear 7Check soonSensors & Electronics30–120 minutes for initial diagnosisP073DUnable to Engage NeutralCheck soonSensors & Electronics30–120 minutes for initial diagnosisP073EUnable to Engage ReverseCheck soonSensors & Electronics30–120 minutes for initial diagnosisP073FUnable to Engage Gear 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP074AUnable To Engage Gear 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP074BUnable To Engage Gear 3Check soonSensors & Electronics30–120 minutes for initial diagnosisP074CUnable To Engage Gear 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP074DUnable To Engage Gear 5Check soonSensors & Electronics30–120 minutes for initial diagnosisP074EUnable To Engage Gear 6Check soonSensors & Electronics30–120 minutes for initial diagnosisP074FUnable To Engage Gear 7Check soonSensors & Electronics30–120 minutes for initial diagnosisP076FGear 7 Incorrect RatioCheck soonSensors & Electronics30–120 minutes for initial diagnosisP077AOutput Shaft Speed Sensor Circuit - Loss of Direction SignalCheck soonSensors & Electronics30–120 minutes for initial diagnosisP077BOutput Shaft Speed Sensor Circuit - Direction ErrorCheck soonSensors & Electronics30–120 minutes for initial diagnosisP077COutput Shaft Speed Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP077DOutput Shaft Speed Sensor Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP077FReverse 2 Incorrect RatioCheck soonSensors & Electronics30–120 minutes for initial diagnosis