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.

Transmission Issues Check soon 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 49–72 of 833

Most searched first

P0770Shift Solenoid E MalfunctionCheck soonTransmission Issues45–120 minutes for initial diagnosisP0770 means Shift Solenoid E Malfunction. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0775Pressure Control Solenoid BCheck soonTransmission Issues30–120 minutes for initial diagnosisP0775 relates to pressure control solenoid b. Check the fault conditions and vehicle-specific procedure before replacing parts.P0776Pressure Control Solenoid B Performance/Stuck OffCheck soonTransmission Issues30–120 minutes for initial diagnosisP0776 relates to pressure control solenoid b performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P0777Pressure Control Solenoid B Stuck OnCheck soonTransmission Issues30–120 minutes for initial diagnosisP0777 relates to pressure control solenoid b stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P0778Pressure Control Solenoid B ElectricalCheck soonTransmission Issues30–120 minutes for initial diagnosisP0778 relates to pressure control solenoid b electrical. Check the fault conditions and vehicle-specific procedure before replacing parts.P0779Pressure Control Solenoid B IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP0779 relates to pressure control solenoid b intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P077ETransmission Fluid Temperature Measurement System - Multiple Sensor CorrelationCheck soonTransmission Issues30–120 minutes for initial diagnosisP077E relates to transmission fluid temperature measurement system - multiple sensor correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P0780Shift ErrorCheck soonTransmission Issues30–120 minutes for initial diagnosisP0780 relates to shift error. Check the fault conditions and vehicle-specific procedure before replacing parts.P07811-2 ShiftCheck soonTransmission Issues30–120 minutes for initial diagnosisP0781 relates to 1-2 shift. Check the fault conditions and vehicle-specific procedure before replacing parts.P07822-3 ShiftCheck soonTransmission Issues30–120 minutes for initial diagnosisP0782 relates to 2-3 shift. Check the fault conditions and vehicle-specific procedure before replacing parts.P07833-4 ShiftCheck soonTransmission Issues30–120 minutes for initial diagnosisP0783 relates to 3-4 shift. Check the fault conditions and vehicle-specific procedure before replacing parts.P07844-5 ShiftCheck soonTransmission Issues30–120 minutes for initial diagnosisP0784 relates to 4-5 shift. Check the fault conditions and vehicle-specific procedure before replacing parts.P0785Shift Timing Solenoid ACheck soonTransmission Issues30–120 minutes for initial diagnosisP0785 relates to shift timing solenoid a. Check the fault conditions and vehicle-specific procedure before replacing parts.P0786Shift Timing Solenoid A Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP0786 relates to shift timing solenoid a range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0787Shift Timing Solenoid A LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP0787 relates to shift timing solenoid a low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0788Shift Timing Solenoid A HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP0788 relates to shift timing solenoid a high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0789Shift Timing Solenoid A IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP0789 relates to shift timing solenoid a intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P078AShift Timing Solenoid BCheck soonTransmission Issues30–120 minutes for initial diagnosisP078A relates to shift timing solenoid b. Check the fault conditions and vehicle-specific procedure before replacing parts.P078BShift Timing Solenoid B Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP078B relates to shift timing solenoid b range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P078CShift Timing Solenoid B LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP078C relates to shift timing solenoid b low. Check the fault conditions and vehicle-specific procedure before replacing parts.P078DShift Timing Solenoid B HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP078D relates to shift timing solenoid b high. Check the fault conditions and vehicle-specific procedure before replacing parts.P078EShift Timing Solenoid B IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP078E relates to shift timing solenoid b intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P078FTransmission Mode Switch C CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP078F relates to transmission mode switch c circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0795Pressure Control Solenoid CCheck soonTransmission Issues30–120 minutes for initial diagnosisP0795 relates to pressure control solenoid c. Check the fault conditions and vehicle-specific procedure before replacing parts.