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9,253 diagnostic guides

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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.

Electrical & Charging System P · Powertrain Clear all

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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 1345–1368 of 1797

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P0EC7A/C Power Supply Relay Control Circuit LowLow priorityElectrical & Charging System45–120 minutes for initial diagnosisP0EC7 concerns a/c power supply relay control circuit low. Learn what this fault indicates and where to begin diagnosis.P0EC8A/C Power Supply Relay Control Circuit HighLow priorityElectrical & Charging System45–120 minutes for initial diagnosisP0EC8 concerns a/c power supply relay control circuit high. Learn what this fault indicates and where to begin diagnosis.P0EC9A/C Refrigerant Distribution Valve A Stuck/OpenLow priorityElectrical & Charging System45–120 minutes for initial diagnosisP0EC9 concerns a/c refrigerant distribution valve a stuck/open. Learn what this fault indicates and where to begin diagnosis.P0ECAHybrid/EV Battery Temperature Sensor System - Multiple Sensor CorrelationCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ECA concerns hybrid/ev battery temperature sensor system - multiple sensor correlation. Learn what this fault indicates and where to begin diagnosis.P0ECBHybrid/EV Battery Voltage Sensor System - Multiple Sensor CorrelationCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ECB concerns hybrid/ev battery voltage sensor system - multiple sensor correlation. Learn what this fault indicates and where to begin diagnosis.P0ECCHybrid/EV Battery E VoltageCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ECC concerns hybrid/ev battery e voltage. Learn what this fault indicates and where to begin diagnosis.P0ECDHybrid/EV Battery E Voltage UnstableCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ECD concerns hybrid/ev battery e voltage unstable. Learn what this fault indicates and where to begin diagnosis.P0ECEHybrid/EV Battery E Voltage LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ECE concerns hybrid/ev battery e voltage low. Learn what this fault indicates and where to begin diagnosis.P0ECFHybrid/EV Battery E Voltage HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ECF concerns hybrid/ev battery e voltage high. Learn what this fault indicates and where to begin diagnosis.P0ED0Hybrid/EV Battery F VoltageCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ED0 concerns hybrid/ev battery f voltage. Learn what this fault indicates and where to begin diagnosis.P0ED1Hybrid/EV Battery F Voltage UnstableCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ED1 concerns hybrid/ev battery f voltage unstable. Learn what this fault indicates and where to begin diagnosis.P0ED2Hybrid/EV Battery F Voltage LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ED2 concerns hybrid/ev battery f voltage low. Learn what this fault indicates and where to begin diagnosis.P0ED3Hybrid/EV Battery F Voltage HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ED3 concerns hybrid/ev battery f voltage high. Learn what this fault indicates and where to begin diagnosis.P0ED4Generator Phase X CurrentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ED4 concerns generator phase x current. Learn what this fault indicates and where to begin diagnosis.P0ED5Generator Phase X Current LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ED5 concerns generator phase x current low. Learn what this fault indicates and where to begin diagnosis.P0ED6Generator Phase X Current HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ED6 concerns generator phase x current high. Learn what this fault indicates and where to begin diagnosis.P0ED7Generator Phase Y CurrentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ED7 concerns generator phase y current. Learn what this fault indicates and where to begin diagnosis.P0ED8Generator Phase Y Current LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ED8 concerns generator phase y current low. Learn what this fault indicates and where to begin diagnosis.P0ED9Generator Phase Y Current HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0ED9 concerns generator phase y current high. Learn what this fault indicates and where to begin diagnosis.P0EDAGenerator Phase Z CurrentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EDA concerns generator phase z current. Learn what this fault indicates and where to begin diagnosis.P0EDBGenerator Phase Z Current LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EDB concerns generator phase z current low. Learn what this fault indicates and where to begin diagnosis.P0EDCGenerator Phase Z Current HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EDC concerns generator phase z current high. Learn what this fault indicates and where to begin diagnosis.P0EDDHybrid/EV Battery Pack B DeteriorationUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0EDD concerns hybrid/ev battery pack b deterioration. Learn what this fault indicates and where to begin diagnosis.P0EDEHybrid/EV Battery Pack C DeteriorationUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0EDE concerns hybrid/ev battery pack c deterioration. Learn what this fault indicates and where to begin diagnosis.