Battery problems
*Weak or dead battery
*Corroded or loose battery terminals
* Problems with the charging system (alternator or regulator relay)
Starter problems
* Faulty starter (retractor relay, drive)
*Weak or dead battery
* Poor contact with battery
*Wiring problems
Problems with the generator
* Faulty generator
* Loose drive belt
*Wiring problems
* Voltage regulator problems
Wiring problems
* Broken or damaged wires
* Poor connections
*Blown fuses or relays
* Closures
* Grounding problems
Problems with the ignition system
* Faulty spark plugs or ignition wires
* Faulty ignition module (for ignition systems without distributor)
* Faulty ignition distributor (for distributor ignition systems)
*Faulty crankshaft or camshaft sensor
Problems with the lighting system
* Burnt out light bulbs
*Faulty switches or relays
*Wiring problems
* Problems with the lighting control module (BCM)
Electronics problems
* Faulty sensors (eg engine speed sensor, engine temperature sensor)
* Faulty actuators (e.g. fuel injector, valve timing control solenoid)
* Software problems (for example, failures in the engine control unit)
* OBD-II connection problems
Other problems
* Problems with door or trunk locks
* Problems with power windows
* Problems with the air conditioning or climate control system
* Problems with alarm or immobilizer