* Faulty spark plugs or ignition coils
* Dirty or blocked fuel injectors
* Faulty fuel pump
* Vacuum leak
* Faulty air flow sensor
* Faulty oxygen sensor
* Faulty catalytic converter
* Blocked exhaust system
Possible causes of instrument panel not working:
* Faulty instrument cluster
* Faulty electrical connection
* Faulty fuse or relay
* Faulty ignition switch
* Faulty battery or alternator