- Faulty fuel injector(s)
- Clogged fuel filter
- Faulty ignition coil(s) or spark plugs
- Faulty exhaust gas recirculation (EGR) valve
- Faulty catalytic converter
- Faulty throttle position sensor (TPS)
- Faulty mass air flow (MAF) sensor
- Faulty camshaft or crankshaft position sensor