Some Examples: Air filter clogged Exhaust leak plugged cat clogged
fuel injector malfunctioning
fuel pressure regulator clogged
fuel filter malfunctioning
fuel pump spark plugs, wires, cap, rotor, coil Vacuum leak dirty throttle body malfunctioning fast idle thermo valve (similar to vacuum leak) low oil (unless there is an oil level sensor) belts gaskets
seals rings low compression bearing damage (rod knock) Broken cam rocker fell / broke off broken valve spring stuck valve critical engine damage (windowed the block) wiring, fuses, relays starting system - ignition switch, starter, relay Cooling system - clogs, leaks, flow (may throw a code if you overheat) transmission clutch (es) driveshaft, differential, axles brakes suspension tires hvac lights gauges
Vehicles manufactured from November 2009 to January 2010 could suffer from leaky
injectors and
fuel pipes, while diesel models built between August and October 2010 were at risk of having cracked
fuel pump
seals.