P0113 is Intake Air Temperature Circuit High Input, Internally failed IAT sensor Faulty connection at IAT sensor Open in IAT ground circuit or signal circuit Short to voltage in IAT signal circuit or reference circuit IAT harness and/or wiring routed too close to high-voltage wiring (e.g. alternator, spark plug cables, etc.) Faulty PCM (less likely but not impossible)
P0172 is Fuel Trim System Rich Bank 1, Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Faulty Mass Air Flow (MAF) sensor
P0304 is Cylinder # 4 Misfire, Known Failure Points:
1. Plugs- specifically Bosch Platinum plugs tend to self-destruct
2. Ignition Control Module- Kinda a "go" or "no-go" type thing. When it fails, you most likely won't be able to start your car.
3. Coil Pack Housing (usually white, some aftermarket are black) - Seems like an unlikely part to go, but from what I hear the plastic can breakdown and cause crossfiring.
4. Coil Pack- Haven't had a bad one yet, but it's entirely possible.
5. Plug Boots- If they're old, they might dry out and crack due to the high heat they are exposed to. Again, not very likely, but when all else fails.
Jul 15, 2014 |
2000 Oldsmobile Alero