This means the engine's air/fuel mixture is too lean on Bank 2 of the engine. Bank 2 refers to one side of the engine (usually the side that doesn't contain cylinder #1). A lean mixture means there's too much air and not enough fuel.
Possible Causes:
* Vacuum Leaks: Leaks in the intake manifold, vacuum hoses, or other parts of the intake system can allow excess air to enter, making the mixture lean. This is a very common cause of this code.
* Fuel Delivery Problems: Issues with the fuel pump, fuel injectors (particularly on Bank 2), fuel filter, or fuel pressure regulator can restrict fuel flow, leading to a lean condition.
* Mass Airflow Sensor (MAF) Sensor Issues: A faulty MAF sensor can provide inaccurate readings to the engine computer (ECM), causing it to inject less fuel than necessary.
* Oxygen Sensor (O2 Sensor) Issues: A faulty O2 sensor (especially the one on Bank 2) can give incorrect readings, leading the ECM to compensate incorrectly.
* EGR Valve Problems: A malfunctioning Exhaust Gas Recirculation (EGR) valve can affect the air/fuel mixture.
* PCV Valve Issues: A clogged Positive Crankcase Ventilation (PCV) valve can cause a vacuum leak.
Troubleshooting:
Diagnosing P0174 requires a systematic approach:
1. Visual Inspection: Check all vacuum hoses and connections for cracks, leaks, or disconnections, paying close attention to Bank 2.
2. Fuel Pressure Test: Measure fuel pressure to ensure the fuel system is delivering adequate fuel.
3. MAF Sensor Check: Inspect the MAF sensor for dirt or damage. Consider cleaning it (carefully, following manufacturer instructions) or replacing it if necessary.
4. O2 Sensor Check: Check the Bank 2 O2 sensor for proper operation. This often involves using a scan tool to monitor its output.
5. Fuel Injector Test: Testing fuel injectors requires specialized equipment, typically done by a mechanic.
Important Note: Do not simply throw parts at the problem. Proper diagnosis is crucial to prevent unnecessary expenses. Using a scan tool to monitor live data can help pinpoint the source of the problem. If you're not comfortable performing these checks yourself, it's best to take your Camaro to a qualified mechanic for diagnosis and repair.
