Question about 2003 Nissan Primera
I have heard yes & no. When the Ac pump clutch engages, im sure there is more load. resulting in less mpg. But if your having significant variation in mpg. I would pay attention to where i purchase gasoline. There are reports where i live, that the local shell gas, has dropped many owners mpg. I too noticed this. Remember also, your paying for & getting 90% gas, 10 alcohol. if you have 100% gas where you live, i would only use that. Make sure you air filter is clean, you can tap them out, ive even vacumed them clean with a shop vac. make sure oil is change per your manual, its probably every 5000-7500 miles. Use Quality oil, >not jiffy lube.... Get & keep a pressure gauge for your tires, keep them inflated properly, they will wear longer & low tires will affect your mpg negatively
Posted on Apr 19, 2014
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Posted on Jan 02, 2017
Tips for a great answer:
MAF: A Mass Air Flow (MAF) sensor output that causes the PCM to sense a lower than normal air flow will cause a lean condition.
Air Induction System: Air leaks into the induction system which bypass the MAF sensor will cause a lean condition. Check for disconnected or damaged vacuum hoses, incorrectly installed or faulty crankcase ventilation valve, or for vacuum leaks at the throttle body, EGR valve, and intake manifold mounting surfaces.
Fuel Pressure: Perform a fuel system pressure test. A faulty fuel pump, plugged filter, or faulty fuel system pressure regulator will contribute to a lean condition.
Injector(s): Perform injector coil/balance test to locate faulty injector(s) contributing to a lean or flooding condition. In addition to the above test, check the condition of the injector O rings.
EGR: Check for leaking valve, adapter, or feed pipes which will contribute to a lean condition or excessive EGR flow.
Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
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Fuel Trim Bank Two Condition
- The ECM has detected a rich or lean air/fuel ratio condition on engine bank two
Fuel trim bank one condition
- The powertrain control module uses the oxygen sensor to calculate the air/fuel ratio of the engine. The computer has recognized a rich or lean condition on one engine bank only.
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