Mileage- may or may not suffer depending on how much the air fuel mixture has changed.
1997 NISSAN ALTIMA MASS AIR FLOW SENSOR PROBLEMS CODE
Here are the typical symptoms that something is wrong when you have code P0172. For most people the first sign that anything is wrong at all is the service engine soon light coming on. There aren’t usually any drivability issues associated with P0172. Typically the code will be triggered by a rich condition in the engine.
The P0172 code on a Nissan Altima will often be thrown if the fuel injection system is not operating properly. This would be the opposite of a lean condition, which’ll throw P0171. Bank 1 refers to the rich condition being detected on the side of the engine with cylinder 1.Ī rich condition indicates that the air fuel mixture has too much fuel or not enough air. P0172 is thrown when the oxygen sensors detect that the air fuel mixture is too rich. It means that the motor is running with a rich condition. It’s not the most complicated OBDII trouble code to diagnose. This code number references a number that is given to you when you plug your car into a OBDII scanner. Give us a call today to schedule an appointment.A common trouble code with the Nissan Altima is P0172. Mike’s Auto Service & Repair in West Springfield, MA, can test your mass airflow sensor to make sure it is functioning properly. It will stutter and hiccup as you drive along and, depending on the air and fuel imbalance, it might even stall as you slow down and stop. Engine Hiccupsįinally, an air and fuel imbalance caused by a mass airflow sensor that is going bad can also make your engine hiccup. As you are driving along, if there is too much fuel in the engine, your engine may surge, which means it picks up speed even though you didn’t increase your foot pressure on the accelerator. It can also make your acceleration jerky. Too much fuel can make your engine hesitate because it is being flooded. Things that can cause additional stress on your engine include towing and driving up a steep hill. This will cause your engine to hesitate and drag, especially if it is under stress. If the mass airflow numbers indicate there is less air in the engine than there actually is, the ECM will reduce the amount of gasoline flowing into the combustion chamber. This can be attributed to the lean or rich fuel mixture being caused by the ECM because of the faulty MAF. It can also stall while you are idling, as discussed above. Engine Stalls After Starting or When Idlingīecause the air and fuel mixture isn’t balanced correctly due to the faulty mass airflow sensor, your engine may stall very quickly after you finally get it started. Either condition will make it hard to get your automobile started, especially on a cold morning. A rich fuel mixture could be flooding the engine with too much diesel fuel or gasoline.
A lean fuel mixture means that there isn’t enough fuel in the combustion chamber for the spark plugs to ignite. Difficulty Starting Your CarĪnother sign that the fuel mixture is off is problems starting your automobile. Your vehicle will have a hard time idling on either a lean or rich fuel mixture, and it will sputter and might even stall. The ECM may also increase the amount of fuel in the combustion chamber and create a rich fuel mixture. If the MAF is not reading the air influx correctly, the ECM may reduce the amount of fuel in the combustion chamber and create a lean fuel mixture. Mike’s Auto Service & Repair explains that this can throw the air and fuel mixture off and, as a consequence, you’ll notice the list of things below. The MAF communicates with the engine control module (ECM), and if it sends misread air amounts, the ECM will adjust how much fuel it allows into the combustion chamber. Tasked with keeping track of how much air flows into the engine, the mass airflow (MAF) sensor plays a key role in determining how much air needs to be in the combustion chamber.
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