Q: excessive gas consumption, loud noise, check engine light is on

asked by on May 03, 2017

I have a 98 Nissan Altima that is making a loud noise, there is excessive fuel consumption, check engine light is on, car hesitates to start and when pressing the gas pedal, hesitation on acceleration, and car dies while driving. Could it be a problem with the mass airflow sensor? If so, does that explain the loud noise that's coming from the engine? What could the problem be and how much would it cost to fix it?

Faults with the mass air flow sensor do not cause noise. The noise could be due to exhaust leaks, or internal faults in exhaust components such as the muffler or resonator if equipped. Belt driven accessories can be the source of abnormal noises as well. With regard to the excessive fuel consumption and the acceleration issue, inasmuch as the check engine light is on, the very first priority is to obtain any and all codes that have set and track those down (that is, perform the required diagnostics) because often faulty components implicated in those codes will be the cause of the problems you are having. Once all codes are investigated, any found faults repaired, and all codes cleared, if trouble remains a more specific diagnostic is performed tied to the operating fault. If you want to get the process started, just request a check engine light diagnostic and a certified mechanic will be dispatched right to your door. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

P0300 & p1133

Inasmuch as the car was running fine before the work was done, the likeliest explanation is that the timing was belt was installed out of position, that is one tooth off. Such will cause the engine to run very badly,...

Fuel pressure regulator

The fuel pressure regulator and fuel filter is mounted on top of the fuel tank pump mounted in the fuel tank. It is recommended to be replaced anytime the fuel pump is replaced.

Check Engine Light is on

Your check engine light may come on for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter, bad spark plugs or wires and many other reasons. Unfortunately due to the...

Related articles

P0225 OBD-II Trouble Code: Throttle/Pedal Position Sensor/Switch C Circuit Malfunction
P0225 P0225 code definition Throttle/Pedal Position Sensor/Switch C Circuit Malfunction What the P0225 code means P0225 is a generic OBD-II code which indicates that the throttle/pedal position sensor/switch C circuit has an internal failure. The sensor went out of range,...
P2250 OBD-II Trouble Code: O2 Sensor Ref Voltage Circuit High Bank 2 Sensor 1
P2250 means an issue with the upstream oxygen sensor voltage circuit in bank 2 due to a faulty sensor, fuel pressure, or engine or exhaust leaks.
P0028 OBD-II Trouble Code: Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)
P0028 P0028 trouble code definition Intake Valve Control Solenoid Circuit Range/Performance (Bank 2) What the P0028 code means P0028 is the OBD-II generic code indicating the engine control module (ECM) has determined that the variable valve lift for the intake...