Skip the auto shop - Our mechanics make house calls

Q: I can't accelerate or go fast while driving - 2002 Nissan Sentra

asked by on

When I fully step on the accelerator the vehicle will be moving at a speed of 40kmh and I can't even over take other vehicles

My car has 15000 miles.
My car has an automatic transmission.

A: Hi there. The lack of acceleration you feel...

Hi there. The lack of acceleration you feel suggests several possibilities. There could be low fuel pressure caused by a faulty fuel pump or a faulty fuel pressure regulator. It could be a lack of incoming air to the engine caused by a very dirty air filter or a faulty MAF (mass airflow) sensor, incorrectly calculating the incoming air to the engine.

A restricted exhaust system caused by a plugged catalytic converter is also another possibility. There are more possibilities: a faulty TPS (throttle position sensor), engine or ignition timing problems, etc. I recommend having your vehicle’s [lack of power during acceleration](https://www.yourmechanic.com/services/car-is-not-getting-enough-power-inspection diagnosed and repaired by a certified technician, such as one from YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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

Q: No crank no start no communication with BCM

If the Security light on your dash is on or flashing, the Passlock system is either in a confused state, or has locked you out. Pulling the Clstr/BCM fuse, then replacing it, will reset the Passlock, but may not release...

Q: How do I break in the car?

If your car is new, you will need to break it in. Here are some guidelines to follow: 1. For the first 500 miles, avoid towing a trailer. 2. For the first 1,200 miles, avoid overly quick starts, or hard...

Q: My 1993 GMC Sierra will barely go past 40mph

This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...