Skip the auto shop - Our mechanics make house calls

Q: Car won't start. Could a sensor be at fault?

asked by on

2006 nissian not starting we were told it coulf be a sensor its been running on 3 cillenders miss firing at times.

My car has 150000 miles.
My car has an automatic transmission.

A: With the limited information available, I c...

With the limited information available, I can only assume that no testing has been done at this point in time. You will want to start by running a scan for codes. This will tell you of any electrical issues the computer has detected.

If a sensor has failed, you will likely see it here. There is a strong possibility that something electrical is at fault. If this scan turns out negative, you will need to look into the fuel, air, and spark systems. The fuel system consists of the pump, filter, injectors, and lines (for the most part).

When you first turn the key to on (before attempting to start it), listen for the faint "whirling" of the fuel pump priming. If you do not hear this your pump may have failed.

Does pressing on the gas make a difference? Due to the fact you were running with one cylinder down to begin with, you will want to try the spark system next. Visually inspect the plugs and wires for moisture, damage, or engine grime. These will all cause a bad connection to one or more of the plugs.

The distributor may also be at fault, and you should inspect it for damages as well. The issue may not be visible, so just because it looks alright doesn’t mean its working.

There are many other steps you will need to take in order to properly diagnose an issue like this. Consider having your car’s no start condition properly diagnosed at your location by one of our mobile technicians.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: 2007 Nissan Sentra completely dead

From the information provided on your Nissan Sentra, it leads me to believe that your vehicle may have an electrical problem. It is very likely that the main fuse for the Sentra has failed, and that is preventing the battery...

Q: Car not shifting out of first

There is a common problem with shift solenoids on these cars going bad. You should get a code on the computer if that is the case. I would recommend having the transmission flushed by a certified mechanic. They have a...

Q: High RPMs, but throwing the error code P0340.

Hello. P0340 is the code for camshaft position sensor circuit malfunction. A few common causes for this are a faulty cam position sensor, connector, or wiring. The first thing I would do is carefully examine the cam position sensor and...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...