Q: My 2005 infiniti qx56 is not starting. It is as if the fuel pump switch was triggered. it acts as if is going to turn on but does

asked by on

My 2005 infiniti qx56 is not starting. It is as if the fuel pump switch was triggered. it acts as if is going to turn on but does not. it has a new fuel pump, sensor and throttle body. Could it be some type of security

Typically if the security system is preventing the vehicle from starting, the security light may be flashing. You vehicle’s keys are equipped with a transponder in each key. This is a computer chip that changes codes every time the vehicle is started. The ignition/security system reads the transponder codes when you turn the ignition on. If all is functioning properly, the security system will recognize the key and allow the vehicle to start. If it does not recognize the key, the security system may not allow the fuel pump, ignition, or both, to power up. Try to start the vehicle with another key if you have one. If it starts, then the first key is faulty and has to be replaced. If you do not have another key, you may be able to take the key to your local Infiniti dealership for them to check it. If the key is good, then the fault is elsewhere. Other components or sensors can be the cause. The crankshaft sensor for example. The engine control unit relies on the crankshaft position sensor to relay information as to the position of each cylinder. This is in order to control spark and fuel injector firing times. When cranking the engine, the engine control unit looks for the crankshaft sensor signal. If it does not get those signals, the fuel pump, ignition system, or both may also not power up. If the key is not the issue, have a certified technician look into the no start condition in order to find and correct the issue.

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
  1. Home
  2. Questions
  3. My 2005 infiniti qx56 is not starting. It is as if the fuel pump switch was triggered. it acts as if is going to turn on but does

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: Car has sat for a month and won't start

It's not uncommon for your battery to be drained down if your car sits for a month without starting. Modern vehicles have a lot of technology which requires a lot of computers. Those computers have what is called keep alive...

Q: Squeak/screech noise, burning smell

This may very well be related to the catalytic converter in your car. As you know, the catalytic converter is responsible for converting toxic combustion gases into less harmful gases to be dispelled into the atmosphere via your car's exhaust...

Q: I am buying a used car, and the alternator is getting replaced in the vehicle before I get it. Does this raise any red flags?

A replacement of the alternator should not raise a red flag bu I would recommend getting the vehicle (inspected) [https://www.yourmechanic.com/services/pre-purchase-car-inspection] before you purchase it by a mechanic like one from YourMechanic. This will insure you do not have major problems...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.