Skip the auto shop - Our mechanics make house calls

Q: I fixed the crankshaft sensors and cam sensor and it's still pulls up the crankshaft code can it be my ecm

asked by on

I replaced my crankshaft sensors and my cam sensor on my 2004 Impala 3.4l and it's still pulling up the crankshaft code and when it gets hot it's hard to start till it cools down then it starts could it be my ecm

My car has 135 miles.
My car has an automatic transmission.

You will need to monitor the crankshaft sensor input to the ECM to see if the signal is correct or going away when it gets hot. This is caused when a sensor is not producing a strong enough signal or when the sensor is too far away from the sensor ring.

Perform the test and also make sure the sensor is correctly positioned as close to the sensor ring as possible. This engine had two types of sensors for this year. There is one on the side of the engine block and another behind the crank pulley. Make sure that the pulley sensor ring is not bent and the pulley itself is fully seated.

If you need some assistance with these checks, consider contacting a qualified mechanic who can diagnose the trouble code and make the necessary repairs to your vehicle.

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!
  • Home
  • Questions
  • I fixed the crankshaft sensors and cam sensor and it's still pulls up the crankshaft code can it be my ecm

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: Where is the ambient air temperature sensor located on a 2016 impala LTZ?

There is more than one ambient temperature sensor on your vehicle. The engine air intake system has an ambient temperature sensor located in the air duct after the air filter. That sensor is part of the mass airflow sensor assembly....

Q: Intermittently, gas pedal sticks and car keeps accelerating

This can be caused by a variety of things. I would agree with the dealer that floor mats can often times interfere with the pedals in a car. The other thing I would be sure to check is the cruise...

Q: A piece of grommet fell into the intake manifold.

This grommet is on the valve cover if I remember correctly and typically a small piece of material falling in would not be a big deal. It is best not to start the engine and attempt to have the piece...

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 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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.