Skip the auto shop - Our mechanics make house calls

Q: Crankshaft sensors

asked by on

Can the ecm on a 2004 Impala pull up a p0336 code when it gets hot I have replaced both crankshaft sensors and cam sensor and it's still pulling up the p0336 code and it's hard to start when it's been running for a while

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

A: If you have replaced all the sensors involv...

If you have replaced all the sensors involved, then you may have a problem inside the ignition module or the secondary ignition like the coil or plug wires could be arching to the engine harness causing a voltage spike. The code is generated when the ECM sees a difference in readings from the two crankshaft sensors in two drive cycles.

If there are no problems with the sensors, then there may be problems in the ignition module circuit from the crank sensor on the side of the engine or the other crank sensor to the ECM. My recommendation is to test the ignition wires to see if they are arching and make sure they are in all the correct wire holders and not all laying over the engine wire harness. Even if the wires are new but laying on a harness they will cause voltage interference. Also check the coils to make sure there is no arching or problems with the coils. However, I see this as mainly a wiring issue. If you want to have to have this checked, a technician from YourMechanic can come to your car's location to diagnose the Check Engine code and let you know what needs to be repaired.

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・Save up to 30%

Get a quote

What others are asking

Q: Electrical problems with car

Hi there. On the right front wheel well, there are a series of fusible links which distribute battery power to all of the vehicle's electrical systems. One is gray and is labeled "fusible link K," which supplies power to all...

Q: Float valve stuck

Hello. If the engine is running rich or flooding from too much fuel then the flaot may be stuck open. If it is not closing then it will barely run, if at all. It this started right after this carburetor...

Q: Hard clug noise and brakes locked; car barely moved

First thing to have checked are the problem codes that are causing the Check Engine light to be illuminated. This will direct you to the relevant problems that may have caused the stalling issue. Stalling issues can involve vacuum leaks,...

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 to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...