Skip the auto shop - Our mechanics make house calls

Q: Check Engine Light is ON sometimes and then it turns OFF and then turn back ON again

asked by on

The Check Engine Light of my car turn ON and suddenly when I am driving it turns OFF and it turns ON again. I have an OBDII scanner that I used to scan my ECM and the faulty code read as P0337 which is Crankshaft Position Sensor 'A' Circuit Low Input. I was wondering is it a bad Crankshaft Position sensor or is it something else?

My car has 129400 miles.
My car has an automatic transmission.

Based on the information you provided. Your crankshaft position sensor is the most likely cause of your concern. You may also see a p0339 code which is also a crankshaft position sensor code. I recommend having a certified professional inspect the Check Engine Light code in person before moving forward with a repair since it could be a closely related part causing the problem.

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
  • Check Engine Light is ON sometimes and then it turns OFF and then turn back ON again

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 stutters when idling

Engine misfires can be caused by many different problems and are generally caused by either a spark or fuel issue or in some cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft...

Q: I have a blown main shaft seal on my 95 Honda accord lx

The crankshaft on your car engine has an oil seal in the front and rear of the block. If the seal at the front of the block, that is behind the crank pulley, is leaking that seal is relatively easy...

Q: Temperature gauge not reaching appropriate temperature.

When replacing thermostats, or if you are trying to diagnose a problem, the best thing to do is install the OEM (i.e., dealer supplied) thermostat. Assuming that the thermostat you got is "good" (i.e., opening at OEM specified temperature 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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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.