Q: Fixed crank shaft position sensor and engine light still on 2001 BMW 325i

asked by on December 06, 2016

Okay so My car had been stalling to start and the check engine line came on, so natrually I took it to my dad's mechanic. He then put the scanner in my car and said it was the crank shaft position sensor, so I bought it and he had installed it and that day the light had gone away, but thecar was still having trouble starting so he assumed it was the spark plugs that needed changing, so the next day i went to buy the spark plugs and the light came on again and i called him and he said hed take a look at it when he changed the spark plugs, so when he came, he changed the spark plugs and put the scanner in again and it said that the crank shaft position sensor was acting up again, so my question is What could be wrong with my car that it's not accepting this new crank shaft? because he reccomends getting the crank shaft straight from the bmw dealer instead of another brand but I don't want to keep paying for a new crankshaft and paying the labor fees if the car will keep acting up

My car has 149000 miles.
My car has an automatic transmission.

Car is hard to start Inspection $79.99 - $89.99 Get a Quote

Hi there - there are a couple of possibilities. First off, the new crankshaft position sensor (CPS) could be faulty - not all replacement parts are reliable. Second - there could be a problem with the wiring for the CPS circuit. Some engines use both crankshaft and camshaft position sensors to apply more accurate spark timing for the engine. The loss of either signal sometimes triggers a misleading code. SInce your engine is still hard to start, and the Check Engine is still illuminated, I would recommend an engine inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

The fuel gauge moves up and down I never know how much gas I have

The fuel sending unit is in the fuel tank mounted to the fuel pump assembly. The sending unit is shorted or open and needs to be tested using a gauge tester or by removing it and measuring the resistance of...

I have a 2001 BMW 325i. It overheated, engine shut down. When cooled down (24 hours), while water poured in the reservoir I could

I'm not clear on where you see your leak, but if it is in the radiator tank itself, that will mean you at least need a radiator. If the car ran hot until it shut off, there may have been...

Water pump leaking

Depending on the source of the leak, you may need to replace the entire water pump or just the water pump gasket. It sounds like you may have a water pump that may not be pumping correctly or may be...

drive side (L.H) lower control arm does it have tenssion on it? If so what will i need to get the tension off?

Considerable disassembly is required on this model in order to remove and replace the left lower control arm. Among the many steps in the repair procedure, the steering shaft linkage must be disconnected and the sub frame of the vehicle...

Two new xenon light bulbs burn out instantly as soon as they are turned out.

If the old bulb wasn't burnt out by the ballast, the new ones shouldn't either. The most likely cause of your woes are the cheap bulbs. I would strongly suggest only purchasing name brand bulbs. They may be much more...

How do you start car after running out of exhaust fluid?

Hi there. There is a sensor in the diesel exhaust fluid tank that measures how much fluid is in there. This is why the dash can tell you how much fluid is remaining in the tank. The engine will not...

Why would there be smoke coming from under my hood and now my car does not shift 2001 Honda Civic

Hi there. It seems that the transmission fluid is leaking. Check the cooler hoses from the transmission to the radiator on the car and see if they are leaking. A leak on the transmission will cause the vehicle to not...

Right headlight randomly goes off

Hello there. A few different parts can cause the bulb to intermittently work. The most likely is the bulb itself beginning to fail. Sometimes they do not fail immediately but will work at times until they fail fully. Other possible...

Spark plug

It's never a good idea to drive a car with a misfiring engine! If the misfire is due to a bad spark plug as you are presuming, there could be secondary ignition voltage feeding back to the ignition system which...

Related articles

How Do Rain-Sensing Wipers Work?
Several Several decades ago, the only settings windshield wipers came with were low, high, and off. Later, an intermittent wiper feature was integrated into many windshield wiper switches, allowing drivers to reduce the frequency of wiper movements based on the...
Symptoms of a Bad or Failing Crankshaft Seal
If your car is reaching high mileage or is experiencing oil leaks, it may be time to replace the crankshaft seal.
How Long Does a Cylinder Head Temperature Sensor Last?
The The engine’s performance is largely based on temperature measurements performed by the engine control module (ECM), also known as the vehicle’s computer. As the temperature of the engine increases, the resistance decreases which means the voltage drops. The computer...