How does a crank sensor work on a car?
A crank sensor relays information to the vehicle’s computer, referencing how fast the engine is running, but more importantly the position of the crankshaft and the cylinder.
What happens if your crankshaft sensor is bad?
You now have to crank the engine over. You will see spark-jump between both ignition terminals. if you did not see a spark, then that means the fault on crankshaft position sensor is really bad and you may not able to start the car without replacing or repairing the crankshafts. In this case, you will have to consult your mechanic.
What should the CKP sensor read on a crankshaft?
Touch the DMM red lead to the red (power) wire on the harness connector. You may need to check the wiring diagram for your particular model, if the CKP sensor uses wires of different color to identify the ground, power and signal wires. Turn the ignition key to the On position. Your meter should read between 5 and 13 volts.
What does a crank sensor do on an ECM?
You should hear a spark click and injector noid pulse. These are to test the ECM crank sensor circuit response. On both tests, you should see a spark click and injector pulse. Crank sensor is the main input to the ECM. If ECM working, then the crank is the only other issue.
What happens if the crankshaft sensor does not work?
If the crankshaft position sensor fails, it will not send information about the position of the crankshaft and speed of the engine RPMs to the ECU. As a result, the ECU doesn’t know when to send the spark plugs and how to adjust the fuel mixture. This can cause your car to stall or hesitate to start.
Where is the crankshaft position sensor located on a car?
On some occasion, the CPS can be located at the back or rear of the engine and sometimes the side of the engine. When the crankshafts position sensor (CPS) measures the speed of the clutch flywheel to ascertain crankshaft speed, then it is most likely to be around transmission bell house of the car.
How can I test the crank sensor response?
With key on, disconnect crank sensor, and repeatedly tap on the signal wire. You should hear a spark click and injector noid pulse. These are to test the ECM crank sensor circuit response. On both tests, you should see a spark click and injector pulse. Crank sensor is the main input to the ECM.
How much does it cost to replace a crankshaft sensor?
The average cost to replace a crankshaft sensor ranges between $150 and $250. However, it’s not uncommon for those prices to skyrocket if you have a higher-end vehicle. That’s because the labor costs are typically between $90 and $110. From there, the rest of the cost comes down to parts.