Ignition failure sensor

SHOP_ABY

MEMBER
2001 HYUNDAI SANTA FE
100,000 MILES

I have a 2001 hyundai santa fe 4 cyl. We are thinking that my ignition failure sensor has something wrong. What is the use of this part? Is it also called ignition misfire sensor? When I drive my car the engine stops suddenly. We already replaced the spark plug, spark plug wire, ignition coil and camshaft sensor. When we accelerate, it misfire then dies off.

Or what you called ignition misfire sensor? Because I bought this part at Rockauto. Com and I saw the image in google. So Im wondering what it is. Its located above the camshaft sensor.

please help

5 Replies

WRENCHTECH

MECHANIC
20,757 POSTS

Alldata does not reference any part by that name but looking at the wiring diagram, I do see a part by that name in the circuit. Look on the end of the head toward the rear, opposite the cam sensor and see if anything is in that area. It's always possible that it's only used on some models.

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Friday, August 9th, 2013 AT 4:11 AM

DAVID HALL2

MEMBER
1 POST
2001 HYUNDAI SANTA FE
2.4L
4 CYL
FWD
AUTOMATIC
151,000 MILES

My vehicle cranks but will not fire. When I got the car, the guys said it needed a computer. I purchased a used computer, plugged it in and nothing. Sent back for warranty, received another one. Plugged in, doing same exact thing. Everything is working, or so it seems, but I am not getting a signal to make the coils fire. I noticed that the crank sensor looks pretty rough, as the green circuit board is showing and it has what looks like melted plastic at the opening where the crankshaft disc goes in. Would a faulty crank sensor stop the computer from sending a coil signal?

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Thursday, March 9th, 2017 AT 9:46 AM (Merged)

SATURNTECH9

MECHANIC
30,870 POSTS

Yes you would lose spark with a bad crankshaft position sensor. If you have a multi meter you can measure the resistance of it. It sounds like it he seen better days.

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Thursday, March 9th, 2017 AT 9:46 AM (Merged)

JOAQUIN GONZALES

MEMBER
1 POST

Having the same problem on I have a simple scanner so I scan the car with the key on but no code was show so my question is. Can a simple scanner find a bad crank sensor just with key on or have to show rpm to see if crank sensor is sending signal.

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Thursday, March 9th, 2017 AT 9:46 AM (Merged)

KEN L

MASTER CERTIFIED MECHANIC
42,883 POSTS

The ignition failure sensor is connected between the ignition coil fuse and ignition coils to detect ignition failure.

As the crankshaft turns the engine control module (ECM) receives the signals of CKP and CMP sensors. Based on these input signals the ECM controls the power relay coil, and battery voltage is applied to the ignition coils. The ECM controls the current through the ignition coil by turning the power transistor (built-in to the ignition coil) on and off.

When current through the primary winding is stopped (at the moment the power transistor is turned off), a high voltage is induced in the secondary winding of the ignition coil. The high voltage is applied to the two spark plugs that are connected in parallel.

Please let me know if you need anything else to get the problem fixed.

Best, Ken

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