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Car cranks but does not start

Tiny
CHRISP512
  • MEMBER
  • 2003 HYUNDAI SONATA
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 225,860 MILES
I replaced the crankshaft angle sensor and the car drove like a dream after forty miles it stalled at 65 mph and will not start back up it cranks but does not start. What could be the problem? It has been sitting over 24 hours and still nothing.
Sunday, August 12th, 2018 AT 9:23 PM

7 Replies

Tiny
STEVE W.
  • MECHANIC
  • 13,567 POSTS
What was the reason for replacing the original sensor? Code or failure? If a code, what was it? Was the new part OEM or after-market?
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Monday, August 13th, 2018 AT 5:10 AM
Tiny
CHRISP512
  • MEMBER
  • 6 POSTS
The car had three codes; crankshaft angle sensor, EGR malfunction and EVAP leak. AutoZone print out recommended changing the gas cap, but when I bought the car I was informed that the crankshaft position sensor was going bad so I replaced it with a Duralast from AutoZone.
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Monday, August 13th, 2018 AT 7:32 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,567 POSTS
So it was running okay? But had those codes. You replaced the CAS and then it shut off.
I would try installing the old one first if you still have it. Usually that sensor just outright fails, when you do get a code it is commonly not the sensor that is bad.
If the car has a tachometer, does it show any motion when you try to start it?

The EGR could also be stuck open, that causes a large vacuum leak which leans out the mix to the point the engine will not fire.
Do you happen to have the actual code numbers that were in it? Those can help a lot.
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Monday, August 13th, 2018 AT 12:33 PM
Tiny
CHRISP512
  • MEMBER
  • 6 POSTS
The code I have is p0335.
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Tuesday, August 21st, 2018 AT 1:31 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,567 POSTS
Okay, that is a crank sensor circuit code. 90% of the time it is not the sensor but the wiring or connection to it. Even a small issue is a big deal with that because the signal is very low to begin with. I would trace the wiring and see if the harness shows any damage or corrosion.
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Tuesday, August 21st, 2018 AT 3:12 PM
Tiny
CHRISP512
  • MEMBER
  • 6 POSTS
The timing belt actually cut the wires for the crankshaft position sensor I used a couple butt connectors and it has been running beautifully for three days now. Thanks for the assistance.
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Sunday, August 26th, 2018 AT 7:49 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,354 POSTS
Steve W is one of our best! Use 2CarPros anytime, we are here to help. Please tell a friend.

Cheers, Ken
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Wednesday, August 29th, 2018 AT 12:58 PM

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