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Crank no start, code P0340

Tiny
BOGOSIAN
  • MEMBER
  • 2004 SCION XB
  • 1.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 70,000 MILES
My car cranks fine but won't start in the morning and has no spark, but later in the afternoon it has spark and runs fine. The error code p0340 is flagged but no engine lights on dashboard.
Sunday, June 28th, 2020 AT 9:47 AM

7 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
This code is for a cam sensor circuit performance Bank 1. That is unlikely to cause a no start if the check engine light is no actively on.

However, it could go stored once you cycle the key so we need to run through the testing to find out what is causing the code and then see if the no start is cured as well.

Let me know if you have questions. I attached the test for your review. Thanks
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Sunday, June 28th, 2020 AT 4:42 PM
Tiny
BOGOSIAN
  • MEMBER
  • 4 POSTS
Why does my car start and run normal in afternoon, but cranks and won't start in the morning?
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Monday, June 29th, 2020 AT 6:33 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
If the sensor is failed it may just be sensitive to temperature but there is no definitive reason for this. Clearly the environmental differences have an effect on the vehicle to cause this. However, most of the time it is not the temperature between the morning and afternoon, it is just a coincidence, which is why we need to run through the testing to confirm it is a sensor issue.
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Monday, June 29th, 2020 AT 8:00 PM
Tiny
BOGOSIAN
  • MEMBER
  • 4 POSTS
  • 2004 SCION XB
  • 1.5L
  • 4 CYL
  • 2WD
  • 70,000 MILES
My car cranks but won't start in the morning. I checked for spark and no spark. I checked for ground and e everything tested good. Retested for spark in the afternoon and I have spark and car runs like normal. Next morning same thing crank no spark and car runs in afternoon.
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Friday, July 3rd, 2020 AT 11:21 AM (Merged)
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
How did you make out with the camshaft code diagnosis? Do you still have the P0340 code? If so, we need to chase that down. I attached a spark test for your review and as you will see it is having you test the cam sensor for on open or resistance. So the fact that you have a cam code, is most likely the issue.

Run through this information and let me know what you find. Thanks
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Friday, July 3rd, 2020 AT 11:21 AM (Merged)
Tiny
BOGOSIAN
  • MEMBER
  • 4 POSTS
Found the problem finally; had time to investigate crankshaft position sensor and I have a power steering leak and has been accumulating on the senor pigtail. I disconnected the pigtail and oil was dripping out of the port on the sensor, removed the sensor tested it after cleaning the oil out of port, it is read the correct ohms. Finished cleaning and drying out connector and success engine fired up. Now I have to tackle the leaking power steering pump.
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Friday, July 3rd, 2020 AT 2:45 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Wow. Great find. Thanks for the update. Let us know if you need help with the leak.

https://www.2carpros.com/questions/new
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Saturday, July 4th, 2020 AT 7:04 PM

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