Car will not start and it is throwing off code the code 3, 4, 7?

Tiny
COLIE
  • MEMBER
  • 2011 CHEVROLET TRAVERSE
  • 2WD
  • AUTOMATIC
  • 161,000 MILES
Got my timing chain fixed new battery alternator purge valve and oil change
almost 2 weeks ago and now my car won't start and it's throwing off code the code 3, 4, 7 and it says crankshaft sensor a and b.
Monday, February 19th, 2024 AT 2:21 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

Do you mean the code is P0347? Let me know that, but also, I want you to check something.

First, see if the engine starts if you use starting fluid. If it does and then stalls, we will know it is a fuel-related issue. I'm suggesting this because the P0347 is related to a camshaft position.

If there is no change with starting fluid, I need you to check if there is spark at the plugs. If the problem is a faulty crankshaft position sensor, chances are there will not be an ignition spark at the plugs.

Here is a link that explains how that is done:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Let me know what you find.

Joe
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Monday, February 19th, 2024 AT 9:05 PM
Tiny
COLIE
  • MEMBER
  • 2 POSTS
The car doesn't start at all those are all different codes.
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Monday, February 19th, 2024 AT 10:00 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

Diagnostic trouble codes are a letter followed by four numbers. Most powertrain codes start with the letter P. I'm not sure what the individual numbers you listed indicate. Individually, they are not diagnostic codes.

As far as the no start, does the starter motor turn the engine but it doesn't run or is it the starter isn't engaging? If the starter is turning the engine, check to see if it will start with starting fluid. If it doesn't, I need to know if there is an ignition spark to the plugs.

Let me know. Also, if the starter is turning the engine, if possible, record the engine turning and upload it for me to hear.

Take care,

Joe
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Tuesday, February 20th, 2024 AT 6:49 PM

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