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Amedee
Amedee, Dodge Technician
Category: Dodge
Satisfied Customers: 24424
Experience:  ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
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code of po340 changed camshaft position sensor still get code car

Resolved Question:

car will not start get code of po340 changed camshaft position sensor still get code car still will not start help
Submitted: 4 years ago.
Category: Dodge
Expert:  Amedee replied 4 years ago.
Hello!

I take it the engine is cranking over but not starting?

Does the engine have spark when cranking it over?

Does the MAP sensor have 5 volts with the key on?
Customer: replied 4 years ago.
engine is cranking but not starting not sure if engine has spark. the sensor was change still shows code and car still will not start
Expert:  Amedee replied 4 years ago.
Ok.. the first thing to do is check for spark. If there is spark, check to see if it runs on starting fluid. If there is no spark, we check to be sure that the cam and crank sensor have reference voltage with the key on. If so, your timing belt could have broke or jumped time.
Customer: replied 4 years ago.
have to put battery back in car will take a min. what is best way to check for spark. Should there have been a warning sign that this was going to happen went out to go to work and car would not start.
Expert:  Amedee replied 4 years ago.
When the belt brakes or jumps time, it usually does not give a warning.

Also, you could check engine compression to verify this.
Customer: replied 4 years ago.

how do you check for spark

Expert:  Amedee replied 4 years ago.
Just gain access to the spark plugs and put a spark tester in place of the spark plug from the wire or ignition coil and have someone crank the engine over while you watch for spark.
Customer: replied 4 years ago.
there is spark what next
Expert:  Amedee replied 4 years ago.
Again, then check to see if it runs on starting fluid. You might just have a bad fuel pump.
Customer: replied 4 years ago.
where to you put the starting fluid to check. why would it be still showing this code
Expert:  Amedee replied 4 years ago.
Because the wiring could be an issue or because the valve timing is off. Sometimes if the crank sensor shorts out if can cause this camshaft position sensor code. You could have more than one problem.

Add starting fluid to the intake where the air filter is located. Spray it towards the intake into the air snorkle while someone is cranking the engine over and see if it starts.
Customer: replied 4 years ago.
car did not start on starting fluid.
Expert:  Amedee replied 4 years ago.
Ok.. then the valve timing is most likely off. I would check the timing belt and engine compression.

I hope this helps!

Please don't forget to indicate that you are happy with my answer so I get credit for helping you today.

Best regards

Amedee
Customer: replied 4 years ago.
if it is a problem with the timing belt why is it still showing the code po340
Expert:  Amedee replied 4 years ago.
Because the valve timing is out of time and the computer is confused.
Customer: replied 4 years ago.
could new sensor be bad. also there is compression just checked
Expert:  Amedee replied 4 years ago.
YES.. the new sensor could be bad but it is not likely.

Please provide me with the compression readings.

Thanks!
Customer: replied 4 years ago.
do not have any way to give you compression readings
Expert:  Amedee replied 4 years ago.
Just tell me the readings you got.
Customer: replied 4 years ago.
no readings held had at intake breather had alot of suction in and out
Expert:  Amedee replied 4 years ago.
Ok.. this is not good enough. You need to use a compression gauge.
Customer: replied 4 years ago.
can get a compression gauge will take awhile what should my readings be 1,2,3
Expert:  Amedee replied 4 years ago.
Above 100 psi.
Customer: replied 4 years ago.
what do i do if readings are correct. what if readings are wrong
Expert:  Amedee replied 4 years ago.
Then you pull the timing cover and check the timing belt.
Customer: replied 4 years ago.
still don't understand why getting the code if it has to do with the timing belt
Expert:  Amedee replied 4 years ago.
I just told you. It is because the valve timing is off and your computer is confused on where the camshaft is in rotation related to the crankshaft. This is what they do when the engine is out of time. They set this P0340 code
Customer: replied 4 years ago.
seems hard to get to the timing belt any easy way to do this
Expert:  Amedee replied 4 years ago.
No.. there are no shortcuts. You just need to get in there and do it.

Please don't forget to indicate you are happy with my answer so I get credit for assisting you today.

Best Regards

Amedee
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