P0340 code

Was it flooded? If it starts you know the spark is good. So if you clear the P0340 it will reset right away?

Apparently I have an intermitted problem. Further checking I noticed the spark is leaving during initial cranking.

It sounds like you have a defective camshaft position sensor. Here is a guide to help you get the sensor changed out. Make sure you have an OEM sensor it makes a difference.

https://www.2carpros.com/articles/camshaft-angle-sensor-replacement

Here is what it will be like on your car I have included both 4 and 6 cylinder engines.

Please let us know what you find.

Cheers

That did the trick. I got an OEM sensor and it started up and has been running okay ever since. Thanks 2Carpros! you guys are great.

Engine Mechanical problem
1999 Nissan Altima 4 cyl Two Wheel Drive Automatic 120000 miles

when crank noise but not starting

DTC P0340 Camshaft Position Sensor Circuit Malfunction

A code P0340 could mean one or more of the following has happened:

•a wire or connector in the circuit could be grounded/shorted/broken
•the camshaft position sensor may have failed
•the PCM may have failed
•there exists an open circuit
•the crankshaft position sensor may have failed
Possible SolutionsWith a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:

•Visually inspect all the wiring and connectors in the circuit
•Check for continuity in the circuit wiring
•Check the operation (voltage) of the camshaft position sensor
•Replace the camshaft position sensor as required
•Check the crankshaft position circuit as well
•Replace circuit wiring and/or connectors as required
•Diagnose/replace the PCM as required