P0340 is error code for Camshaft Postion Sensor Circuit Malfunction
Trouble code P0340 means:Camshaft position sensor circuit malfunction
Camshaft position sensor circuit malfunction.
If you are referring to OBDII trouble code U0001; It is a generic fault code (not manufacturer specific). It is an error detected in the Engine Control Module's Controller Area Network.
if it is OBDII hook it up to the tester which can be done for free at advanced auto parts. Advance auto parts in my area will no longer clear codes for you.
You need a OBDII code reader. Stop by a Auto Zone parts store, they will read the error code for you and reset the Chk engine lite. No charge
The Check Engine Soon (CES), also known as the Service Engine Soon (SES) light, comes on due to an OBDII error code being reported to the vehicle's computer. There are literally hundreds of OBDII engine codes referring the emissions system, engine and transmission, for example. A CES/SES code can range from a minor to potentially catastrophic mechanical/electrical problem and should be scanned immediately.
There are a lot of sensors that can trip the engine light, you would have to scan it to know which one is causing the error
Nice answer. For any vehicle, try looking up your codes here: http://www.obd-codes.com/trouble_codes/
There is no error code PO329 for a Nissan Altima. The closest codes for this would be P0335 which is the CKP Sensor or P0340 which is the CMP Sensor, Detectable Or Undetectable Circuit.
An error code P1684 from an OBDII code reader indicates that the battery had recently been disconnected. This is normal if a new battery was installed but can indicate a connection issue or grounding problem.
See link below for a complete list of OBDII codes.
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)