Question about 2004 Dodge Neon
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Posted on Jan 02, 2017
Here is what I could find for your code error as potential causes:
After market parts and accessories nonconforming to the EVAP system specifications.
Damaged, missing or improperly installed fuel filler cap.
Blockage in fuel vapor hoses/tubes (EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube) in EVAP system.
Disconnected or cracked fuel vapor hoses/tubes in EVAP system.
EVAP canister purge valve stuck closed.
Canister vent (CV) solenoid stuck open.
Fuel tank pressure (FTP) sensor malfunction.
EVAP canister leaking.
Fuel vapor control valve tube assembly blocked.
Fuel vapor vent valve assembly blocked.
Obviously the gas cap would be the easiest and cheapest thing to fix. Just make sure it is put on correctly and tight. If it is not that, I would have to suggest to take it to a mechanic because the other problems on that list are not really DIY material. Hopefully it is the gas cap and you can take care of it yourself. Good luck.
Posted on May 17, 2009
Although I recommend you buy a Haynes service manual for your Dodge, I think you will find the canister attached to the firewall or one of the fender wells.
Most of them look a lot like an overgrown spam can and it will have two connections on it.
Posted on Mar 06, 2009
Sounds like it could be worn gear linkages, which would stop you from being able to push the gearstick in to the reverse gate (usually by pushing the gear stick down or pulling a lever up under it). If you can get under the car take a look, there should be a set of joined poles leading out from where your gear lever is, check that all the connections on these are reasonably tight.
Posted on Aug 04, 2009
CODE PO340 NO CAMSHAFT POSITION SENSOR CIRCUIT FAILURE.CODE PO440 EVAP PURGE SYSTEM FAULT.POSSIBLE CAUSE THE EVAP PURGE VALVE VACUUM SUPPLY IS LEAKING OR CLOGGED.OR THE EVAP PURGE SOLENOID HAS FAILED.
Posted on Oct 12, 2009
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